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US 2012/0256943 A1Published application
Image Range Expansion Control Methods and Apparatus
AssigneeDolby Laboratories Licensing Corporation
InventorsRobin Atkins, Steve Margerm
Life of this patent
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Abstract
Image data is adjusted for display on a target display. Maximum safe expansions for one or more attributes of the image data are compared to maximum available expansions for the attributes. An amount of expansion is selected that does not exceed either of the maximum safe expansion and the maximum available expansion. Artifacts caused by over expansion may be reduced or avoided.
Claims14
A method for image processing, the method comprising:
- obtaining image data and metadata associated with the image data;
- processing the metadata with information characterizing a target display to determine a maximum safe expansion for an attribute of the image data and a maximum available expansion for the attribute of the image data;
- and,
- processing the image data to expand the attribute of the image data by the lesser of the maximum safe expansion and the maximum available expansion.
1 more element
Image processing apparatus comprising:
- a decoder configured to extract image data and metadata associated with the image data from a signal;
- a controller configured to process the metadata with information characterizing a target display to determine a maximum safe expansion for an attribute of the image data and a maximum available expansion for the attribute of the image data and to set an expansion amount equal to the smaller of the maximum safe expansion and the maximum available expansion;
- and
- an expander configured to expand the attribute of the image data by the expansion amount to yield modified image data.
1 more element
Dependencies are inferred from the claim text.