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公开(公告)号：US20230138779A1
公开(公告)日：2023-05-04
申请号：US17518437
申请日：2021-11-03
Applicant: Apple Inc.
Inventor： Kaiming Liu , Maxim Smirnov , William T. Warner , David Pope , Hui Chao , Jason Holloway
Abstract: Embodiments of the present disclosure relate performing registration of a first image to a second image where the first image is undistorted to linear space before applying a geometric transformation matrix to modify the first image to align with the second image. The geometric transformation matrix may be a linear matrix that causes the undistorted version of the first image to make translation movement, rotational movement or both. The undistorted and modified first image is then reverted back to nonlinear distorted space. Then the reverted first image may be warped to better align with the second image for fusing with the second image. In this way, visual distortions in the fused image such as wobbling may be reduced or eliminated.
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公开(公告)号：US20240297949A1
公开(公告)日：2024-09-05
申请号：US18117065
申请日：2023-03-03
Applicant: Apple Inc.
Inventor： Muge Wang , William T. Warner , David R. Pope
CPC classification number: H04N1/6019 , G06T3/18 , G06T3/4007 , G06T5/92 , G06T7/90 , G06V10/56 , G06V10/60 , H04N9/69 , G06T2207/10024
Abstract: An image processing circuit for performing local tone mapping (LTM) after image warping. The image processing circuit includes a warping circuit that warps an input image to generate a warped image, and a LTM circuit coupled to the warping circuit. The LTM circuit determines an input color component value for a color component of a pixel in a version of the warped image, determines an output color component value for the color component of the pixel, based on mapping of coordinates of pixels in the warped image to coordinates of pixels in the input image, determines a gain value for the pixel as a ratio of the output color component value relative to the input color component value, and adjusts color component values for color components of the pixel using the gain value to generate adjusted color component values for the color components of the pixel in an output image.
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公开(公告)号：US12260532B2
公开(公告)日：2025-03-25
申请号：US17518437
申请日：2021-11-03
Applicant: Apple Inc.
Inventor： Kaiming Liu , Maxim Smirnov , William T. Warner , David Pope , Hui Chao , Jason Holloway
Abstract: Embodiments of the present disclosure relate performing registration of a first image to a second image where the first image is undistorted to linear space before applying a geometric transformation matrix to modify the first image to align with the second image. The geometric transformation matrix may be a linear matrix that causes the undistorted version of the first image to make translation movement, rotational movement or both. The undistorted and modified first image is then reverted back to nonlinear distorted space. Then the reverted first image may be warped to better align with the second image for fusing with the second image. In this way, visual distortions in the fused image such as wobbling may be reduced or eliminated.
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公开(公告)号：US11334961B2
公开(公告)日：2022-05-17
申请号：US16987272
申请日：2020-08-06
Applicant: Apple Inc.
Inventor： Maxim Smirnov , William T. Warner , David R. Pope , Manching Ko
Abstract: Embodiments relate to circuitry for warping image pyramids for image fusion. An image fusion circuit receives captured images, and generates image pyramids corresponding to the received images to be used for image fusion. A warping circuit warps the first image pyramid based upon one or more warping parameters to align the first image pyramid to the second image pyramid. The warping circuit is a multi-scale warping circuit configured to warp each level of the first image pyramid, using a first warping engine that warps a base level of the image pyramid, and at least one addition warping engine that warps a plurality of scaled levels of the image pyramid in parallel with the first warping engine.
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