How can I extend an edge?

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Tomas
Tomas 2012-11-2
Hi
I need to find the surrounding edge of a region. I used these lines but it don't give me a good result . log find an edge belonging to the region when I need to find the edge that surrounds the region. Is there a matlab function that extends the edge given by log 1 or 2 pixels
I=imread('image.jpg');
edg = edge(I,'log',0);
thankx

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回答（1 个）

Image Analyst
Image Analyst 2012-11-2
No.
  1 个评论
Tomas
Tomas 2012-11-2
thank you for your reply, is it possible to dilate the edge to the outside of the region. How can i correct these lines?
NHOOD = [ 0 1 0; 1 1 1; 0 1 0];
SE = strel('arbitrary', NHOOD);
Dilate = imdilate(Edge, SE);

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