SYSTEMS AND METHODS FOR REDUCING FIXED PATTERN NOISE IN IMAGE DATA

    公开(公告)号:US20230336888A1

    公开(公告)日:2023-10-19

    申请号:US18330973

    申请日:2023-06-07

    申请人: Apple Inc.

    IPC分类号: H04N25/67

    CPC分类号: H04N25/67

    摘要: The present disclosure generally relates to systems and methods for image data processing. In certain embodiments, an image processing pipeline may be configured to receive a frame of the image data having a plurality of pixels acquired using a digital image sensor. The image processing pipeline may then be configured to determine a first plurality of correction factors that may correct each pixel in the plurality of pixels for fixed pattern noise. The first plurality of correction factors may be determined based at least in part on fixed pattern noise statistics that correspond to the frame of the image data. After determining the first plurality of correction factors, the image processing pipeline may be configured to configured to apply the first plurality of correction factors to the plurality of pixels, thereby reducing the fixed pattern noise present in the plurality of pixels.

    Image processing system and method of operating the same

    公开(公告)号:US11962923B2

    公开(公告)日:2024-04-16

    申请号:US17683000

    申请日:2022-02-28

    申请人: SK hynix Inc.

    发明人: Cheol Jon Jang

    IPC分类号: H04N25/67 H04N25/671

    CPC分类号: H04N25/671

    摘要: An image processing device includes a target pixel detector configured to detect a plurality of target pixels in which noise is generated among a plurality of pixels included in an image sensor. The image processing device also includes a target pixel corrector configured to change target pixel values, which are pixel values of the plurality of target pixels, by using average pixel values of neighboring pixels included in a preset range based on a position of each of the plurality of target pixels. The image processing device further includes a target pixel compensator configured to compensate for the target pixel values by using an accumulation value obtained by accumulating values corresponding to a decimal fraction part of the average pixel values.

    FIXED PATTERN NOISE REDUCTION IN IMAGE SENSORS OPERATED WITH PULSED ILLUMINATION

    公开(公告)号:US20240073556A1

    公开(公告)日:2024-02-29

    申请号:US18451754

    申请日:2023-08-17

    摘要: Fixed pattern noise (FPN) reduction techniques in image sensors operated with pulse illumination are disclosed herein. In one embodiment, a method includes, during a first sub-exposure period of a frame, (a) operating a first tap of a pixel to capture a first signal corresponding to first charge at a first floating diffusion, the first charge corresponding to first light incident on a photosensor, and (b) operating a second tap of the pixel to capture a first parasitic signal corresponding to FPN at a second floating diffusion. The method further includes, during a second sub-exposure period of the frame, (a) operating the second tap to capture a second signal corresponding to second charge at the second floating diffusion, the second charge corresponding to second light incident on the photosensor, and (b) operating the first tap to capture a second parasitic signal corresponding to FPN at the first floating diffusion.