Method and apparatus for selectively adjusting the brightness of large regions of an image
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United States of America Patent
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Aug 10, 1993
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N/A
app pub date -
Jun 27, 1991
filing date -
Jun 27, 1991
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Abstract
The invention concerns a method for rendering scene information in images having a large dynamic range, i.e. sunny and shady areas. The method takes particular advantage of image segmentation and computations employed in compression of images for electronic still photography. In distinguishing large areas, the method selectively adjusts the brightness of all portions of the area without necessarily preserving contrast which avoids halo artifacts. Those portions in areas of intermediate size are subjected to a smoothing feature which avoids the production of artifacts in the form of a line at the boundary.
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