Hi all; In opencv document: "Gaussian kernel standard deviation in Y direction; if sigmaY is zero, it is set to be equal to sigmaX, if both sigmas are zeros, they are computed from ksize.width and ksize.height, respectively (see “getGaussianKernel” for details); to fully control the result regardless of possible future modifications of all this semantics, it is recommended to specify all of ksize, sigmaX, and sigmaY."
But if i want:
- second derivate along x
- second derivate along y
- Thrid derivate along x.
............ How to do??? By the way,thanks your help.