OVERLAPPED CURVE MAPPING FOR HISTOGRAM-BASED LOCAL TONE AND LOCAL CONTRAST

    公开(公告)号:US20220180486A1

    公开(公告)日:2022-06-09

    申请号:US17114480

    申请日:2020-12-07

    Inventor: Ying-Ru Chen

    Abstract: Methods and apparatuses are disclosed herein for performing tone mapping and/or contrast enhancement. In some examples, a block mapping curve is low-pass filtered with block mapping curves of surrounding blocks to form a smoothed block mapping curve. In some examples, overlapped curve mapping of block mapping curves, including smoothed block mapping curves, is performed, including weighting, based on a pixel location, block mapping curves of a group of blocks to generate an interpolated block mapping curve and applying the interpolated block mapping curve to a pixel to perform ton mapping and/or contrast enhancement.

    OVERLAPPED CURVE MAPPING FOR HISTOGRAM-BASED LOCAL TONE AND LOCAL CONTRAST

    公开(公告)号:US20220292653A1

    公开(公告)日:2022-09-15

    申请号:US17830030

    申请日:2022-06-01

    Inventor: Ying-Ru Chen

    Abstract: Methods and apparatuses are disclosed herein for performing tone mapping and/or contrast enhancement. In some examples, a block mapping curve is low-pass filtered with block mapping curves of surrounding blocks to form a smoothed block mapping curve. In some examples, overlapped curve mapping of block mapping curves, including smoothed block mapping curves, is performed, including weighting, based on a pixel location, block mapping curves of a group of blocks to generate an interpolated block mapping curve and applying the interpolated block mapping curve to a pixel to perform ton mapping and/or contrast enhancement.

    Overlapped curve mapping for histogram-based local tone and local contrast

    公开(公告)号:US11354788B1

    公开(公告)日:2022-06-07

    申请号:US17114480

    申请日:2020-12-07

    Inventor: Ying-Ru Chen

    Abstract: Methods and apparatuses are disclosed herein for performing tone mapping and/or contrast enhancement. In some examples, a block mapping curve is low-pass filtered with block mapping curves of surrounding blocks to form a smoothed block mapping curve. In some examples, overlapped curve mapping of block mapping curves, including smoothed block mapping curves, is performed, including weighting, based on a pixel location, block mapping curves of a group of blocks to generate an interpolated block mapping curve and applying the interpolated block mapping curve to a pixel to perform ton mapping and/or contrast enhancement.

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