How can I remove the border line from the image ?

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sufian ahmed
sufian ahmed 2017-8-28
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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回答（1 个）

Image Analyst
Image Analyst 2017-8-28
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
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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