How can i extract vertical lines from the print given?

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PP
PP 2017-2-11
评论： PP 2017-2-23
I want to extract only the verticle lines which might be present in the lip print given using only morphological operations. Is there any preprocessing required before doing so?

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Image Analyst
Image Analyst 2017-2-11
You can use bwareaopen() to get rid of the large blobs. Then get rid of horizontal lines using
windowWidth = 5; % Whatever...some odd number.
verticalLines = imerode(binaryImage, ones(windowWidth, 1));
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