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HOw can I use Morphological commands for boundary?

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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.

Answers (1)

Image Analyst
Image Analyst on 21 Jan 2014
Edited: Image Analyst on 21 Jan 2014
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.
Image Analyst
Image Analyst on 21 Jan 2014
Explain in more detail what you consider the "boundaries" of that image to be.
Faranak on 21 Jan 2014
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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