https://sourceforge.net/p/mtfmapper/activity/Recent activity for MTF mapperenSat, 25 Apr 2026 09:28:07 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483c/6cc9/caf9/2343Dear Frans, Thank you for thoroughly analyzing the data! I see, I hadn't considered the reflection from the lighting. Indeed, the analysis didn't work well unless I set the threshold low, so it seems the lighting was poor. Next time I take photos, I'll try adjusting things like masking unnecessary areas and ensuring the light is parallel. The solder mask was made by a manufacturer called JLCPCB, and the manufacturing method was laser cutting. The Thorlabs chart has a magnification of over 6x, which...Gray-BoxSat, 25 Apr 2026 09:28:07 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483c/6cc9/caf9/2343https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483c/6cc9/caf9Hi Gray-Box, Thanks for sharing the raw images, they are quite interesting! I agree that the edge quality is not as good as one would hope. I know that solder masks are made using different processes: some are laser cut (likely the worst edge quality), others are etched (likely much better edge quality). Regardless, their intended application probably does not depend on edge quality but rather feature size accuracy. I recommend using the good old razor blade as a reference for a given magnification,...Frans van den BerghTue, 21 Apr 2026 15:30:46 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483c/6cc9/caf9https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483c/6cc9Dear Frans, Hello. The stencil plate for soldering has arrived. There are a few things I could improve on, but the results are fairly good. Although the lens can only shoot up to 1x magnification, I tried shooting a chart up to 5x magnification. Using the --invert command, it seems that analysis is possible. However, when I actually look at the chart, the edges are jagged. Is this quality usable as is? I've uploaded the images below, so I would appreciate it if you could take a look. https://drive.google.com/drive/folders/1D-D1-hWUJRJJ1DBoO-_Hpnr_Eu6lOKz4?usp=drive_link...Gray-BoxSat, 04 Apr 2026 15:54:22 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483c/6cc9https://sourceforge.net/p/mtfmapper/discussion/general/thread/4b82a423a4/?limit=25#c4d4Love the program! Thanks for creating it. Has the save data button issue been resolved. I still have that issue.Brooks ChildersFri, 03 Apr 2026 12:56:27 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/4b82a423a4/?limit=25#c4d4https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483cDear Frans, Thank you for the advice! After much deliberation, I decided to make it using a lens grid. This was my first time creating a Gerber file, but I managed to create something that seems usable for soldering stencils. I'll share the file for anyone who might need it in the future. https://drive.google.com/drive/folders/1_0NO7nSbgnTxzfRPv6LA1axNeFRO5kyK?usp=sharing Once I receive the actual product and have finished evaluating it, I will report back on this forum. Thank you very much. Regards,...Gray-BoxSun, 22 Mar 2026 08:21:50 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4/483chttps://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4Hi! I have a slight preference for the lensgrid chart because the edges are better aligned with radial and tangential directions, provided you position the center of our lens on the center of the chart, of course. And the lensgrid has some fine-tuning to try and avoid the worst case edge orientations (like exactly 45 degrees). This is more of a purist thing, though. A lot of people end up combining the radial and tangential measurements anyway. On the other hand, as long as the edges are "mostly...Frans van den BerghWed, 18 Mar 2026 17:37:14 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984d/3fc4https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984dDear Frans, Hi :) I've learned that I can print detailed charts using a laser printer. However, I've also found that the edge accuracy isn't very good at 1.0x magnification. Therefore, it seems I'll need to create a soldering stencil, as originally planned. I apologize for the additional question, but regarding chart types, is my understanding correct that the difference between a lens grid and a grid is the chart orientation and sampling points? I understand that lens grid charts are relatively...Gray-BoxWed, 18 Mar 2026 15:41:26 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#984dhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3b44Dear Frans, Thank you for your quick reply. I haven't used the alignment function because I sometimes use lenses that don't have Exif data. But, as you said, it's a good idea to print it out on paper and test it. I'll report back if it works! (It might be interesting if we could also share the Gerber file.) Thank you very much. Regards, Gray-BoxGray-BoxMon, 16 Mar 2026 15:48:28 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3b44https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3f4b/0e31/560aJust to add to that, the only feature that requires the circular fiducials is the chart orientation estimation feature. The circular features are not needed if you perform your target alignment manually.Frans van den BerghMon, 16 Mar 2026 15:36:03 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3f4b/0e31/560ahttps://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3f4b/0e31Hi Gray-Box, You can focus on using only the trapezoidal features. My recommendation is to use the mtf_generate_test_chart program included with MTF Mapper to produce a suitable .svg file, then use something like Inkscape to simply delete all the circular fiducials. You can even generate your own target design, as long as the edges of your squares (or somewhat trapezoidal shapes) are oriented roughly along the radial and tangential lines. Just test your chart design using a laser printed copy before...Frans van den BerghMon, 16 Mar 2026 15:33:26 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3f4b/0e31https://sourceforge.net/p/mtfmapper/discussion/general/thread/6283b0b3ed/?limit=25#7294Dear Frans, Regarding the circular structure in the MTF Mapper chart, will the analysis still be successful even without this structure? To evaluate lens performance at 1x magnification using an MTF Mapper chart, I'm planning to print the chart using a metal stencil (the kind used for soldering). Due to the limitations of the metal stencil, I can't reproduce the hollow circular structure. Will this cause any problems with the analysis? I would appreciate your opinion. Regards, Gray-BoxGray-BoxMon, 16 Mar 2026 15:17:06 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6283b0b3ed/?limit=25#7294https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3f4bDear Frans, Regarding the circular structure in the MTF Mapper chart, will the analysis still be successful even without this structure? To evaluate lens performance at 1x magnification using an MTF Mapper chart, I'm planning to print the chart using a metal stencil (the kind used for soldering). Due to the limitations of the metal stencil, I can't reproduce the hollow circular structure. Will this cause any problems with the analysis? I would appreciate your opinion. Regards, Gray-BoxGray-BoxMon, 16 Mar 2026 15:16:28 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/36336d8513/?limit=25#3f4bhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#1bf9Hi all, I'm very new to MTF Mapper (and MTF based image analysis in general). I have genuinely been reading the nice HTML documentation that comes with this app so apologies if I simply missed something. When click on the images/views - for example the annotated view in my 1st screenshot - it shows me the MTF curve pop-up as expected but the image view also changes to some weird spikey drawing (2nd screenshot) that looks like a rendering error to me... Can someone confirm that this view is / isn't...Chris ShawWed, 11 Mar 2026 18:56:50 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#1bf9https://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#33e7Hi Frans, Thanks for a quick response! (And the nice program you have created ) :-) Good news is that MTF Mapper 0.7.40 (latest) seems to run perfectly on my personal mini PC. This is a Windows 11, Ultra 9 285H, with integrated Arc 140T GPU. Furthermore I also got your pre-built Linux (Ubuntu 22.04) .deb build working in Docker on my Ubuntu 24.04 machine (same physical hardware as above). This setup would seem to have lots of chances for weird graphics & X11/Wayland glitches - but it works fine!...Chris ShawWed, 11 Mar 2026 18:55:11 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#33e7https://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#1bf9/13e3Hi Chris, Thanks for reporting this. I only have a copy of Windows 10, so my guess is that this is indeed some rendering bug in the OpenGL code when running on Windows 11. A bit of a tangent, but I have also seen rendering issues on Linux when using Wayland. It is indeed a sad day when we can no longer rely on OpenGL to work correctly across different OS versions. It may very well be a bug on MTF Mapper's side that just happened to not show up on Windows 7 and 10? Perhaps one solution is to upgrade...Frans van den BerghWed, 11 Mar 2026 11:03:42 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#1bf9/13e3https://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#1bf9Hi all, I'm very new to MTF Mapper (and MTF based image analysis in general). I have genuinely been reading the nice HTML documentation that comes with this app so apologies if I simply missed something. When click on the images/views - for example the annotated view in my 1st screenshot - it shows me the MTF curve pop-up as expected but the image view also changes to some weird spikey drawing (2nd screenshot) that looks like a rendering error to me... Can someone confirm that this view is / isn't...Chris ShawTue, 10 Mar 2026 17:51:53 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/80a5d69081/?limit=25#1bf9https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1/d841/5e74Additional information. As you said, even with pixel shift, I was able to obtain similar MTF output results as long as I set the pixel pitch correctly. Furthermore, when compared with single-shot data, I found that the graph's jitter was smoothed out (I've also uploaded the single-shot analysis results above). It seems that the results with pixel shift are more accurate in terms of data. I also have data for other lenses, so please contact me if you're interested. All results were taken at 0.1x magnification....Gray-BoxThu, 19 Feb 2026 14:45:40 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1/d841/5e74https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1/d841Dear Frans, It took a long time, but by leveraging AI, I've finally managed to automatically create several variations of plots in gnuplot. I've uploaded the results of my analysis below. https://drive.google.com/drive/folders/1G7DB-TwY7la1Hh0TnEshQ94YIfP5zlUS?usp=sharing I'm still figuring out what each plot means, but just looking at the figures is fun. Please take a look at the results if you're interested. If you find a good plot, implementing it as a function will help many users. I also have...Gray-BoxThu, 19 Feb 2026 14:36:14 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1/d841https://sourceforge.net/p/mtfmapper/code/727/fixed pathologically bad lensgrid curves using clampingFrans van den BerghFri, 06 Feb 2026 09:34:07 -0000https://sourceforge.net/p/mtfmapper/code/727/https://sourceforge.net/p/mtfmapper/discussion/general/thread/f4ba2117cb/?limit=25#5ecb/d59b/4194Frans Thank you for the prompt and useful guidance. I got confused in the early instructions , because of the wealth of choices. Your first paragraph below guided me quickly up the learning curve. Perhaps include it as part of the beginner's guide. I agree about the distracting shadows, which as you suggest are probably due to the cover being placed onto the targets. I shall raise it a couple of cm and perhaps place a grey sheet over the whole. I am using chrome targets on 1.5 mm glass, with edges...C V HorieThu, 01 Jan 2026 09:08:43 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/f4ba2117cb/?limit=25#5ecb/d59b/4194https://sourceforge.net/p/mtfmapper/discussion/general/thread/f4ba2117cb/?limit=25#5ecb/d59bHi! I have managed to open and process your image fairly easily. I would recommend to try setting the "Threshold" parameter to 0.4 as shown in my attached screenshot; this seem to be enough to allow the whole image to be processed using the usual "File->Open" method. After that I expanded the tree-view triangle in the "Data set" list on the right, and clicked on the "annotated" list entry. Then I clicked on the cyan-coloured text that says "0.10" on the leftmost edge of the square, which caused the...Frans van den BerghTue, 30 Dec 2025 13:51:09 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/f4ba2117cb/?limit=25#5ecb/d59bhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/f4ba2117cb/?limit=25#5ecbI have just started to use this (apparently) useful program. I am trying to assess the resolution achieved by a high resolution (1800 dpi) scanner across its platen. Attached is a scan of a target which I have opened in the various ways suggested in the manual, including manual edge selection. But no results or error messages have appeared and the green bar at the bottom stays at 100% whether anything is opened or not. Is the target or image unsuitable? Or have I pressed the wrong button?C V HorieSat, 27 Dec 2025 21:19:54 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/f4ba2117cb/?limit=25#5ecbhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#041c/bd78Hi Ryan, I think the absolute minimum number of fiducials that must be visible is 5 (not counting the two central markers), if I remember correctly. But with only 5 fiducials you are unlikely to have a good estimate of the lens radial distortion parameters, so this might only work with lenses with very low distortion. I would say a reasonable number is around 10, but again this depends on their distribution across the image; measuring pitch or yaw accurately depends on having fiducials near the edges...Frans van den BerghThu, 06 Nov 2025 08:57:33 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#041c/bd78https://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#041cHi Frans, Thank you so much for your patient and incredibly insightful analysis. I truly appreciate you taking the time to look into this and provide such clear guidance. On a separate note, I was wondering if there is a minimum requirement for the number of fiducial markers in the image when conducting the fiducial test. For example, must there be more than a certain number of fiducial markers? Regards, RyanRyanThu, 06 Nov 2025 03:56:46 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#041chttps://sourceforge.net/p/mtfmapper/discussion/general/thread/9ad3bce06e/?limit=25#89bcHi Frans, First off, thank you very much for maintaining and sharing the MTF Mapper project — it’s an incredibly useful tool! If you find the time, it would be great if you could update the source files, test sample charts, and possibly the Ubuntu packages to the latest state. This would help users who rely on the packaged versions and example data for testing and calibration. Thanks again for your work and for keeping this valuable project available to the community! Best regards, InspirerInspirer42Fri, 24 Oct 2025 13:13:15 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/9ad3bce06e/?limit=25#89bchttps://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#0b84/f611Thanks for sharing these results, they are pretty compelling! If you need to do something like this in the future, just add the --debug flag to your MTF Mapper command. This will dump some text that you can scrape, the focus offset is somewhere near the end of the output. I can share a few interesting insights: 1. I have worked with Zemax models of lenses to see what the relationship between the focus distance (camera to target) and back focus distance (lens to sensor) is. For one specific lens,...Frans van den BerghFri, 24 Oct 2025 11:23:21 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#0b84/f611https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#0b84Hi, I did more experiments a bit of time ago but did not have time to share it here. I did use some batch script to run MTF-Mapper on hundreds of pictures collected over a long period of time. Then I used batch crop of the result pictures and batch OCR to collect the offset value form the cropped picture (did not find a way to get the offset value in a text file). With this I have been able to run long tests without wasting time collecting offset values. The first test I did was to save pictures...PryzetThu, 23 Oct 2025 07:48:23 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#0b84https://sourceforge.net/p/mtfmapper/discussion/general/thread/ee134067ba/?limit=25#e1b0Hello, First of all, thanks for the excellent work on MTF-Mapper. I’d like to ask whether there is a way to manually fix the minimum and maximum Y-axis limits in MTF plots. In my workflow, I need to compare multiple plots. I’ve noticed that, in most cases, the application sets the Y axis (contrast) to 0–1, but in some plots the upper limit appears as 1.1. This variation makes visual comparison difficult. Would it be possible to Set fixed Y-axis limits in the graphical interface and/or from the command...José Antonio C.Mon, 20 Oct 2025 12:08:27 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/ee134067ba/?limit=25#e1b0https://sourceforge.net/p/mtfmapper/code/726/discard potential fiducials that touch the image edgeFrans van den BerghMon, 20 Oct 2025 08:53:43 -0000https://sourceforge.net/p/mtfmapper/code/726/https://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#5182/484dHi Ryan, Interestingly, the failure is caused by one of the fiducials that has been cut in half by the framing. I have marked the culprit on your sample image. I just used GIMP to remove the offending fiducial, and then the chart orientation feature of MTF Mapper works as expected (see other attachment). I was not even aware of this failure mode, but the particular fiducial (the one I marked in red) is interpreted as "code 0", which is the code usually reserved for the two black fiducials (with the...Frans van den BerghMon, 20 Oct 2025 08:34:17 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#5182/484dhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#5182Dear Frans, I hope you are having a productive week. We are occasionally experiencing an issue where the software reports "Fiducials not found" during operation. Before troubleshooting, we would like to confirm the system's requirements. Could you please provide guidance on the exact parameters or conditions that must be met for the software to successfully lock onto the reference points? I have also included an image of a recent occurrence for your reference. If possible, a quick review to see if...RyanMon, 13 Oct 2025 02:10:25 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/30fe474de8/?limit=25#5182https://sourceforge.net/p/mtfmapper/discussion/general/thread/dd405b2535/?limit=25#39c6Hi Frans, we found ourselves coming back to this issue once again. We are now using rectangular and square slits in front of a light source to generate strong edges (four edges) in the acquisition for MTF computation. Please in the attached images two screenshots of typical acquisition for MTF measurement using these two targes. With the rectangular slit, horizontal and vertical edges can be discriminated by their length, but this is no longer possible with the square target. For this reason, we...lorenzo del caldoThu, 11 Sep 2025 14:52:25 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/dd405b2535/?limit=25#39c6https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1/8744Dear Frans, Thank you for all your advice. I was just writing various scripts this morning to batch process a large amount of data. I learned a lot by comparing various MTF output results and line-of-resolution data. It's very exciting and fun. I was also able to confirm that the qualitative evaluation based on the analysis results and the subjective quantitative evaluation results tend to coincide. I'm really looking forward to comparing the many lenses I have at hand. Thank you for creating and...Gray-BoxFri, 15 Aug 2025 16:10:58 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1/8744https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1Hi Gray-Box, It sounds like you already have solutions to some of your questions, but I'll try to address them: * Adding a way to fix the scale for chromatic aberration or the 2D grid plots via the GUI is possible, and something that would not take a huge amount of work, so I might consider it; * I don't have access to any cameras to produce pixel-shifted images, so I'm hesitant to implement any corrections. But remember that pixel shifting increases the sample density only, it does not alter the...Frans van den BerghFri, 15 Aug 2025 13:28:59 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265/2dd1https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#e3c3Dear All, I'm sorry to ask a question after I've already done so, but I've read the help and understood a lot of things. What I wanted to do was use command line mode and I was able to automate some of the tasks by renaming on the command line. I'm going to keep using command line mode for a while. I'll ask again if there's anything I can't solve on the command line. Thank you. Gray-BoxGray-BoxWed, 13 Aug 2025 15:01:27 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#e3c3https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265Dear Author, I recently started using MTF Mapper. I'm very impressed with this product, which allows for stable, quantitative data acquisition with simple settings. I'm grateful for this product because it allows everyone to accumulate data by setting the same conditions. Thank you. I have a few questions after using it, and I would appreciate your advice. Is it possible to set the scale to a fixed value to make it easier to compare lens performance? I would particularly like to set the scale of...Gray-BoxTue, 12 Aug 2025 03:15:37 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/26b66e9fb5/?limit=25#f265https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25&page=1#7fe8Hi Frans, I'm back after a few days of vacation. I've done several tests with the different images into Imatest, ImageJ and MTFM and will share them with you. It's quite interesting.hugo rodriguezFri, 08 Aug 2025 21:35:50 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25&page=1#7fe8https://sourceforge.net/p/mtfmapper/discussion/general/thread/32ee32ed91/?limit=25#0c7d/0182Hi Fizz, You are already on the right track: what you are observing, namely that the results improve when you move further away from the test chart, is what I would expect if print quality was a limiting factor. To answer your questions: 1. Slanted-edge measurements are the product of three parts: MTF_measured = MTF_target * MTF_lens * MTF_sensor. At some point your chart magnification is low enough that the MTF_target part no longer has a measurable impact. If you start with a very high quality...Frans van den BerghThu, 31 Jul 2025 19:23:39 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/32ee32ed91/?limit=25#0c7d/0182https://sourceforge.net/p/mtfmapper/discussion/general/thread/32ee32ed91/?limit=25#0c7dDear Author, First and foremost, thank you for your invaluable contribution. Your software has greatly simplified lens resolution testing for individual users like myself. However, I’ve encountered some inconsistencies in my tests and would appreciate your expertise. Test Setup: Equipment: Nikon Z6 with Z 24-70mm f/4 lens. Charts: A commercially printed ISO 12233-2000 chart (high-quality, slightly smaller than A1). A self-printed lengrid-A1 chart (provided by you). While its slanted edges appear...Leopold FizzWed, 30 Jul 2025 12:51:01 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/32ee32ed91/?limit=25#0c7dhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#ca6eHi Frans, Thank you for your detailed answer. I end up using the A2 chart on A3 paper because I though the software was struggling with my "low resolution" sensor (compared to most DSLRs). But I face the same focus shift issue with A3 chart on A3 paper with all fiducial markers visible. Regarding your question about the MTF measurements meeting my needs. To be honest I did not try this a lot as I a currently most interested in the focus feature. Then I may spend some time measuring MTF of my lenses...PryzetTue, 29 Jul 2025 10:01:44 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#ca6ehttps://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#ca6eHi Frans, Thank you for your detailed answer. I end up using the A2 chart on A3 paper because I though the software was struggling with my "low resolution" sensor (compared to most DSLRs). But I face the same focus shift issue with A3 chart on A3 paper with all fiducial markers visible. Regarding your question about the MTF measurements meeting my needs. To be honest I did not try this a lot as I a currently most interested in the focus feature. Then I may spend some time measuring MTF of my lenses...PryzetTue, 29 Jul 2025 10:01:02 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#ca6ehttps://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#ca6eHi Frans, Thank you for your detailed answer. I end up using the A2 chart on A3 paper because I though the software was struggling with my "low resolution" sensor (compared to most DSLRs). But I face the same focus shift issue with A3 chart on A3 paper with all fiducial markers visible. Regarding your question about the MTF measurements meeting my needs. To be honest I did not try this a lot as I a currently most interested in the focus feature. Then I may spend some time measuring MTF of my lenses...PryzetTue, 29 Jul 2025 09:59:01 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#ca6ehttps://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696/09beHi Pryzet, Here's a quick follow-up to illustrate what I meant by looking for shifts in the 3D surface consisting of the (x, y) pixel coordinates and the corresponding MTF50 measured at that location. Note that MTF Mapper "slides" a small window along the long edges of the black bar targets, thus computing many MTF50 values along each long edge, producing the 3D dataset like the 0raw_points.txt I shared yesterday. I have attached the script (thanks ChatGPT) that is a minimal implementation of what...Frans van den BerghTue, 29 Jul 2025 09:42:54 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696/09behttps://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696/5457Hi Pryzet, There are quite a few potential factors that could affect stability. For now, let's focus (pardon the pun) only on the RGB results: 1. The MTF Mapper test chart orientation estimation is not perfect, partly because a regular camera calibration requires multiple poses of the planar calibration target in order to estimate the lens intrinsic parameters, in particular focal length and radial distortion, but MTF Mapper has to do the same job with only a single target pose. In addition to that,...Frans van den BerghMon, 28 Jul 2025 14:04:59 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696/5457https://sourceforge.net/p/mtfmapper/discussion/general/thread/ef02411d50/?limit=25#f7e0/1a29Hi Jonathan, The MTF Mapper GUI is not really well suited to a workflow that requires combining multiple result sets from multiple images into a single output. Keep in mind that the GUI is really calling the command-line MTF Mapper in the background. I know that other MTF Mapper users have performed analyses like you are interested in, e.g., you capture a sequence of through-focus images and then extract the best result from each part of the field to build a composite result. This requires some scripting,...Frans van den BerghMon, 28 Jul 2025 09:20:57 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/ef02411d50/?limit=25#f7e0/1a29https://sourceforge.net/p/mtfmapper/discussion/general/thread/ef02411d50/?limit=25#f7e0When you focus on the center of a flat test pattern using a lens that has noticeable field curvature, the measured sharpness always tapers off from the center because it is going progressively out of focus towards the edges. You would need to re-focus the lens at various points from the center and somehow incorporate those results into the data. How can one do that? For example the attached Zeiss Biotar does not improve at the edges between F2 and F8. I assume this is field curvature, because stopping...Jonathan LeavittFri, 25 Jul 2025 09:32:53 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/ef02411d50/?limit=25#f7e0https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696Hi, I'm trying to use MTF Mapper Focus chart to measure the focus shift of IR corrected lenses (CCTV lenses) from different manufacturers between white LEDs and IR 850nm lighting. The phenomenon I want to measure is the same as the chromatic aberrations we can notice between Red Green and Blue channels on and RGB picture. My goal is to do a rough focus on the chart with white LEDs, note down of the estimated chart distance and MTF peak position, then turn off the white LEDs and turn on the IR 850nm...PryzetThu, 24 Jul 2025 07:43:31 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696Hi, I'm trying to use MTF Mapper Focus chart to measure the focus shift of IR corrected lenses (CCTV lenses) from different manufacturers between white LEDs and IR 850nm lighting. The phenomenon I want to measure is the same as the chromatic aberrations we can notice between Red Green and Blue channels on and RGB picture. My goal is to do a rough focus on the chart with white LEDs, note down of the estimated chart distance and MTF peak position, then turn off the white LEDs and turn on the IR 850nm...PryzetThu, 24 Jul 2025 07:34:34 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/23a35658e3/?limit=25#4696https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2/1b61/09a7/81c1I'll be out for a few days, will reply you when I'm back :)hugo rodriguezSun, 20 Jul 2025 07:19:45 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2/1b61/09a7/81c1https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2/1b61/09a7Yes, MTF Mapper will directly process raw Bayer images. You can start with a raw camera file such as a .NEF or .CR2, and the MTFM GUI will call dcraw (or libraw) to render the image to a grayscale Bayer-mosaic Tiff file. This only happens when you set the Bayer channel option in the settings, and you'll see an icon next to the filename in the MTFM results list to indicate what type of channel interpretation was used (RGB, single channel grayscale, or Bayer red, green or blue). If you are using the...Frans van den BerghWed, 16 Jul 2025 15:50:03 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2/1b61/09a7https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2/1b61Aha, I understand. I¡ll try to make some tests with other angles but 5º. With distortion I really meant other angles but 5º instead of curved edges, which is hard to find unless you test some fisheye lens or othe really distorted (though these days are quite common as many manufacturers as you know hide that under the 'manufacturer profile'). And in the first paragraph you already answered that. Ok, so to make readings is better to correct the vignetting (even roughly) than to keep the image 'as-is'....hugo rodriguezMon, 14 Jul 2025 21:32:06 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2/1b61https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2Hmm. I don't want to go into too many details regarding SE_MTF since I have never looked at the code myself. But I do suspect that SE_MTF may not handle edge orientations larger than 5 degrees correctly; the earlier versions of the ISO 12233 standard simply required the edge to be at roughly 5 degrees, and many implementations just assume you stick to those parameters. It is entirely possible to use most other edge orientation angles with some minor changes to the algorithm. So that could explain...Frans van den BerghFri, 11 Jul 2025 14:03:09 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5/bdf2https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#d91e/b609Hi again, Hugo! Try mtf_generate_rectangle.exe -m 1.0 -n 0 -o sharp.png in the directory where mtf_mapper.exe lives. For converting between c/p and lp/mm, I use c * (1000 / p) where c is the c/p value and p is the sensor pitch in micron, e.g., 0.442 * (1000 / 5.97) = 74.04 lp/mm, which is close enough to your value to show your formula is correct (exact dimensions of the sensor and number of pixels explain the remaining differences). There are a great number of details that affect the accuracy of...Frans van den BerghFri, 11 Jul 2025 13:10:30 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#d91e/b609https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5All these is because I'm helping a friend, the man behind this website that specializes in lens testing: www.digitalcamaralens.com Actually I'm comparing this particular lens: https://www.digitalcamaralens.com/Html/Objetivos/Yongnuo/100_2.0/Yongnuo-100_2_Analisis.htm He needs to optimize the workflow for testing because it takes so much time in boring tasks. I'm trying to convince him to use MTFM instead of ImageJ with SE_MTF_2xNyquist. But he is worried by seeing how different are the results specially...hugo rodriguezFri, 11 Jul 2025 11:18:11 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#68f5https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#e35bOk, I'm sending you the files I used through WeTransfer for this test as well as some RAW from a Tamrom 16-30mm with a SONY a7R II at all apertures. Please confirm me that you receive the email. It will expire in 3 days, but don't worry if you can't download it. I can also upload then to GDrive if you need.hugo rodriguezFri, 11 Jul 2025 10:39:14 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#e35bhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#d91eHi Frans! Thanks for such a detailed response. Well, all that you explained is the same as I already knew, so I think we are talking the 'same language', great then :) I couldn't create that image with that code as I'm no expert with command line. I wrote this into the program files/MTF mapper: mtf_mapper.exe mtf_generate_rectangle -m 1.0 -n 0 -o sharp.png But got and error... any help will be welcomed :) Regarding the differences between Imatest, sfrmat and MTFMapper I found an article of a friend,...hugo rodriguezFri, 11 Jul 2025 10:35:20 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#d91ehttps://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#6077/df0bHi Hugo! Please send the file to fvdbergh@gmail.com, and I will take a look when my travels are over. But to get back to the cycles/pixel issue, I really did mean one cycle fits into a pixel. If you had a perfect lens then the sensor will simply capture a 50% gray value ... but that is only for a very literal interpretation of 1.0 cycle per pixel. If you look at the slanted-edge method then the SFR is just the contrast as a function of spatial frequency, and we have now chosen to represent spatial...Frans van den BerghThu, 10 Jul 2025 07:38:12 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#6077/df0bhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#6077Hi Frans, That's right, and that's exactly what I always thoughit was: a cycle is the same as a pair of lines. I also did a research in Imatest documentation and confirmed what I did know: a cycle is the same as a pair of lines. Anyway, when you say that " If one line pair is the same width as a pixel, we have one line pair per pixel, which is also one cycle per pixel" I guess you mean a 'pair of pixels' instead of a single pixel because it's simply impossible to have a cycle per pixel. Or maybe...hugo rodriguezWed, 09 Jul 2025 16:33:33 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#6077https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#3a8f/09a0one line pair is a black line and a white line; this can also be interpreted as one cycle, if you place two line pairs next to each other, then the distance from the middle of the first black line to the middle of the second black line is one cycle, however, this is the same distance as yhe width of a black line and a white line together. In other words, a line pair is the same thing as a cycle. when we measure in line pairs per mm, we are talking about physical line pairs as the lens would project...Frans van den BerghWed, 09 Jul 2025 06:52:36 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#3a8f/09a0https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#3a8fHi Frans, thanks a lot for your kind reply. 1) Well, I don't know the sensor model but I used RAWDigger to dig into the manufacturer metadata and there I found the value I was looking for: 6080 photo detectors. I assume it's right. Not a big difference, though, between 6016. 2) Regarding Imatest, I've just realized that when I entered 5.96um as the pixel pitch, the units were 'pixel per inch' instead of 'microns per pixel' which I think is the right one. See attached image. However, this didn't made...hugo rodriguezTue, 08 Jul 2025 11:35:39 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#3a8fhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44ea/d640/ce3cHi Hugo, The best source for the pixel pitch is the sensor datasheet if you know the sensor model number. Next best is if the camera manufacturer posts this number, or perhaps a reputable review site. The least accurate method is to calculate it yourself, mostly because you cannot assume that the sensor dimensions are exactly equal to the nominal format size. Having said that, if you do not have an accurate pitch number, then any approximation is reasonable, meaning that a small error in your calculated...Frans van den BerghTue, 08 Jul 2025 07:53:48 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44ea/d640/ce3chttps://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44ea/d640Hi Frans, thanks for your kind reply. Ok, I guessed that cycles and line pairs give the same values to my understanding. In the end, a complete cycle goes to full white, then to full black and to the starting point... like a pair of lines. But I'll research a bit for more information, I could be wrong. I still have a few questions if you don't mind: 1) Ok, so pixel pitch. To calculate it what data do I exactly need: the final effective pixels or photodetectors? For the D610, with 6016 px width and...hugo rodriguezMon, 07 Jul 2025 08:47:31 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44ea/d640https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44ea/d640Hi Frans, thanks for your kind reply. Ok, I guessed that cycles and line pairs give the same values to my understanding. In the end, a complete cycle goes to full white, then to full black and to the starting point... like a pair of lines. But I'll research a bit for more information, I could be wrong. I still have a few questions if you don't mind: 1) Ok, so pixel pitch. To calculate it what data do I exactly need: the final effective pixels or photodetectors? For the D610, with 6016 px width and...hugo rodriguezMon, 07 Jul 2025 08:44:52 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44ea/d640https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44eaHi Hugo, Apologies for the delay, I'm travelling so my responses may be a bit spotty. I think we have to sort out the different units first. Imatest is reporting cycles per pixel, which are very different from the line pairs per mm you are reporting on via MTF Mapper. In MTF Mapper you can just change the units in the settings (untick lp/mm units). For the lp/mm units to function correctly you also need to set the pixel pitch correctly (I think it should be 5.97 micron for the D610). But for comparing...Frans van den BerghMon, 07 Jul 2025 07:06:47 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865/44eahttps://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865As you can see, with Imatest I get 41.8 lp/mm, about 39 with ImageJ and 92 with MTF Mapper. I thought it could be a simple matter of doubling numbers (lines instead of pairs) but there is still a difference...hugo rodriguezSun, 06 Jul 2025 10:53:00 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#1865https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66/47c3/7930Thanks for replying so fast, Frans. However, I think I explained myself badly: what I really wanted to say is that after linearizing I got the same results that I already got, so the discrepancies with Imatest and ImageJ are still there. This confirms that the software linearizes the images in the first stages, that was what I was referring for... Regards,hugo rodriguezSun, 06 Jul 2025 07:27:40 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66/47c3/7930https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66/47c3/7930Thanks for replying so fast, Frans. However, I think didn't I explained myself well: what I really wanted to say is that after linearizing I got the same results that I already got, so the discrepancies with Imatest and ImageJ are still there. This confirms that the software linearizes the images in the first stages, that was what I was referring for... Regards,hugo rodriguezSat, 05 Jul 2025 13:55:48 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66/47c3/7930https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66/47c3Glad to hear you have resolved the discrepancies! Feel free to ask more questions if you have any. Regards, FransFrans van den BerghSat, 05 Jul 2025 10:14:16 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66/47c3https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66I tried linearizing the image and the results are the same in MTF mapper, so it confirms what you explained, Franshugo rodriguezSat, 05 Jul 2025 07:59:06 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#cc66https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#b9f8Hi there, I was about to start a new thread but maybe this one applies to me. I've just discovered MTF Mapper and I'm impressed with the job you did. Well done! However, I was checking with ImageJ and Imatest Master and I find different values, so I'm not sure what's happening here... I'm loading the attached image captured with a Nikon D610 (24Mpx) and I'm getting: * 92.58 lp/mm in MTF Mapper (see attached capture) * 41.8 C/P (which I guess is the same) in Imatest (see capture) * About 0.41 in ImageJ...hugo rodriguezSat, 05 Jul 2025 07:47:42 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/6875bf0d10/?limit=25#b9f8https://sourceforge.net/p/mtfmapper/discussion/general/thread/41da8754f9/?limit=25#1fc1Thanks Frans, this is exactly what I needed! As for the possible inaccuracies, I haven't noticed any discrepancies so far, but I will keep an eye on it. Thank you again :)BalazsFri, 13 Jun 2025 12:36:15 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/41da8754f9/?limit=25#1fc1https://sourceforge.net/p/mtfmapper/discussion/general/thread/41da8754f9/?limit=25#5a1e/6811Hi Balazs, The quick-and-dirty solution is to do the following: mtf_mapper --chart-orientation DSC_1972.tiff out --debug --logfile test.log and then look in test.log for the line that looks like this: Tait-Bryan angles: 0.424339 45.626967 0.734844 where the angles are listed in roll-yaw-pitch order. You have to remember to pass the --debug flag. I should warn you, though, that I have received reports of inaccurate chart orientation estimates. I only tested over a small range of distances, and it...Frans van den BerghFri, 13 Jun 2025 12:10:30 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/41da8754f9/?limit=25#5a1e/6811https://sourceforge.net/p/mtfmapper/discussion/general/thread/41da8754f9/?limit=25#5a1eFirst of all, thanks for this brilliant software, Frans. Would it be possible to output the Euler angles into a text file from the chart-orientation option rather than just putting them on the image? This would help me automating the process. Otherwise, I'll have to use some sort of OCR to extract this data, but that would be a bit silly as the information is already there in MTF mapper. Thanks, BalazsBalazsFri, 13 Jun 2025 08:15:22 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/41da8754f9/?limit=25#5a1ehttps://sourceforge.net/p/mtfmapper/code/725/fixed up polygon output for generate_rectangleFrans van den BerghSat, 07 Jun 2025 13:46:51 -0000https://sourceforge.net/p/mtfmapper/code/725/https://sourceforge.net/p/mtfmapper/code/724/1. switched svg page over to using floating point coordinatesFrans van den BerghSat, 07 Jun 2025 13:19:52 -0000https://sourceforge.net/p/mtfmapper/code/724/https://sourceforge.net/p/mtfmapper/code/723/added multi-pattern slide target typeFrans van den BerghMon, 26 May 2025 08:17:24 -0000https://sourceforge.net/p/mtfmapper/code/723/https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#26e6Ok, thank you very much. I get it.RyanWed, 16 Apr 2025 13:15:05 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#26e6https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#be15/2860Hmm, I plotted the full SFR curve for your initial image lowvalue.png, as well as an edge from 350mm.png that also happens to have an MTF50 value of 0.08. You can see that the SFR curves are very similar until the contrast drops below 0.1, so it is not surprising that the MTF50 values are similar. By the way, you can get more precision out of MTF Mapper if you process the outputs with a script, but I don't know if you will necessarily get improved accuracy. Is the difference between 0.075 and 0.08...Frans van den BerghWed, 16 Apr 2025 12:59:40 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#be15/2860https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#be15There are still some question, like the photo below, which is much vaguer than the first one mentioned in the topic, but the result of his edge mtf50 analysis is still 0.08.RyanWed, 16 Apr 2025 12:11:31 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#be15https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443/f382/2aba/15faOk, I also see values of about 0.24 cycles/pixel in 150mm.png. Not sure if you still have a question, or if I have answered it already?Frans van den BerghWed, 16 Apr 2025 11:22:45 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443/f382/2aba/15fahttps://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443/f382/2abayes,For the focus of the picture, it is indeed able to reach 0.2-0.3 cycles/pixel ,Take the picture belowRyanWed, 16 Apr 2025 11:14:39 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443/f382/2abahttps://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443/f382I quickly ran MTF Mapper on the image you provided above (not ideal, but I also got 0.08, so it should be representative), and extracted the attached Edge Spread Function. A sharp edge should rise from black to white over a very short distance, perhaps a distance on the order of 1 pixel or less. From the ESF extracted from your image the rise distance looks to be about 8 pixels, so the edge really does appear to be quite blurry. The SFR curve has a "bounce" in it, which suggests that the lens was...Frans van den BerghWed, 16 Apr 2025 10:58:58 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443/f382https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443The edge of the graph looks good, but the value of the software analysis is only about 0.08, what caused thisRyanWed, 16 Apr 2025 10:47:15 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/8d7e86e9ff/?limit=25#2443https://sourceforge.net/p/mtfmapper/discussion/general/thread/40977b030e/?limit=25#1fccDear Frans van den Bergh, Thank you for creating this wonderful tool, MTF Mapper. I would like to use it to test the lenses of my camera. For this purpose, I need to adapt the field of view to be approximately 13 times smaller than the A4 format and to have a different aspect ratio. Additionally, there are cases where the field of view is not rectangular but circular or oval. At the moment, I don't fully understand all the details about how the code functions. I have a few questions: Should the chart...Vasyl ShynkarSun, 08 Dec 2024 19:05:36 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/40977b030e/?limit=25#1fcchttps://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#aefaIs it only me having this problem with saving data with the save buttons on windows PCs?GuidoSun, 01 Dec 2024 12:58:40 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#aefahttps://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#aefaIs it only me having this problem with saving data with the save buttons on windows PCs?GuidoSun, 01 Dec 2024 12:58:20 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#aefahttps://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#aefaIs it only me having this problem with saving data with the save buttons on windows PCs?GuidoSun, 01 Dec 2024 12:54:48 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#aefahttps://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#668fThat worked perfekt. Thank you very much Frans! Instead of cropping the picture I put a white rectangle over the two black horizontal lines. Though I can not save the results on my three windows PC with the save buttons in mtf mapper. One of them is windows 11 and two are windows 10. It is not working with mtfmapper 0.7.38 or 0.7.40. I found the data in: C:\Users\Guido\AppData\Local\Temp\mtfmappertemp_0 So at least I was able to copy the data from there.GuidoSun, 01 Dec 2024 12:48:24 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#668fhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/0aa1aece54/?limit=250#774bHi Frans, Last week I've calibrated three of my lenses to match my camera. MTF Mapper was super helpful in the process, as it makes determining the amount of defocus very straightforward. Essentially, the biggest problem I had was sticking the A0 poster on the wall by myself. Given that every single shot contains some uncertainty in the focus position, I wanted to do a regression of AF Tune Value versus focus mismatch. As far as I could find, exporting the results from the UI does not give you the...rjmFri, 29 Nov 2024 11:46:16 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/0aa1aece54/?limit=250#774bhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#668fThat worked perfekt. Thank you very much Frans! Instead of cropping the picture I put a white rectangle over the two black horizontal lines. Though I can not save the results on my three windows PC. One of them is windows 11 and two are windows 10. It is not working with mtfmapper 0.7.38 or 0.7.40. I found the data in: C:\Users\Guido\AppData\Local\Temp\mtfmappertemp_0 So at least I was able to copy the data from there.GuidoThu, 28 Nov 2024 18:17:42 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#668fhttps://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#1d67/8c0bHi Guido, I have found the underlying reason why MTF Mapper's --imatest-chart option was not working with your images. I think my code was based around an older Imatest chart type that did not have those bright white squares inside the centre column, second row block. Those blocks were brighter than the white background of the chart, causing all kinds of trouble. I have released MTF Mapper 0.7.40 to fix the problem, your test images should now work correctly (maybe with a little adjustment of the...Frans van den BerghWed, 27 Nov 2024 15:12:44 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#1d67/8c0bhttps://sourceforge.net/projects/mtfmapper/files/windows/mtfmapper-0.7.40-win64.exe/downloadMTF mapperWed, 27 Nov 2024 14:23:02 -0000https://sourceforge.net/projects/mtfmapper/files/windows/mtfmapper-0.7.40-win64.exe/downloadhttps://sourceforge.net/p/mtfmapper/code/722/version bumpFrans van den BerghWed, 27 Nov 2024 14:11:31 -0000https://sourceforge.net/p/mtfmapper/code/722/https://sourceforge.net/p/mtfmapper/code/721/improved Imatest chart cropping to handle trimodal histogramsFrans van den BerghWed, 27 Nov 2024 13:59:48 -0000https://sourceforge.net/p/mtfmapper/code/721/https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#1d67/8af4Hi Guido, Sure! To deal with the image brightness problem you could try adjusting the Threshold parameter (in the GUI, Settings->Preferences, the Threshold field under the "Input Flags" group). Or on the command line, try the -t option, I found -t 0.3 worked with your 139.jpg. For dealing with Imatest charts there is the --imatest-chart command line option, and the corresponding File->Open Imatest image GUI menu item. Except I noticed that this is not working correctly with your input images. I have...Frans van den BerghWed, 27 Nov 2024 12:04:02 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#1d67/8af4https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#5768Hi Frans, Thanks again for your response. In the paper they convolve the slit with the presample blur of the sensor and then sample it. Having reread the paper I think this is what I need to do - I was hoping that mtf_generate_rectangle might offer a shortcut for doing this, but from your explanation above, I don't think that it will. I've attached the paper for your interest. Kind regards, Dean.Dean GoffWed, 27 Nov 2024 08:21:29 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#5768https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#1d67Hi Frans, I'm have trouble with pictures from an Imatest chart. Only if I make the picture brighter I get results. Even with the brighter picture I only get results in the center but not on the top and bottom line. Any idea what could cause the problem? Kind regards GuidoGuidoTue, 26 Nov 2024 19:41:41 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/77263e5991/?limit=25#1d67https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#1a6e/e778Hi Dean, I found the paper on Google scholar, but scholar did not find an open-access PDF, so I only have the abstract to go on. If I understand correctly (based on other similar papers) the idea is to use a slit instead of a point light source (too few photons, requires some magnification optics). The slit will have a rect() function impulse response across the narrow part of the slit, compared to the step() impulse response of the slanted-edge method. I suppose if you knew the width of the slit...Frans van den BerghTue, 26 Nov 2024 13:00:50 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#1a6e/e778https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#1a6e/e778Hi Dean, I found the paper on Google scholar, but scholar did not find an open-access PDF, so I only have the abstract to go on. If I understand correctly (based on other similar papers) the idea is to use a slit instead of a point light source (too few photons, requires some magnification optics). The slit will have a rect() function impulse response across the narrow part of the slit, compared to the step() impulse response of the slanted-edge method. I suppose if you knew the width of the slit...Frans van den BerghTue, 26 Nov 2024 12:59:15 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#1a6e/e778https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#1a6e/e778Hi Dean, I found the paper on Google scholar, but scholar did not find an open-access PDF, so I only have the abstract to go on. If I understand correctly (based on other similar papers) the idea is to use a slit instead of a point light source (too few photons, requires some magnification optics). The slit will have a rect() function impulse response across the narrow part of the slit, compared to the step() impulse response of the slanted-edge method. I suppose if you knew the width of the slit...Frans van den BerghTue, 26 Nov 2024 12:57:45 -0000https://sourceforge.net/p/mtfmapper/discussion/general/thread/ca3e1cdbf9/?limit=25#1a6e/e778