I am looking for information on doing this color conversion. I did find this kernel online which looks pretty straight forward.
The signature function is
extern “C” void convert_to_hsv_wrapper(uchar4 *rgb, float4 *hsv, int width, int height)
When I load an RGB image in to a vx_image I use vxImagePatch to get a pointer to the base data and cast this to a uchar4 * and pass it to the kernel but the thing just blows up. Any ideas?