Method and apparatus for converting low dynamic range video to high dynamic range video
First Claim
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1. A method for converting a first dynamic range video to a second dynamic range video, comprising providing image processing electronics configured to:
- receive the first dynamic range video;
generate one or more breathing parameters of a current frame from temporal information and spatial information of the current frame and one or more previous frames of the first dynamic range video;
determining one or more mapping functions according to the generated breathing parameters of the current frame and one or more spatial criteria;
determining one or more weights for each pixel of the current frame corresponding to the determined mapping functions;
converting a pixel of the current frame to a converted pixel according to the determined mapping functions and corresponding weights; and
repeating the conversion for all pixels of the current frame to form a converted frame in the second dynamic range video.
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Abstract
A method and apparatus for converting a standard dynamic range (SDR) video to a high dynamic range (HDR) video. The conversion is adaptive and takes both spatial and temporal information of a current frame and previous frames into consideration such that the majority of pixels falls into the most sensitive regions of human eyes in the target dynamic range, while at the same time, the continuity of luminance is maintained in temporal domain to prevent flickering.
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12 Claims
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1. A method for converting a first dynamic range video to a second dynamic range video, comprising providing image processing electronics configured to:
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receive the first dynamic range video; generate one or more breathing parameters of a current frame from temporal information and spatial information of the current frame and one or more previous frames of the first dynamic range video; determining one or more mapping functions according to the generated breathing parameters of the current frame and one or more spatial criteria; determining one or more weights for each pixel of the current frame corresponding to the determined mapping functions; converting a pixel of the current frame to a converted pixel according to the determined mapping functions and corresponding weights; and repeating the conversion for all pixels of the current frame to form a converted frame in the second dynamic range video. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for converting a first dynamic range video to a second dynamic range video, configured to:
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receive the first dynamic range video; generate one or more breathing parameters of a current frame from temporal information and spatial information of the current frame and one or more previous frames of the first dynamic range video; determining one or more mapping functions according to the generated breathing parameters of the current frame and one or more spatial criteria; determining one or more weights for each pixel of the current frame corresponding to the determined mapping functions; converting a pixel of the current frame to a converted pixel according to the determined mapping functions and corresponding weights; and repeating the conversion for all pixels of the current frame to form a converted frame in the second dynamic range video.
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Specification