3.2 version doesn't support 4 channel color image
detections, unlike 3.1. Now, we don't call
CV_Error() if 4 channel image is given.
resolve #8326
Mat img = cvarrToMat((CvMat*)arr).clone();
- if( img.depth() != CV_8U || (img.channels() != 1 && img.channels() != 3) )
+ if( img.depth() != CV_8U || (img.channels() != 1 && img.channels() != 3 && img.channels() != 4) )
CV_Error( CV_StsUnsupportedFormat, "Only 8-bit grayscale or color images are supported" );
if( pattern_size.width <= 2 || pattern_size.height <= 2 )