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公开(公告)号：US11763421B2
公开(公告)日：2023-09-19
申请号：US17143995
申请日：2021-01-07
Applicant: Apple Inc.
Inventor： Chihsin Wu , David R. Pope , Sheng Lin , Amnon D. Silverstein
CPC classification number: G06T3/4007 , H04N23/88
Abstract: A foveated down sampling and correction (FDS-C) circuit for combined down sampling and correction of chromatic aberrations in images. The FDS-C circuit performs down sampling and interpolation of pixel values of a first subset of pixels of a color in a raw image using down sampling scale factors and first interpolation coefficients to generate first corrected pixel values for pixels of the color in a first corrected version of the raw image. The FDS-C circuit further performs interpolation of pixel values of a second subset of the pixels in the first corrected version using second interpolation coefficients to generate second corrected pixel values for pixels of the color in a second corrected version of the raw image. Pixels in the first subset are arranged in a first direction, pixels in the second subset are arranged in a second direction, and the down sampling scale factors vary along the first direction.
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Patent Agency Ranking
公开(公告)号：US20240029198A1
公开(公告)日：2024-01-25
申请号：US18230560
申请日：2023-08-04
Applicant: Apple Inc.
Inventor： Chihsin WU , David R. Pope , Sheng Lin , Amnon D. Silverstein
CPC classification number: G06T3/4007 , H04N23/88
Abstract: A foveated down sampling and correction (FDS-C) circuit for combined down sampling and correction of chromatic aberrations in images. The FDS-C circuit performs down sampling and interpolation of pixel values of a first subset of pixels of a color in a raw image using down sampling scale factors and first interpolation coefficients to generate first corrected pixel values for pixels of the color in a first corrected version of the raw image. The FDS-C circuit further performs interpolation of pixel values of a second subset of the pixels in the first corrected version using second interpolation coefficients to generate second corrected pixel values for pixels of the color in a second corrected version of the raw image. Pixels in the first subset are arranged in a first direction, pixels in the second subset are arranged in a second direction, and the down sampling scale factors vary along the first direction.
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公开(公告)号：US20230230199A1
公开(公告)日：2023-07-20
申请号：US17578127
申请日：2022-01-18
Applicant: Apple Inc.
Inventor： Sarvesh Swami , David R. Pope , Sheng Lin , Amnon D. Silverstein
CPC classification number: G06T3/4015 , G06T3/4007 , G06T5/20
Abstract: Embodiments relate to a multi-mode demosaicing circuit able to receive and demosaic image data in a different raw image formats, such as Bayer raw image format and Quad Bayer raw image format. The multi-mode demosaicing circuit demosaics Quad Bayer image data by interpolating a green channel of the image data along each of a plurality of directions, generating a gradient of the image data along each of the plurality of directions, modifying the interpolated green channels based on respective gradients to generate full-resolution green channel image data, which is combined with red and blue image data to generate the demosaiced image data. Interpolation is performed for non-green pixels based on neighboring green pixels along a specified direction, modified by a residual value based upon values of one or more nearby same-color pixels and a correlation between values of the same-color pixels and neighboring green pixels.
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公开(公告)号：US20220215506A1
公开(公告)日：2022-07-07
申请号：US17143995
申请日：2021-01-07
Applicant: Apple Inc.
Inventor： Chihsin Wu , David R. Pope , Sheng Lin , Amnon D. Silverstein
Abstract: A foveated down sampling and correction (FDS-C) circuit for combined down sampling and correction of chromatic aberrations in images. The FDS-C circuit performs down sampling and interpolation of pixel values of a first subset of pixels of a color in a raw image using down sampling scale factors and first interpolation coefficients to generate first corrected pixel values for pixels of the color in a first corrected version of the raw image. The FDS-C circuit further performs interpolation of pixel values of a second subset of the pixels in the first corrected version using second interpolation coefficients to generate second corrected pixel values for pixels of the color in a second corrected version of the raw image. Pixels in the first subset are arranged in a first direction, pixels in the second subset are arranged in a second direction, and the down sampling scale factors vary along the first direction.
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公开(公告)号：US11972538B2
公开(公告)日：2024-04-30
申请号：US17578127
申请日：2022-01-18
Applicant: Apple Inc.
Inventor： Sarvesh Swami , David R Pope , Sheng Lin , Amnon D. Silverstein
IPC: G06K9/00 , G06T3/4007 , G06T3/4015 , G06T5/20
CPC classification number: G06T3/4015 , G06T3/4007 , G06T5/20
Abstract: Embodiments relate to a multi-mode demosaicing circuit able to receive and demosaic image data in a different raw image formats, such as Bayer raw image format and Quad Bayer raw image format. The multi-mode demosaicing circuit demosaics Quad Bayer image data by interpolating a green channel of the image data along each of a plurality of directions, generating a gradient of the image data along each of the plurality of directions, modifying the interpolated green channels based on respective gradients to generate full-resolution green channel image data, which is combined with red and blue image data to generate the demosaiced image data. Interpolation is performed for non-green pixels based on neighboring green pixels along a specified direction, modified by a residual value based upon values of one or more nearby same-color pixels and a correlation between values of the same-color pixels and neighboring green pixels.
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公开(公告)号：US20240031540A1
公开(公告)日：2024-01-25
申请号：US17870456
申请日：2022-07-21
Applicant: Apple Inc.
Inventor： Chihsin Wu , David R. Pope , Sheng Lin , Amnon D. Silverstein
Abstract: A foveated down sampling (FDS) circuit for down sampling of pixels in images. The FDS circuit down samples a first subset of pixels of a same color in an image using first scaling factors to generate first down sampled pixels in a first down sampled version of the image. The FDS circuit further down samples a second subset of the first down sampled pixels of the same color using second scaling factors to generate second down sampled pixels of the same color in a second down sampled version of the image. Pixels from the first subset are arranged in a first direction, and pixels from the second subset are arranged in a second direction.
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