Activity for dlib C++ Library

Davis created a blog post

Davis — Wed, 28 May 2025 00:54:50 -0000

dlib C++ Library: 20.0 Released

dlib C++ Library released /dlib/v20.0/dlib-20.0.zip

dlib C++ Library — Wed, 28 May 2025 00:54:04 -0000

dlib C++ Library released /dlib/v20.0/dlib-20.0.tar.bz2

dlib C++ Library — Wed, 28 May 2025 00:54:04 -0000

william john posted a comment on discussion Open Discussion

william john — Fri, 19 Apr 2024 03:05:33 -0000

I diligently followed every step outlined in the documentation, just as I've done with older versions of dlib without encountering any issues with this link

Balázs Bámer posted a comment on discussion Help

Balázs Bámer — Mon, 29 Jan 2024 07:33:24 -0000

That was also my guess. It is happening already on the first few function evaluations. Thank you.

Davis posted a comment on discussion Help

Davis — Sun, 28 Jan 2024 17:39:08 -0000

Na that shouldn't be happening. You should see each dimension changing in value unless it's been running long enough to figure out that those are the only legit values. That would also though require the bounds you set to be tight enough to bottle it up into that area. Or there is just a bug in your code. On Sat, Jan 27, 2024 at 2:29 PM Balázs Bámer kolaloka@users.sourceforge.net wrote: Hi All, I have a problem using find_max_global. I'm using a search space with a dimension of 9, and as the optimizer...

Balázs Bámer posted a comment on discussion Help

Balázs Bámer — Sat, 27 Jan 2024 19:29:45 -0000

Hi All, I have a problem using find_max_global. I'm using a search space with a dimension of 9, and as the optimizer is exploring the search space, the last 4 dimension values are always the same. Can this be normal? Thank you in advance. Best regards: Balazs

Davis posted a comment on discussion Help

Davis — Sun, 19 Nov 2023 23:48:39 -0000

Aside from making sure compiler optimizations are on, use smaller images. See also http://dlib.net/faq.html#Whyisdlibslow On Thu, Nov 16, 2023 at 6:33 AM Nikhil B bwajster@users.sourceforge.net wrote: The code below only runs at 1-2FPS. Need help making the necessary changes to improve the frame rate to about 10fps. The code is implemented on the jetson nano. ~~~ import face_recognition import cv2 import os import dlib import pickle import time print(cv2.version) fpsReport=0 scaleFactor=.25 Encodings=[]...

Nikhil B posted a comment on discussion Help

Nikhil B — Thu, 16 Nov 2023 11:33:04 -0000

The code below only runs at 1-2FPS. Need help making the necessary changes to improve the frame rate to about 10fps. The code is implemented on the jetson nano. import face_recognition import cv2 import os import dlib import pickle import time print(cv2.__version__) fpsReport=0 scaleFactor=.25 Encodings=[] Names=[] with open('train.pkl','rb') as f: Names=pickle.load(f) Encodings=pickle.load(f) font=cv2.FONT_HERSHEY_SIMPLEX cam=cv2.VideoCapture(0) timeStamp=time.time() while True: _,frame=cam.read()...

jiapei100 posted a comment on discussion Open Discussion

jiapei100 — Sat, 08 Jul 2023 05:17:24 -0000

Successfully built DLib-19.24 with C++11, but failed with C++14, and C++17 also failed.

Arsene Kouto posted a comment on discussion Open Discussion

Arsene Kouto — Tue, 04 Apr 2023 08:44:34 -0000

Guten Tag, Ich versuche gerade ein Programm für 3D Gesicht Modellierung zu erstellen. Für die Enplementierung in C++ verwende ich Dlib. Da es sich um ein PRnet Programm habe ich das Problem, dass ich keine Prnet Quelle in der Dlib Bibliothek finde. Ich habe in Internet folgende Quelle gefunden: include aber dies wird von der Bibliothek nicht erkannt. Haben Sie vielleicht eine Ahnung wie ich hier vorgehen kann? Viele Grüße Arsene

Andrey Isaev modified a wiki page

Andrey Isaev — Sun, 11 Sep 2022 10:10:56 -0000

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Davis posted a comment on discussion Open Discussion

Davis — Tue, 09 Aug 2022 13:13:42 -0000

I just tried a bunch of values and found some that worked :) On Fri, Aug 5, 2022 at 1:14 AM John Puskin johnpuskin@users.sourceforge.net wrote: Hi Davis. I wonder how do you determine distance as 0.6, margin as 0.04 and dimension as 128 in face recognition? What do you think about for dimension 32, setting distance as 0.3 and margin as 0.02? Thank you for your valuable dlib library. About Margin, Distance and Dimension of Face Recognition Sent from sourceforge.net because you indicated interest in...

John Puskin posted a comment on discussion Open Discussion

John Puskin — Fri, 05 Aug 2022 05:14:43 -0000

Hi Davis. I wonder how do you determine distance as 0.6, margin as 0.04 and dimension as 128 in face recognition? What do you think about for dimension 32, setting distance as 0.3 and margin as 0.02? Thank you for your valuable dlib library.

Davis created a blog post

Davis — Sun, 08 May 2022 14:44:44 -0000

dlib C++ Library: 19.24 Released

dlib C++ Library released /dlib/v19.24/dlib-19.24.zip

dlib C++ Library — Sun, 08 May 2022 14:44:03 -0000

dlib C++ Library released /dlib/v19.24/dlib-19.24.tar.bz2

dlib C++ Library — Sun, 08 May 2022 14:44:03 -0000

Davis posted a comment on discussion Help

Davis — Fri, 04 Feb 2022 13:59:07 -0000

http://dlib.net/faq.html#HowdoIsetthesizeofamatrixatruntime On Fri, Feb 4, 2022 at 2:35 AM "Kovács János" kovatsjanos@users.sourceforge.net wrote: Hello! I'm stucked with my work. I'm new to dlib. My questions concern (Q1.) the usage of dlib datastructures. My task is to perform spectral_clustering. I studied: http://dlib.net/kkmeans_ex.cpp.html. (Q2.) I have to separate training from the classification. Question 1 1 //In MyClass.cpp 2 void doTrain(size_t pClusterN, size_t pNR, size_t pNC, float...

Davis posted a comment on discussion Help

Davis — Fri, 04 Feb 2022 13:34:14 -0000

See http://dlib.net/faq.html#HowdoIsetthesizeofamatrixatruntime

Kovács János posted a comment on discussion Help

Kovács János — Fri, 04 Feb 2022 07:35:35 -0000

Hello! I'm stucked with my work. I'm new to dlib. My questions concern (Q1.) the usage of dlib datastructures. My task is to perform spectral_clustering. I studied: http://dlib.net/kkmeans_ex.cpp.html. (Q2.) I have to separate training from the classification. Question 1 1 //In MyClass.cpp 2 void doTrain(size_t pClusterN, size_t pNR, size_t pNC, float pData) 3 { 4 //pData is a matrix flattened to a single row. pData is of pNRxpNC length. 5 6 using sampletype = matrix; // 1row x...

Davis created a blog post

Davis — Tue, 25 Jan 2022 03:34:49 -0000

dlib C++ Library: 19.23 Released

dlib C++ Library released /dlib/v19.23/dlib-19.23.tar.bz2

dlib C++ Library — Tue, 25 Jan 2022 03:34:02 -0000

dlib C++ Library released /dlib/v19.23/dlib-19.23.zip

dlib C++ Library — Tue, 25 Jan 2022 03:34:02 -0000

Jaroslaw Syrek posted a comment on discussion Open Discussion

Jaroslaw Syrek — Thu, 02 Dec 2021 09:35:22 -0000

Hi Mr. Davis. I trained three separate detectors based on your example : http://dlib.net/dnn_mmod_train_find_cars_ex.cpp.html As a result I got three ".dat" files, Each detect one type of object. front.dat , rear.dat , side.dat Is it possibile to "merge" those 3 files and load into "dnn_mmod_find_cars2_ex.cpp" example ? thank you

Davis posted a comment on discussion Open Discussion

Davis — Wed, 24 Nov 2021 14:51:58 -0000

Yeah find_min_box_constrained is what you want. On Mon, Nov 22, 2021 at 12:43 PM Gordon N. gordonn@users.sourceforge.net wrote: I have a non linear equation with one free parameter to solve. Is there a possibility in dlib to set a constraint on that parameter because the equation contains some logarithms and must not be smaller or equal to zero. My first guess is to use dlib::find_min_box_constrained with a lbfgs_search_strategy where the functional is the squared difference from the target result....

Gordon N. posted a comment on discussion Open Discussion

Gordon N. — Mon, 22 Nov 2021 17:43:32 -0000

I have a non linear equation with one free parameter to solve. Is there a possibility in dlib to set a constraint on that parameter because the equation contains some logarithms and must not be smaller or equal to zero. My first guess is to use dlib::find_min_box_constrained with a lbfgs_search_strategy where the functional is the squared difference from the target result.

John Puskin posted a comment on discussion Open Discussion

John Puskin — Sat, 03 Jul 2021 07:38:20 -0000

Thanx for your answer. If you consider adding integer quantization or even if float16 support to dlib DNN modules, it will give us superior performance. Otherwise, becuase of speed requirements, even I hate, I have to use "pseudo-open source" python based DNN platforms.

Davis posted a comment on discussion Open Discussion

Davis — Sat, 26 Jun 2021 20:56:10 -0000

No, it's all 32bit everywhere right now.

John Puskin posted a comment on discussion Open Discussion

John Puskin — Thu, 10 Jun 2021 15:44:02 -0000

As far as I know, dlib dnn model weights employ float-32 bits and there is no ready-to-use dnn model weight quantization C++ code. However, I think that if we use float-16, we make inference faster. Is there an easy way to force dlib dnn models to use 16-bit floating numbers?

Davis posted a comment on discussion Open Discussion

Davis — Mon, 07 Jun 2021 06:08:11 -0000

Yeah, that's all correct. There are lots of ways to do it, simplest is probably what you suggested of using imglab to just prerotate by a big value. On Thu, May 27, 2021 at 4:16 AM John Puskin johnpuskin@users.sourceforge.net wrote: mmod automatically determines the detector window's sizes by analyzing the dataset without considering the cropper rotation angle. However if I set cropper rotation angle a high value, (e.g. cropper.set_max_rotation_degrees(90) ) dataset will dramatically change and previous...

John Puskin posted a comment on discussion Open Discussion

John Puskin — Thu, 27 May 2021 08:16:17 -0000

mmod automatically determines the detector window's sizes by analyzing the dataset without considering the cropper rotation angle. However if I set cropper rotation angle a high value, (e.g. cropper.set_max_rotation_degrees(90) ) dataset will dramatically change and previous "detector window's sizes" might not suffice. Do I miss something? How can I handle highly rotated and cropped dataset? Rather than setting a high value for cropper angle, should I manually rotate the dataset? (e.g. "imglab --rotate...

Davis posted a comment on discussion Open Discussion

Davis — Wed, 26 May 2021 02:31:08 -0000

It really depends. It's fundamentally easier to train separate models most of the time since you can tweak and adjust them separately. E.g. you can adjust detector A without any possibility of messing up detector B. At the same time, if you put some effort in you can usually make one single model that does multiple things at much less overall computational cost. On Mon, May 24, 2021 at 3:29 AM John Puskin johnpuskin@users.sourceforge.net wrote: Hi Davis. Which one is the best strategy for multi-object...

John Puskin modified a comment on discussion Open Discussion

John Puskin — Mon, 24 May 2021 07:34:09 -0000

Hi Davis. Which one is the best strategy for multiclass-object detection? 1. Train separate classifier for each object type 2. Train one classifier with different labels as in "dnn_mmod_find_cars2_ex.cpp"

John Puskin posted a comment on discussion Open Discussion

John Puskin — Mon, 24 May 2021 07:29:30 -0000

Hi Davis. Which one is the best strategy for multi-object detection? 1. Train separate classifier for each object 2. Train one classifier with different labels as in "dnn_mmod_find_cars2_ex.cpp"

John Puskin posted a comment on discussion Open Discussion

John Puskin — Wed, 19 May 2021 10:03:18 -0000

I got accuracy > 90% . Thanx a lot.

Davis posted a comment on discussion Open Discussion

Davis — Fri, 30 Apr 2021 12:20:02 -0000

Try training a linear SVM on top of it and see if it works. Might be ok.

John Puskin posted a comment on discussion Open Discussion

John Puskin — Thu, 29 Apr 2021 22:46:22 -0000

Dear Davis, I plan to use your 128 dimensional face recognition representation for beard detection. Any suggestion?

Davis created a blog post

Davis — Sun, 28 Mar 2021 13:29:10 -0000

dlib C++ Library: 19.22 Released

dlib C++ Library released /dlib/v19.22/dlib-19.22.tar.bz2