Brightness and contrast enhancement for video

    公开(公告)号:US11803947B2

    公开(公告)日:2023-10-31

    申请号:US16822961

    申请日:2020-03-18

    Abstract: Methods and systems to improve a visual perception of dark scenes in video. An example device includes one or more processors to receive a frame of video segmented into a plurality of sub-regions. A local luminance histogram is generated for each sub-region. A global luminance histogram is generated for the entire frame of video and a global tone mapping curve is generated based on the global luminance histogram. A tone mapping LUT is generated for each sub-region based on the global tone mapping curve and the corresponding local luminance histogram for the sub-region. The frame of video is then modified using the tone mapping LUTs generated for each sub-region and sent to an output device.

    BRIGHTNESS AND CONTRAST ENHANCEMENT FOR VIDEO

    公开(公告)号:US20200219238A1

    公开(公告)日:2020-07-09

    申请号:US16822961

    申请日:2020-03-18

    Abstract: Methods and systems to improve a visual perception of dark scenes in video. An example device includes one or more processors to receive a frame of video segmented into a plurality of sub-regions. A local luminance histogram is generated for each sub-region. A global luminance histogram is generated for the entire frame of video and a global tone mapping curve is generated based on the global luminance histogram. A tone mapping LUT is generated for each sub-region based on the global tone mapping curve and the corresponding local luminance histogram for the sub-region. The frame of video is then modified using the tone mapping LUTs generated for each sub-region and sent to an output device.

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