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I rebuild 3.1.0 library and again has got a lot of faces on both my books (with Intel HD 4000 one and NVIDIA GeForce GT 425M another) captureFrame=640x480 ; type=16 faces.size()=18446743934142353947 after

capture >> frame; std::cout << "captureFrame=" << frame.cols << "x" << frame.rows << " ; type=" << frame.type() << std::endl;

    std::vector<cv::Rect> faces;
    face_cascade.detectMultiScale(frame, faces, 1.1, 3, 0 | CV_HAAR_SCALE_IMAGE, cv::Size(30, 30));
    std::cout << "faces.size()=" << faces.size() << std::endl;

What are we all doing wrong?

@sturkmen I have the same trouble with igdfcl64.dll. Latest drivers are installed. Is there a known solution to this problem? HP Elitbook Folio9470m Windows 10 x64

I rebuild 3.1.0 library. Tried both detect_blob.cpp and facedetect.cpp. They do not work. Project with facedetect.cpp generate an error "Exception thrown at 0x00007FFF22E36533 (igdfcl64.dll) in OCV310.exe: 0xC0000005: Access violation writing location 0x00000000A8F8B690." at line number 3579 in file ocl.cpp with code retval = clBuildProgram(handle, n, (const cl_device_id*)deviceList, buildflags.c_str(), 0, 0);

Thank you, Tetragramm! It works!

Hi Guys!

Please tell me how to build OpenCV 3.1.0 from github in Visual Studio 2015 to x64.

I used git clone https://github.com/Itseez/opencv.git

and then use Cmake with default setting

after that in Visual Studio there is only one аctive platform - Win32 without any other options.

So after building we can see only x86 directory in install directory.

I tried also make a new platform - x64 and then during building error LNK1112 appears.

Maybe is anywhere guide how to do it?

I try detect_blob.cpp. It works. Yes, i going to rebuild tomorrow. Now is night here in Russia :( Bye! See you late!

May be problem is in precomiled libs. Here is describe step by step: http://dogfeatherdesign.com/opencv-3-.... Sorry offtop, this about 3.0.0

@sturkmen i tried your code above in 3.0.0 and it don work properly. There is access violation error at size < 462. (At size >462 faces.size=0). And also, you are using LBP cascade and CV_HAAR_SCALE_IMAGE key. Is it correct?

@sturkmen No, I did not build the library. I used ready-made from opencv3.1.0\opencv\build\x64\vc14\lib

Hi! I have some problem on Visual Studio 2015 Community, C++, Windows 10, OpenCV 3.1, x64, tried both Debug and Releas. Source code like above. I tried various combinations of the debug configurations: MT, MD, MDd I tried all of classifiers for faces: haarcascade_frontalcatface.xml, haarcascade_frontalface_alt.xml, haarcascade_frontalface_default.xml from opencv\build\etc\haarcascades

When I tried source line

face_cascade.detectMultiScale(frame_gray, faces, 1.1, 3, 0 | CV_HAAR_SCALE_IMAGE, Size(30, 30));

the error access violation record appears ('record' or 'writing' i do not shure because have a Russian interface)

Next I tried change Size(500,500), and when line pass but faces keeps billlllions of faces:

Next I tried change Size(500,500), and when line pass but faces keeps billlllions of faces.

I tried various combinations of the debug configurations: MT, MD, MDd I tried all of classifiers for faces: haarcascade_frontalcatface.xml, haarcascade_frontalface_alt.xml, haarcascade_frontalface_default.xml from opencv\build\etc\haarcascades

When I tried source line face_cascade.detectMultiScale(frame_gray, faces, 1.1, 3, 0 | CV_HAAR_SCALE_IMAGE, Size(30, 30)); the error access violation record appears (record or writing i do not shure because have a Russian interface)

I have the same problem - innumerable number of faces in face_cascade.detectMultiScale.

Visual Studio 2015 Community, C++, Windows 10, OpenCV 3.1, x64, tried both Debug and Releas. Source code like above.

I have the same problem - innumerable number of faces in face_cascade.detectMultiScale.

Visual Studio 2015 Community, C++, Windows 10, OpenCV 3.1, x64, tried both Debug and Releas. Source code like above. I do not know what for OCV version is this code.

I tried various combinations of the debug configurations: MT, MD, MDd I tried all of classifiers for faces: haarcascade_frontalcatface.xml, haarcascade_frontalface_alt.xml, haarcascade_frontalface_default.xml from opencv\build\etc\haarcascades

When I tried source line face_cascade.detectMultiScale(frame_gray, faces, 1.1, 3, 0 | CV_HAAR_SCALE_IMAGE, Size(30, 30)); the error access violation record appears (record or writing i do not shure because have a Russian interface)

Next I tried change Size(), and when line pass but faces keeps billlllions of faces:

C:\fakepath\2016-04-17_18-42-15.png

I tried also sample code from opencv\sources\samples\cpp\facedetect.cpp it do not work too, but it is an another story.