Image analysis – Image enhancement or restoration – Image filter
Patent
1995-11-27
1999-04-20
Boudreau, Leo H.
Image analysis
Image enhancement or restoration
Image filter
382180, 382262, 382265, 382282, 348597, G06K 920, G06K 936, G06K 934
Patent
active
058964681
ABSTRACT:
Digital maps digitized by scanning paper maps are smoothed by identifying regions which should be of a uniform color, empirically selecting sets of colors which the pixels of a given region might have in the raw map, empirically determining the statistical probability of occurrence of pixels of each color of the selected set in the region, defining groups of connected pixels having colors within the selected set, and resetting the color of all the pixels in a group to a predetermined region color if, and only if, the pixels of the group satisfy the determined statistical probability of occurrence. The inventive method provides uniform coloring of the map where desired, without affecting the sharpness of small-print map annotations.
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Anderson Terry J.
Boudreau Leo H.
Hoch Jr. Karl J.
Mariam Daniel G.
Nortrhop Grumman Corporation
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