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How to set a pixel count threshold?

Posted by PeterChang on Jan 27, 2014; 6:07pm
URL: http://imagej.273.s1.nabble.com/How-to-set-a-pixel-count-threshold-tp5006301.html

I want to exclude any dots or round spots on a image and only keep elongated pixels. For example wrinkles.
DSC04556f.jpg

i want to keep just the long lines of black pixels and exclude the round dots.

Anyway I can do this?