HOw can I use Morphological commands for boundary?

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Faranak
Faranak 2014-1-21
评论： Faranak 2014-1-21
Hello All,I want to remove boundary around an image and I want to know how can morphological commands help me? Which command of morphological commands should I use? I have attached the image that I want to remove the boundary around it.

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回答（1 个）

Image Analyst
Image Analyst 2014-1-21
编辑：Image Analyst 2014-1-21
Try imerode.
  1. threshold to get a binary image.
  2. call imerode
  3. subtract from original binary image
  4. erase boundary: grayImage(binaryImage) = 0
If it doesn't do what you want, then attach your code.
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Image Analyst
Image Analyst 2014-1-21
Explain in more detail what you consider the "boundaries" of that image to be.
Faranak
Faranak 2014-1-21
Boundaries around the image,which are highlighted,not inside the image,just around the image. I applied canny to the image and after that I used 'bwconncomp' so that I can find the connected components and then I erased the largest one,but still it has the boundary.and also in this method that I tried I don't know how to back to gray scale from binary(canny).
in the attachment the image 2 is the canny of the main picture,and the image named 3 is the one that I erased the largest connected component. I want to remove the other largest component which appears to be the boundary of the image.

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