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Encoding, Decoding and Representing High Dynamic Range Images

  • US 20080192819A1
  • Filed: 11/24/2004
  • Published: 08/14/2008
  • Est. Priority Date: 04/23/2004
  • Status: Active Grant
First Claim
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1. A method for encoding high dynamic range image data having an initial dynamic range, the method comprising:

  • obtaining tone map data corresponding to the high dynamic range image data, the tone map data having a reduced dynamic range lower than the initial dynamic range;

    computing ratio data, the ratio data comprising ratios of values in the high dynamic range image data and corresponding values in the tone map data;

    generating high dynamic range information based on the ratio data;

    generating tone map information based on the tone map data; and

    ,storing the high dynamic range information and the tone map information in a data structure.

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