Saturday, July 21, 2007

Opening, Closing

Opening smooths the contour of an object , breaks narrow isthmuses, and eliminates thin protrusions. Opening A by B is the erosion of A by B, followed by a dilation of B.
Closing also tends to smooth sections of contours but, as opposed to opening, it generally fuses narrow breaks and long thin gulfs, eliminates small holes, and fills gaps in contour. Closing of A by B is the dilation of A by B, followed by erosion of B.

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