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公开(公告)号：US09495731B2
公开(公告)日：2016-11-15
申请号：US14687478
申请日：2015-04-15
Applicant: Apple Inc.
Inventor： Jim C. Chou , Guy Cote , Haiyan He
IPC: G06K9/40 , G06T5/00 , G06T5/20 , G06T5/50 , H04N19/117
CPC classification number: G06T5/002 , G06K9/40 , G06T5/20 , G06T5/50 , G06T2207/20182 , G06T2207/20221 , H04N19/117 , H04N19/136 , H04N19/182 , H04N19/86
Abstract: A method for attenuating banding in image data may involve receiving a stream of input pixels. The method may then include applying a bi-lateral filter to a first portion of the stream of input pixels to generate a first filtered output and applying a high pass filter to a second portion of the stream of input pixels to generate a second filtered output. The method may then determine a local activity and a local intensity associated with the first portion of the stream. The method may then include blending the first filtered output with the first portion of the stream of input pixels based at least in part on the local activity and the local intensity to generate a third filtered output. Afterward, the method may combine the third filtered output with the second filtered output to generate a fourth filtered output that may be output as the image data.
Abstract translation: 用于衰减图像数据中的条带的方法可以涉及接收输入像素的流。 该方法可以包括将双向滤波器应用于输入像素流的第一部分以产生第一滤波输出并将高通滤波器应用于输入像素流的第二部分以产生第二滤波输出。 该方法然后可以确定与流的第一部分相关联的局部活动和局部强度。 该方法可以包括至少部分地基于局部活动和局部强度来混合第一滤波输出与输入像素流的第一部分以产生第三滤波输出。 之后，该方法可以组合第三滤波输出和第二滤波输出，以产生可以作为图像数据输出的第四滤波输出。
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Patent Agency Ranking
公开(公告)号：US20160307302A1
公开(公告)日：2016-10-20
申请号：US14687478
申请日：2015-04-15
Applicant: Apple Inc.
Inventor： Jim C. Chou , Guy Cote , Haiyan He
CPC classification number: G06T5/002 , G06K9/40 , G06T5/20 , G06T5/50 , G06T2207/20182 , G06T2207/20221 , H04N19/117 , H04N19/136 , H04N19/182 , H04N19/86
Abstract: A method for attenuating banding in image data may involve receiving a stream of input pixels. The method may then include applying a bi-lateral filter to a first portion of the stream of input pixels to generate a first filtered output and applying a high pass filter to a second portion of the stream of input pixels to generate a second filtered output. The method may then determine a local activity and a local intensity associated with the first portion of the stream. The method may then include blending the first filtered output with the first portion of the stream of input pixels based at least in part on the local activity and the local intensity to generate a third filtered output. Afterward, the method may combine the third filtered output with the second filtered output to generate a fourth filtered output that may be output as the image data.
Abstract translation: 用于衰减图像数据中的条带的方法可以涉及接收输入像素的流。 该方法可以包括将双向滤波器应用于输入像素流的第一部分以产生第一滤波输出并将高通滤波器应用于输入像素流的第二部分以产生第二滤波输出。 该方法然后可以确定与流的第一部分相关联的局部活动和局部强度。 该方法可以包括至少部分地基于局部活动和局部强度来混合第一滤波输出与输入像素流的第一部分以产生第三滤波输出。 之后，该方法可以组合第三滤波输出和第二滤波输出，以产生可以作为图像数据输出的第四滤波输出。
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公开(公告)号：US11473971B2
公开(公告)日：2022-10-18
申请号：US16586411
申请日：2019-09-27
Applicant: Apple Inc.
Inventor： Xiaohua Yang , Ruiqi Hu , Hao Pan , Vaidyanath Mani , Qiang Wang , Haiyan He , Xin Wang , Gui Xie , Jin Wook Chang
Abstract: A device comprises memory, a display characterized by a display characteristic, and processors coupled to the memory. The processors execute instructions causing the processors to receive data indicative of the display characteristic, data indicative of ambient lighting, and data indicative of content characteristics for a content item; determine a tone mapping curve for the content item based on the data indicative of content characteristics; determine a first, so-called “anchor” point along the tone mapping curve; modify a first portion of the tone mapping curve below the anchor point based on the data indicative of ambient lighting; modify a second portion of the tone mapping curve above the anchor point based on the data indicative of the display characteristic; perform tone mapping for the content item based on the modified toned mapping curve to obtain a tone mapped content item; and cause the display to display the tone mapped content item.
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公开(公告)号：US10764588B2
公开(公告)日：2020-09-01
申请号：US16100310
申请日：2018-08-10
Applicant: Apple Inc.
Inventor： Xiang Fu , Linfeng Guo , Haiyan He , Wei Li , Xu Gang Zhao , Hao Pan , Xiaohua Yang , Krishnakanth Rapaka , Munehiro Nakazato , Haitao Guo
IPC: H04N19/176 , H04N19/126 , G06T7/13 , G06N3/08
Abstract: Techniques are disclosed for coding image data adaptively at different levels of downscaling. Such techniques may involve partitioning input data into pixel blocks for coding and performing content analysis on the pixel blocks. The pixel blocks may be input to block coders that operate at different pixel block sizes, which may code the pixel blocks input to them at their respective sizes. Except when a block coder operates at the partitioning size, block coders that operate at different pixel block sizes may perform downscaling of the pixel blocks to match their size with the block coders' respective coding size. A block decoder may invert the coding operations performed by the block coders, decoding coded image data at respective pixel block sizes, then upscaling decoded image data obtained therefrom to a common pixel block size. Image reconstruction may synthesize a resultant image from the decode pixel block data output by the decoders. Quality enhancements may be added by neural network processing systems that have been trained to other segmented images.
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公开(公告)号：US10063824B2
公开(公告)日：2018-08-28
申请号：US14636682
申请日：2015-03-03
Applicant: Apple Inc.
Inventor： Haiyan He
CPC classification number: H04N9/68 , G06T15/30 , G09G3/2003 , G09G2320/0626 , G09G2340/06 , H04N5/20 , H04N5/202
Abstract: An image processing system performs intensity mapping in a manner that avoids color shifts and conserves processing resources while adapting image data for a target display device. The image processing system may convert input image data to a target color space in which brightness components are orthogonal to other color components. When intensity mapping is performed on image data, the intensity mapping operations do not induce the color shifts that were created in these other proposals. Resource conservation may be achieved by altering operation of perceptual quantization processes as used in other intensity mapping systems. Where prior proposals performed perceptual quantization on all color components of the image data being processed, the disclosed embodiments perform perceptual quantization on only a brightness color component of image data. Thus, these embodiments avoid resource expenditures that otherwise would be spent on perceptual quantization of two other color components.
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公开(公告)号：US20160307298A1
公开(公告)日：2016-10-20
申请号：US14687513
申请日：2015-04-15
Applicant: Apple Inc.
Inventor： Jim C. Chou , Guy Cote , Haiyan He
CPC classification number: G06T3/4007 , G06T5/001 , G06T5/002 , G06T5/10 , G06T2207/10024 , G06T2207/20012 , G06T2207/20028 , G06T2207/20048
Abstract: An image signal processing system may include processing circuitry that may reduce banding artifacts in image data to be depicted on a display. The processing circuitry may receive a first pixel value associated with a first pixel of the image data and detect a first set of pixels located in a first direction along a same row of pixels or a same column of pixels with respect to the first pixel. The first set of pixels is associated with a first band. The processing circuitry may then interpolate a second pixel value based on an average of a first set of pixel values that correspond to the first set of pixels and a distance between the first pixel and a closest pixel in the first band. The processing circuitry may then output the second pixel value for the first pixel.
Abstract translation: 图像信号处理系统可以包括可以减少要在显示器上描绘的图像数据中的带状伪影的处理电路。 处理电路可以接收与图像数据的第一像素相关联的第一像素值，并且相对于第一像素沿同一行像素或相同列的像素检测位于第一方向上的第一组像素。 第一组像素与第一个带相关联。 然后，处理电路可以基于对应于第一组像素的第一组像素值的平均值和第一像素与第一像素中的最近像素之间的距离来内插第二像素值。 处理电路然后可以输出第一像素的第二像素值。
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