IMAGE SIGNAL PROCESSOR SUPPORTING COMPENSATION OPERATION FOR SATURATED PIXEL AND METHOD OF OPERATING THE SAME

    公开(公告)号:US20240147081A1

    公开(公告)日:2024-05-02

    申请号:US18491125

    申请日:2023-10-20

    CPC classification number: H04N23/76 H04N23/71 H04N23/843

    Abstract: An image signal processor configured to receive a digital signal from an image sensor includes a saturation detecting unit configured to classify each of a plurality of pixels, corresponding to the digital signal, as either a saturated pixel or a non-saturated pixel and to select a compensable pixel among the saturated pixels, a color processing unit configured to estimate channel values for each color for each of the plurality of pixels corresponding to the digital signal and to perform a correlation calculation between the channel values for each color, and a saturation compensation unit configured to select at least one color-transfer pixel, among the non-saturated pixels, based on the correlation calculation value between the channel values for each color and to perform a compensation operation on the compensable pixel based on the at least one color-transfer pixel. The image signal processor may recover information, lost due to saturation, through a color-transfer method using a correlation between colors. Accordingly, a dynamic range may be extended.

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