Edge Detection
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Edge detection is the name for a set of mathematical methods which aim at identifying points in a digital image at which the luminous intensity|image brightness changes sharply or, more formally, has discontinuities. The points at which image brightness changes sharply are typically organized into a set of curved line segments termed edges. The same problem of finding discontinuities in 1D signals is known as step detection and the problem of finding signal discontinuities over time is known as change detection. Edge detection is a fundamental tool in image processing, machine vision and computer vision, particularly in the areas of feature detection (computer vision)|feature detection and feature extraction.
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