How can I remove the border line from the image ?

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sufian ahmed 2017-8-28

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评论： sufian ahmed 2017-8-29

I have an image with some character. After the canny edge detection i get the digits with some border line. so I want to remove all the border line and only extract the digits. How can i do that ?

Here is the output of canny Image:

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Answer 1

Image Analyst 2017-8-28

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编辑：Image Analyst 2017-8-28

Label the image with bwlabel. Then use regionprops to get the Euler number of each blob. "Hollow" blobs will have an Euler number of 0 or less, while "stick-like" blobs will have an Euler number of 1. Use propfilt() to extract only those with an Euler number of 1.

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sufian ahmed 2017-8-29

@image analyst i want to remove the border line. when i extract the stick-like blobs for example : "1" then border lines also have the same Euler number i think. so how can i distinguish ?

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