图像内轮廓填充通常称为孔洞填充，主要用于目标提取。不带任何条件的内轮廓填充，在目标密度很大时，可能导致错误填充。一种典型情况，当多个目标粘连，并 且形成环状时，简单的内轮廓填充会将环状内部背景部分误认为目标空洞进行错误填充。这种错误对于目标分割和提取是非常致命的。-Commonly referred to within the outline of the image to fill the holes filled, mainly for object extraction. Fill in the outline without any conditions in the target density is large, it may result in an error filled. A typical case, when a plurality of target adhesions and form a ring, when simple will ring inside the inner contour filling the background portion mistaken for error filling empty goal. This error for object segmentation and extraction is very deadly.