How to increase number of simultaneous face detection in one frame

[rahulsharma11]

Hi,
Thanks for the awesome project.
Here i tested for the max number of simultaneous face recognition/detection (in one frame) is 3 . Can i increase this number?
In older version "FaceRecognition" there is a parameter "maxFaceNum" that can be used to increase simultaneous number of face detection. Is there something same in this project?
Thanks.

[xcls1117]

@rahulsharma11 Yes, see facecaffe/face_demo.cpp: std::string FaceDemo::Recognize(cv::Mat &frame, int face_num)
you can see max number is set when it's called, and called here:
facecaffe/AlgThread.cpp: line 60 (default set to 3)
std::string ss = mFace_demo.Recognize(mRgb, 3);

[rahulsharma11]

Ok....Thanks.
I did change that to "5".
Then it was throwing segmantation fault. I also changed here-
facecaffe/AlgThread.cpp: line 164 : for(int icount = 3; icount > atoi(sub[1]); icount--) to "icount=5"
Then there was no error but as soon it detects 4 faces, it shuts down giving Aborted error msg.
Do i need to change somewhere else?

[xcls1117]

@rahulsharma11 sorry, i forget. you should also change the default setting here:
include/AlgThread.h (line 64, Mface m_face[3];)
this should work.

[rahulsharma11]

Hi @xcls1117 ,
Thanks for that point also.
I did that change but same result.:-(

Can you please just verify that only these changes would be sufficient by yourself? if possible?

[rahulsharma11]

Hi,
one more querry is that how can i change the resolution to say (640x480)?
There are parameters in demo.conf, VideoWidth and height that are set to 1280x720. I want to change the resolution to 640x480. If i change that then it throws error of assersion failed.
I can see that there is a scale parameter that gives 640x360 image size, but on imshow, the output image appears to be small and face detection baundry goes out of frame.
Any suggestion?