The results of image edge detection directly affects the subsequent image processing operations. Effectively extracting the information carried by the image target is the main purpose of the image edge detection. In order to realize the extraction of a target outline

an image edge detection method based on a Euclidean distance graph is proposed. The Euclidean distance between points in the image is calculated

and the distance graph is obtained. The scenery outside the outline is well described in the graph. The scenery outline can be effectively extracted by using an improved Canny operator for edge detection. Compared with other general edge detection algorithms

the method can effectively realize the detection of a target's outline. Because small and trivial details are suppressed

the method gives a better basis for further image target outline recognition.