COMPRESSING HIGH DYNAMIC RANGE IMAGES
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United States of America Patent
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May 14, 2015
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May 15, 2014
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Abstract
A method of compressing a high dynamic range original image to provide compressed image data for use with (i) a high dynamic range decoder for viewing the high dynamic range image and (ii) a reduced bit depth decoder for viewing an image of lower dynamic range which has been derived from the high dynamic range original image. The difference between the image of the high dynamic range original image and the lower dynamic range is measured and that difference information is compressed. Compressed image data is produced comprising the compressed image of the lower dynamic range and the compressed image data.
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