The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Using balloon snake algorithm to get the contour in an image, the contour will stay on the inner darker place (that is in the relatively minimum energy) of the image. To solve this problem, we usually use median filter or Gaussian filter as the tool of softening brightness of the image. These two filters will blur the edges of the object, thus increase the difficulty to find the real contour of the...