Problems with Face detection
Hello all! I use Viola-Jones method for face detection in OpenCV, but, when the face is lit half (one half of the face is lit, the other is darkened) face is not detected. Could any one suggest any solution to this problem?
equalizeHist, CLAHE might help.
like @berak suggested, you need to apply color equalization. Keep in mind that training a new classifier with the half illuminated faces could also help in your case. It is a known problem of the VJ algorithm, as far as the trained models, that there is a need of a diffuse lighting.
there' s a good one: CLAHE
Thanks to all, I will try to use methods of Histogram Equalizationn