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Definition of "key point detection" |
a technique usually employed in specialized linear or morphological filters designed for measuring graylevel changes in several directions. A key point is an isolated image point corresponding to a peculiar physical or geometrical phenomenon in the scene from which the image arises; it can be for example a corner, a line termination, a junction, a bright or dark spot,etc. Key points are distinguished from edges by two properties: they are sparse and display strong gray-level variations in two or more directions (while edge points are grouped into lines, and have gray-level variations essentially in the direction normal to that line). |
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