How to apply a modified matched filter to an image?

I am trying to do retial blood vessel extraction and in that process I need to apply a gaussian filter for |x| ≤ 3σ, |y| ≤ L for a retinal image.

The image will be filtered by g (x, y) in eight directions. Each of the eight filtering responses will be thresholded to generate a vessel map. Finally, the eight vessel maps are fused through a logical OR operation.

Can anyone suggest me how to do it?

Thank you

[yanqi liu]

yes，sir，may be upload some image to analysis

Answer 1

[alireza mohsenpour]

Hey Krishna

I have the same project to do. have you got answer from somewhere else on this?