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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：US11936992B2
公开(公告)日：2024-03-19
申请号：US17578055
申请日：2022-01-18
Applicant: Apple Inc.
Inventor： Sarvesh Swami , David R Pope , Sheng Lin
CPC classification number: H04N23/843 , H04N9/67 , H04N23/80
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 comprises different circuitry for demosaicing different image formats that access a shared working memory. In addition, the multi-mode demosaicing circuit shares memory with a post-processing and scaling circuit configured to perform subsequent post-processing and/or scaling of the demosaiced image data, in which the operations of the post-processing and scaling circuit are modified based on the original raw image format of the demosaiced image data to use different amounts of the shared memory, to compensate for additional memory utilized by the multi-mode demosaicing circuit when demosaicing certain types of image data.
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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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公开(公告)号：US11656457B2
公开(公告)日：2023-05-23
申请号：US17880003
申请日：2022-08-03
Applicant: Apple Inc.
Inventor： Zahra Sadeghipoor Kermani , Sheng Lin , Emmanuel Piuze Phaneuf , Ryan Joseph Dunn , Joachim Michael Deguara , Farhan A. Baqai
CPC classification number: G02B27/005 , G06T5/006
Abstract: In one implementation, a method includes obtaining an image. The method includes splitting the image to produce a high-frequency component image and a low-frequency component image. The method includes downsampling the low-frequency component image to generate a downsampled low-frequency component image. The method includes correcting color aberration of the downsampled low-frequency component image to generate a color-corrected downsampled low-frequency component image. The method includes upsampling the color-corrected downsampled low-frequency component image to generate a color-corrected low-frequency component image. The method includes combining the color-corrected low-frequency component image and the high-frequency component image to generate a color-corrected version of the image.
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公开(公告)号：US11589035B1
公开(公告)日：2023-02-21
申请号：US17578334
申请日：2022-01-18
Applicant: Apple Inc.
Inventor： Sheng Lin
Abstract: Embodiments relate to correcting pixels of images captured using a quadra image sensor. A defect detection circuit analyzes the pixels in the captured image and determines whether a pixel is defective. The defect detection circuit generates a first defect indication by determining whether pixel data of a pixel under test is brighter or darker by a first threshold value than pixel data of pixels in pixel tiles surrounding the pixel tile corresponding to the pixel under test. Moreover, the defect detection circuit generates a second defect indication by determining whether pixel data of the pixel under test is brighter or darker by a second threshold value than pixel data of other pixels in the pixel tile corresponding to the pixel under test. Using the first and second defect indications, the defect detection circuit identifies whether the pixel data of the pixel under test is defective.
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Patent Agency Ranking
公开(公告)号：US11587209B2
公开(公告)日：2023-02-21
申请号：US17500386
申请日：2021-10-13
Applicant: Apple Inc.
Inventor： Sheng Lin
Abstract: Embodiments relate to axial chromatic aberration (ACA) reduction of raw image data generated by image sensors. A chromatic aberration reduction circuit performs chromatic aberration reduction on the raw image data to correct the ACA in the full color images through sharpening that has been clamped to reduce sharpening overshoot.
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公开(公告)号：US11176643B1
公开(公告)日：2021-11-16
申请号：US16865883
申请日：2020-05-04
Applicant: Apple Inc.
Inventor： Sheng Lin
Abstract: Embodiments relate to axial chromatic aberration (ACA) reduction of raw image data generated by image sensors. A chromatic aberration reduction circuit performs chromatic aberration reduction on the raw image data to correct the ACA in the full color images through sharpening that has been clamped to reduce sharpening overshoot.
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公开(公告)号：US20200053302A1
公开(公告)日：2020-02-13
申请号：US16101154
申请日：2018-08-10
Applicant: Apple Inc.
Inventor： Sheng Lin , David R. Pope
Abstract: Embodiments relate to a pixel defect detection circuit for detecting and correcting defective pixels in captured image frames. The pixel defect detection circuit includes a defect pixel location table that maps pixel locations in an image frame to respective confidence values, each confidence value indicating a likelihood that a corresponding pixel is defective. The pixel defect detection circuit further includes a dynamic defect processing circuit configured to determine whether a first pixel of an image frame is defective, and a flatness detection circuit configured to determine whether the first pixel is in a flat region of the image frame. The confidence value corresponding to the location of the first pixel is updated based upon whether the first pixel is determined be defective if the first pixel is determined to be in a flat region, and not updated if the first pixel is determined to not be in a flat region.
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公开(公告)号：US10440299B2
公开(公告)日：2019-10-08
申请号：US14845659
申请日：2015-09-04
Applicant: Apple Inc.
Inventor： Sheng Lin , D. Amnon Silverstein , David R. Pope , Suk Hwan Lim
Abstract: An image signal processor may include a pixel defect correction component that tracks defect history for frames captured by an image sensor and applies the history when identifying and correcting defective pixels in a frame. The component maintains a defect pixel location table that includes a defect confidence value for pixels of the image sensor. The component identifies defective pixels in a frame, for example by comparing each pixel's value to the values of its neighbor pixels. If a pixel is detected as defective, its defect confidence value may be incremented. Otherwise, the value may be decremented. If a pixel's defect confidence value is over a defect confidence threshold, the pixel is considered defective and thus may be corrected. If a pixel's defect confidence value is under the threshold, the pixel is considered not defective and thus may not be corrected even if the pixel was detected as defective.
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公开(公告)号：US09413951B2
公开(公告)日：2016-08-09
申请号：US14449016
申请日：2014-07-31
Applicant: Apple Inc.
Inventor： Suk Hwan Lim , D. Amnon Silverstein , Sheng Lin
CPC classification number: H04N5/23229 , G06T5/002 , G06T5/10 , G06T7/20 , G06T2207/20182 , G06T2207/20201 , H04N5/23254 , H04N5/23267 , H04N9/045
Abstract: A temporal filter may perform dynamic motion estimation and compensation for filtering an image frame. A row of pixels in an image frame received for processing at the temporal filter may be received. A motion estimate may be dynamically determined that registers a previously filtered reference image frame with respect to the row of pixels in the image frame. The reference image frame may be aligned according to the determined motion estimate, and pixels in the row of the image frame may be blended with corresponding pixels in the aligned reference image frame to generate a filtered version of the image frame. Motion statistics may be collected for subsequent processing based on the motion estimation and alignment for the row of pixels in the image frame.
Abstract translation: 时间滤波器可以执行用于过滤图像帧的动态运动估计和补偿。 可以接收用于在时间滤波器处理的图像帧中的像素行。 可以动态地确定运动估计，其相对于图像帧中的像素行注册先前滤波的参考图像帧。 可以根据确定的运动估计来对准参考图像帧，并且可以将图像帧的行中的像素与对准的参考图像帧中的对应像素混合以生成图像帧的滤波版本。 可以基于图像帧中的像素行的运动估计和对准来收集运动统计信息用于后续处理。
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