Reduce noise/improve shapes from an Image

Question

With imagesegmentation I segmented objects from a webcam. But because of the bad light I get a lot of noise in the picture. I want now to improve the shape of the found objects. The only method i found is image opening and closing but the result is no as good as I wished. Does anyone know some other methods?

In this folder I have the orginal image after the segmentation, the image after closing, and a picture of what kind of picture I'm looing for.

Thanks in advance

Answer 1

You could try the opening-closing combination operator. This provides a better smoothing of the shapes. Further more varying the radii of opening and closing (called the ASF - alternating sequential filtering) produces smoother results. There are a few demos online that use fourier desciptors. Its also important to choose a good shape of structuring elements, since your closing seems to close convex holes in the image.

Answer 2

If it is salt/pepper noise, a simple median filter may be better.