Boundary extraction of watershed is an important step in forest landscape research.

The dynamic erosion operation and small structural element are applied in boundary extraction.

A method on boundary extraction based on image segmentation and neighborhood analysis is proposed for extracting rice boundary information from remote sensing images.

Study of stone detection method based on edge extraction and track;

To detect a center of laser spots formed by many laser tubes at an open environment,two threshold division and morphologic filter were considered based on the identifying principle of human eye vision,and a novel method of edge extraction of laser spot was presented.

In the process of image pre-pro-cessing,respectively to processing images by enlarge,gray,binarization,edge extraction.

Authors introduce a new algorithm which can normalize digital images with image moments and image edge detection.

Aiming at the limitations of the huge waste of time in traditional GVF Snake,a novel contour extraction of objects method based on GVF Snake and graph cuts is proposed.

To solve the problem,this paper proposes an efficient model combing double-edge extraction with decomposition of mixed pixels,the accuracy and applicability of which is attested by computing lake areas of northwestern China using AVHRR images.