ENCODING, DECODING, AND REPRESENTING HIGH DYNAMIC

专利名称：ENCODING, DECODING, AND

REPRESENTING HIGH DYNAMIC RANGEIMAGES

发明人：JIA, Wenhui,TEN, Arkady,NINAN, Ajit,WARD,

Gregory John,WANG, Gaven

申请号：EP18165945.9申请日：20120416公开号：EP3376749A1公开日：20180919

专利附图：

摘要：Techniques are provided to encode and decode image data comprising a tonemapped (TM) image with HDR reconstruction data in the form of luminance ratios andcolor residual values. In an example embodiment, luminance ratio values and residualvalues in color channels of a color space are generated on an individual pixel basis basedon a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that

comprises one or more color alterations that would not be recoverable from the TMimage with a luminance ratio image. The TM image with HDR reconstruction data derivedfrom the luminance ratio values and the color-channel residual values may be outputtedin an image file to a downstream device, for example, for decoding, rendering, and/orstoring. The image file may be decoded to generate a restored HDR image free of thecolor alterations.

申请人：Dolby Laboratories Licensing Corporation

地址：1275 Market Street San Francisco, CA 94103 US

国籍：US

代理机构：Dolby International AB Patent Group Europe

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