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I am trying to speed up face detection in OpenCV. I have only one face I need to detect (I know this face from before). Does having this information speeds up the face detection? How can I use this?

I have considered some ideas such as using a smaller XML file since I am only detecting one face.

Thx

I have a 10 bit grayscale image that I like to use the cvSobel function. The documentation is not clear if it can accept 16 bit grayscale images. When I try to make this work, I get an exception from OpenCV.

In my VC++ when I look at the function, this is what I am seeing.

     CVAPI(void) cvSobel( const CvArr* src, CvArr* dst,
                int xorder, int yorder,
                int aperture_size CV_DEFAULT(3));

I tried to make destination 32F but still crash.