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REAL TIME TONE MAPPING OF HIGH DYNAMIC RANGE IMAGE DATA AT TIME OF PLAYBACK ON A LOWER DYNAMIC RANGE DISPLAY
REAL TIME TONE MAPPING OF HIGH DYNAMIC RANGE IMAGE DATA AT TIME OF PLAYBACK ON A LOWER DYNAMIC RANGE DISPLAY
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机译：在较低的动态范围显示上播放时，高动态范围图像数据的实时音调映射
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摘要
A converter can process image data from input HDR images in real time to compute new metadata about the brightness, contrast, color gamut and/or color volume for the image data to be displayed from each frame. Existing metadata can be ignored. The converter can combine the metadata for a current HDR frame with metadata for a plurality of immediately previous sequential frames to provide parameters for tone mapping. The converter uses these parameters, and characteristics about a lower dynamic range display which will receive output image data, to define a transfer function for converting the input HDR image data into output image data for display. The converter analyzes and tone maps HDR frames at a rate sufficient to allow output video to be generated at a desired frame rate while receiving the image data from frames of the input HDR video at an input frame rate.
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