How can i get coordinate set of edges detected by canny edge detector?Give me the appropriate working code for it please.

i m working on matlab for moving object detection from real time video/images.i am simulating frog visual mechanism to detect moving object.i have to firstly smooth the image then to detect edges of object of interest and get coordinate set of edges and then to calculate entropy of pixels to determine which is moving object and which is not.

[shikha mangal]

hii,thanks Mr.Walter Roberson for your response but i cant found the solution of my problem..i have to get coordinates of the edges detected from the image by applying edge detector.kindly help me with this..i will be highly greatful.

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/images/ref/edge.html

[Walter Roberson]

The coordinates of the edges found by canny edge detector are the coordinates of the non-zero values in the result of applying canny. You can locate the non-zero values by using find()

[jiyo]

Dear Mr.Robertson, I would like an ordered pair of coordinates based on the shape of edge. Is it possible to get such ordered pair? Ordered in the sense, the pixel coordinates follow the shape of the object which is represented by the edge.

[Walter Roberson]

Use regionprops() and ask for the 'PixelIdxList' . Or better yet, use one of the boundary tracing functions.