I am working with Gabor filter with level set method here. As you known, gabor filter gave many filter output. Some of them is not necessary. Could you suggest to me some method that can choose best filter ouput that satisfy maximum the difference between object (zebra) and background that are separated by a contour (white circle)as figure. Thank you. Now, I am working in image segmentation, hence, these best filter outputs will give more accuracy
I'd say you should try to use a template matching method. Your eyes see a star, but it doesn't really exist as it has the same colour as the background. it's just your brain trying to complete a shape.
As the knowledge of the star shape comes from you and not from the image itself, look for methods using this kind of prior.