How do i remove all the open contours

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Chok Chuan
Chok Chuan 2015-4-30
回答： Chok Chuan 2015-5-1
In the picture attached, I have used canny edge detection I wanna get rid of those lines and open contours and want to retain only the small balls, closed contours how do i do it I am really desperate to do this please help me
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Chok Chuan
Chok Chuan 2015-4-30
the above CONTOUR LINES.fig is the result after I have used edge detection I want to know how to get the three ball like figure and remove all the unwanted open contoured lines. The big circle need not to be removed
Chok Chuan
Chok Chuan 2015-4-30
if you think i've used the wrong edging method I can show you a pic before I used the edge method, maybe you can tell me the appropriate way

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Chok Chuan
Chok Chuan 2015-5-1
Help is greatly appreciated

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