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Untitled edit
It seems important to discuss why it is called "opening". ie. what is it opening?
Also, the line "removes small objects" should be qualified with a definition of an "object", ie. is it a white pixel or a black pixel?
I'm not so sure of these myself, hence I didn't add anything. 74.76.196.163 (talk) 15:02, 4 October 2008 (UTC)