Tone mapping adaptation for saturation control
AssigneeInterDigital VC Holdings, Inc.
InventorsFrancois CELLIER, Patrick LOPEZ, Yannick OLIVIER, David TOUZE
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Abstract
A system and methods is provided for performing, by a processor, an initial tone mapping function on a first image to produce a second image. The first and second images are of different dynamic ranges. The method also includes applying, by the processor, a second tone mapping function to the second image when it contains any saturated portions. The second tone mapping function lowers luminance by a first fraction. The overall luminance of the second image is also determined and a fine tuning filter is applied when at least portions of said second image contain areas darker than an amount.
Claims21
A method comprising:
- applying an initial tone mapping function on a first image to produce a second image wherein said first and second images are of different dynamic ranges;
- applying a second tone mapping function to said second image when it contains any saturated portions;
- wherein said second tone mapping function lowers luminance by a first fraction;
- and
- determining overall luminance of said second image and applying a fine tuning filter
- when at least portions of said second image contain areas darker than an amount, wherein said fine tuning filter increases the overall luminance of the second image by a second fraction.
A system comprising at least one processor configured to:
- perform an initial tone mapping function on a first image to produce a second image wherein said first and second images are of different dynamic ranges;
- apply a second tone mapping function to said second image when it contains any saturated portions;
- wherein said second tone mapping function lowers luminance by a first fraction;
- and
- determine overall luminance of said second image and applying a fine tuning filter when at least portions of said second image contain areas darker than an amount, wherein said fine tuning filter increases the overall luminance of the second image by a second fraction.
Dependencies are inferred from the claim text.