Method and apparatus for enhancing image or video quality using an exposure aware scene adaptive global brightness contrast
AssigneeTexas Instruments Incorporated
InventorRajesh Narasimha
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Abstract
A method and apparatus for enhancing at least one of video and image quality using an exposure aware scene adaptive global brightness contrast. The method includes determining if gain control is needed utilizing Gamma corrected histogram and ancillary data, if gain control is not required, computing a set of scene adaptive tone points and blending with information from histogram equalization if needed, if gain control is required, estimating gain value and utilizing the gain value in computing the gain table, and accordingly, generating a look-up table for enhancing global brightness contrast utilizing the gain table, the tone table and the information from histogram equalization.
Claims9
A method for enhancing at least one of video and image quality using an exposure aware scene adaptive global brightness contrast, comprising:
- determining if gain control is needed utilizing Gamma corrected histogram and ancillary data;
- if gain control is not required, computing a set of scene adaptive tone points and blending with information from histogram equalization if needed, if gain control is required, estimating a gain value and utilizing the gain value in computing the gain table, and
- accordingly, generating a look-up table for enhancing global brightness contrast utilizing the gain table, a tone table and the information from histogram equalization.
An apparatus, comprising
- determining if gain control required utilizing Gamma corrected histogram and ancillary data;
- means for computing a set of scene adaptive tone points and means for blending with the information from histogram equalization if gain control is not needed, and means for estimating a gain value and utilizing the gain value in computing gain table utilized if gain control is needed;
- and
- means for generating a look-up table for enhancing global brightness contrast utilizing the gain table, a tone table and the information from histogram equalization.
A non-transitory computer-readable storage medium with an executable program stored thereon, wherein the program instructs a microprocessor to perform a method for enhancing video/image quality using an exposure aware scene adaptive global brightness contrast, comprising:
- determining if gain control is needed utilizing Gamma corrected histogram and ancillary data;
- if gain control is not required, computing a set of scene adaptive tone points and blending with information from histogram equalization if needed, if gain control is required, estimating a gain value and utilizing the gain value in computing the gain table, and
- accordingly, generating a look-up table for enhancing global brightness contrast utilizing the gain table, a tone table and the information from histogram equalization.
Dependencies are inferred from the claim text.