A multiscale bi-Gaussian filter for adjacent curvilinear structu...

The intensity or gray-level derivatives have been widely used in image segmentation and enhancement. Conventional derivative filters often suffer from an undesired merging of adjacent objects, due to their intrinsic usage of an inappropriately broad Gaussian kernel; as a result neighboring structures cannot be properly resolved. To avoid<br />this problem, we propose to replace the low-level Gaussian kernel with a bi-Gaussian function, which allows independent selection of scales on foregr