/// <summary>
/// Compute the descriptor given the image and the point location
/// </summary>
/// <param name="image">The image where the descriptor will be computed from</param>
/// <param name="mask">The optional mask, can be null if not needed</param>
/// <param name="keyPoints">The keypoint where the descriptor will be computed from. The order of the keypoints might be changed unless the GPU_SURF detector is UP-RIGHT.</param>
/// <returns>The image features founded on the keypoint location</returns>
public GpuMat ComputeDescriptorsRaw(GpuMat image, GpuMat mask, GpuMat keyPoints)
{
GpuMat descriptors = new GpuMat();
ContribInvoke.cudaSURFDetectorCompute(_ptr, image, mask, keyPoints, descriptors, true);
return(descriptors);
}