作者：gnuhpc
出处：http://www.cnblogs.com/gnuhpc/
/*
Converts a BGR image to HSV colorspace
@param bgr image to be converted
@return Returns bgr converted to a 3-channel, 32-bit HSV image with
S and V values in the range [0,1] and H value in the range [0,360]
*/
IplImage* bgr2hsv( IplImage* bgr )
{
IplImage* bgr32f, * hsv;
bgr32f = cvCreateImage( cvGetSize(bgr), IPL_DEPTH_32F, 3 );
hsv = cvCreateImage( cvGetSize(bgr), IPL_DEPTH_32F, 3 );
cvConvertScale( bgr, bgr32f, 1.0 / 255.0, 0 );
cvCvtColor( bgr32f, hsv, CV_BGR2HSV );
cvReleaseImage( &bgr32f );
return hsv;
}