# Gaussian derivative with orientation

Hey all,

I am working out an idea from a paper which talks about taking the Gaussian derivative in 8 orientations. In summary, my question is: How can I do this using OpenCV?

I assume the Gaussian derivative means a difference of Gaussian in a certain orientation. How can I acquire the Gaussian filter in these orientations to use in a convolution? Or is it easier to rotate the image instead?

Best regards, Hans