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PERCEPTUAL PREPROCESSING FILTER FOR VIEWING-CONDITIONS-AWARE VIDEO CODING
PERCEPTUAL PREPROCESSING FILTER FOR VIEWING-CONDITIONS-AWARE VIDEO CODING
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机译:用于查看条件的感知预处理过滤器-AARE视频编码
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摘要
A perceptual filter may be implemented to filter one or more spatial frequencies from a video signal that are below a contrast sensitivity limit of a viewer of the video signal. The perceptual filter may be configured to adapt one or more perceptual filter parameters on a pixel-basis based on, for example, content, viewing distance, display density, contrast ratio, display luminance, background luminance, and/or age of the viewer. Estimates of DC, amplitude, and contrast sensitivity of a video frame may be performed. A spatial cutoff frequency of the perceptual filter may be mapped to a contrast sensitivity. The perceptual filter may be used as a preprocessing step for a video encoder so as to lower an encoded bitrate. The oblique effect phenomena of the human visual system may be incorporated into the perceptual filter.
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