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contour
(redirected from Edge detection)

   Also found in: Dictionary/thesaurus, Medical, Legal, Encyclopedia, Wikipedia 0.01 sec.

contour

On a map, a line drawn to join points of equal height. Contours are drawn at regular height intervals; for example, every 10 m. The closer together the lines are, the steeper the slope. Contour patterns can be used to interpret the relief of an area and to identify land forms.

contour

In art, a line that defines a shape more three-dimensionally than an ordinary outline in drawing. By changing the thickness and intensity (darkness), a contour line can give the impression of texture, shape, form, and spatial relationships between objects. A contour drawing, or line drawing, is made up entirely of lines – no shading, tones, or textures are added.



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Edge detection process extracts the points of alternation between bars and spaces.
Then, edge detection is equivalent to look for a subdomain of S2 where the energy is small.
Photo is able to identify areas that should be shaded as one color and uses sophisticated edge detection to draw outlines.
 
 
 
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