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公开(公告)号：US12022213B2
公开(公告)日：2024-06-25
申请号：US17829363
申请日：2022-06-01
Applicant: Apple Inc.
Inventor： Sheng Lin , D. Amnon Silverstein , David R. Pope
CPC classification number: H04N25/46 , G06T5/70 , H04N9/646 , H04N23/67 , H04N23/84 , H04N25/445 , H04N25/68
Abstract: Embodiments relate to image signal processors (ISP) that include binner circuits that down-sample an input image. An input image may include a plurality of pixels. The output image of the binner circuit may include a reduced number of pixels. The binner circuit may include a plurality of different operation modes. In a bin mode, the binner circuit may blend a subset of input pixel values to generate an output pixel quad. In a skip mode, the binner circuit may select one of the input pixel values as the output pixel. The selection may be performed randomly to avoid aliasing. In a luminance mode, the binner circuit may take a weighted average of a subset of pixel values having different colors. In a color value mode, the binner circuit may select one of the colors in a subset of pixel values as an output pixel value.
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公开(公告)号：US20220382045A1
公开(公告)日：2022-12-01
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
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 downs ampled 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：US20220303480A1
公开(公告)日：2022-09-22
申请号：US17829363
申请日：2022-06-01
Applicant: Apple Inc.
Inventor： Sheng Lin , D. Amnon Silverstein , David R. Pope
Abstract: Embodiments relate to image signal processors (ISP) that include binner circuits that down-sample an input image. An input image may include a plurality of pixels. The output image of the binner circuit may include a reduced number of pixels. The binner circuit may include a plurality of different operation modes. In a bin mode, the binner circuit may blend a subset of input pixel values to generate an output pixel quad. In a skip mode, the binner circuit may select one of the input pixel values as the output pixel. The selection may be performed randomly to avoid aliasing. In a luminance mode, the binner circuit may take a weighted average of a subset of pixel values having different colors. In a color value mode, the binner circuit may select one of the colors in a subset of pixel values as an output pixel value.
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34.发明授权公开(公告)号：US11367166B1
公开(公告)日：2022-06-21
申请号：US16906499
申请日：2020-06-19
Applicant: Apple Inc.
Inventor： Zahra Sadeghipoor Kermani , Sheng Lin , Emmanuel Piuze Phaneuf , Ryan Joseph Dunn , Joachim Michael Deguara , Farhan A. Baqai
Abstract: In one implementation, a method includes obtaining an image. The method includes correcting color aberration of the image comprising, for a particular pixel of the image by determining one or more chromatic characteristic values for the particular pixel, determining a likelihood that the particular pixel exhibits color aberration based on the one or more chromatic characteristic values for the particular pixel, generating a filtered version of the particular pixel by filtering the particular pixel using pixels in a neighborhood surrounding the particular pixel, and generating a color-corrected version of the particular pixel based on the likelihood that the particular pixel exhibits color aberration and the filtered version of the particular pixel.
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公开(公告)号：US11074678B2
公开(公告)日：2021-07-27
申请号：US16393892
申请日：2019-04-24
Applicant: Apple Inc.
Inventor： Sheng Lin , Wu Cheng , Maxim Smirnov
Abstract: Embodiments relate to biasing an image noise filter to reduce edge and texture blurring of image data. Pixel values used to determine photometric coefficients for a bilateral filter are modified by offset values. The offset value for a pixel value is determined by applying a high pass filter to the pixel (referred to as the center pixel) and neighboring pixels of the center pixel. By adding the offset value to the center pixel value, the pixel value difference between the neighboring pixels and the center pixel becomes smaller for pixels on the same side of an edge as the center pixel. Thus, pixels on the same side of the edge get more weight in the bilateral noise filter. Conversely, pixels on the opposite side of the edge as the center pixel get less weight in the bilateral filter. As a result, the biased bilateral filter reduces blurring of edges and increases preservation of texture in the image data.
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Patent Agency Ranking
公开(公告)号：US10951843B2
公开(公告)日：2021-03-16
申请号：US16733949
申请日：2020-01-03
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：US10949953B2
公开(公告)日：2021-03-16
申请号：US16352801
申请日：2019-03-13
Applicant: Apple Inc.
Inventor： Sheng Lin , David R. Pope
Abstract: Embodiments relate to directional bilateral filtering of a raw image. For each pixel in the image, a block of pixels surrounding that pixel is used for filtering. When the block of pixels in a Bayer pattern have directionality, directional filter coefficients are used instead of default filter coefficients. To obtain a directional tap, a directional filter coefficient is attenuated by an attenuation factor that differs based at least on the location of the pixels in the pixel block. The directional taps are blended with non-directional taps derived from the default filter coefficients using a weight representing confidence on the directionality. The filtered pixel values are then obtained by multiplying pixel values with corresponding taps.
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公开(公告)号：US10547863B1
公开(公告)日：2020-01-28
申请号：US16100772
申请日：2018-08-10
Applicant: Apple Inc.
Inventor： Muge Wang , Sheng Lin , Weichun Ku , Hsiao-Chen Chang , Yixiang Tao
IPC: H04N19/513 , H04N19/176 , G06T3/00 , H04N1/60 , G06T5/00
Abstract: Embodiments of the present disclosure relate to generating motion vectors. An image signal processor includes a statistics circuit and a vector correlation analysis circuit. The statistics circuit determines image statistics such as vectors representing sums of pixel values of rows or columns of blocks of an image. Additionally, the statistics circuit may mix or aggregate sums of multiple color components. The vector correlation analysis performs cross-correlation between vectors of a current image and reference vectors of a prior image to determine cross-correlation scores. The vector correlation analysis generates a motion vector by identifying shifts in horizontal and vertical directions corresponding to peak values of cross-correlation scores.
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公开(公告)号：US09756266B2
公开(公告)日：2017-09-05
申请号：US14977384
申请日：2015-12-21
Applicant: Apple Inc.
Inventor： Christopher L. Mills , Sheng Lin , David R. Pope , D. Amnon Silverstein , Suk Hwan Lim
CPC classification number: H04N9/04511 , G06T3/4015 , H04N5/2628 , H04N9/07 , H04N9/646 , H04N2209/046
Abstract: An input rescale module that performs cross-color correlated downscaling of sensor data in the horizontal and vertical dimensions. The module may perform a first-pass demosaic of sensor data, apply horizontal and vertical scalers to resample and downsize the data in the horizontal and vertical dimensions, and then remosaic the data to provide horizontally and vertically downscaled sensor data as output for additional image processing. The module may, for example, act as a front end scaler for an image signal processor (ISP). The demosaic performed by the module may be a relatively simple demosaic, for example a demosaic function that works on 3×3 blocks of pixels. The front end of module may receive and process sensor data at two pixels per clock (ppc); the horizontal filter component reduces the sensor data down to one ppc for downstream components of the input rescale module and for the ISP pipeline.
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公开(公告)号：US20170070689A1
公开(公告)日：2017-03-09
申请号：US14848276
申请日：2015-09-08
Applicant: Apple Inc.
Inventor： D. Amnon Silverstein , Sheng Lin , David R. Pope , Suk Hwan Lim
CPC classification number: H04N5/3572 , G06T5/008 , H01L27/14623 , H01L27/14643 , H04N5/3651 , H04N5/3696 , H04N9/646
Abstract: Systems and methods for automatic lens flare compensation may include a non-uniformity detector configured to operate on pixel data for an image in an image sensor color pattern. The non-uniformity detector may detect a non-uniformity in the pixel data in a color channel of the image sensor color pattern. The non-uniformity detector may generate output including location and magnitude values of the non-uniformity. A lens flare detector may determine, based at least on the location and magnitude values, whether the output of the non-uniformity detector corresponds to a lens flare in the image. In some embodiments, the lens flare detector may generate, in response to determining that the output corresponds to the lens flare, a representative map of the lens flare. A lens flare corrector may determine one or more pixel data correction values corresponding to the lens flare and apply the pixel data correction values to the pixel data.
Abstract translation: 用于自动镜头光斑补偿的系统和方法可以包括被配置为对图像传感器颜色图案中的图像的像素数据进行操作的非均匀性检测器。 不均匀性检测器可以检测图像传感器颜色图案的颜色通道中的像素数据的不均匀性。 不均匀性检测器可以产生包括不均匀性的位置和幅度值的输出。 透镜闪光检测器可以至少基于位置和幅度值来确定不均匀性检测器的输出是否对应于图像中的透镜闪光。 在一些实施例中，透镜光斑检测器可以响应于确定输出对应于透镜闪光而产生透镜的代表性地图闪光。 透镜闪光校正器可以确定与透镜光斑相对应的一个或多个像素数据校正值，并将像素数据校正值应用于像素数据。
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