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31. 发明授权

US07002566B1 Failsafe display of frame locked graphics 失效
标题翻译：框架锁定图形的失效保护显示
公开(公告)号：US07002566B1
公开(公告)日：2006-02-21
申请号：US10728241
申请日：2003-12-03
申请人： Michael G. West , Jamie J. LeVasseur
发明人： Michael G. West , Jamie J. LeVasseur
IPC分类号： G09G5/007
CPC分类号： G09G3/2092 , G09G5/005 , G09G5/006 , G09G5/06 , G09G2320/08 , G09G2340/02 , G09G2340/0407 , H04N19/423 , H04N19/59
摘要： A system including a failsafe mechanism adapted to visually display frame locked digital image data and a method therefor. The system receives input image data at an input frame rate and/or input resolution. The packing circuit generates coded image data by compressing the input image data. An unpacking circuit decompresses the coded image and provides output image data to a display device at an output frame rate and/or output resolution.
摘要翻译：一种包括故障保护机构的系统，其适于视觉地显示帧锁定的数字图像数据及其方法。系统以输入帧速率和/或输入分辨率接收输入图像数据。包装电路通过压缩输入图像数据来生成编码图像数据。解包电路解压编码图像并以输出帧速率和/或输出分辨率将输出图像数据提供给显示设备。

32. 发明授权

US06997563B1 Keystone correction derived from the parameters of projectors 有权
公开(公告)号：US06997563B1
公开(公告)日：2006-02-14
申请号：US10849998
申请日：2004-05-19
申请人： Zhongde Wang , Tianbing Brian Teng
发明人： Zhongde Wang , Tianbing Brian Teng
IPC分类号： G03B21/00 , G03B21/14
CPC分类号： H04N9/3185 , G03B21/14
摘要： A projector determines horizontal and vertical tilt angles. Using the tilt angles and the inherent properties of the projector, keystone correction corner points for the image can be computed. The keystone correction corner points can be used to perform keystone correction on the image.

33. 发明授权

US11356604B2 Methods and systems for image processing with multiple image sources 有权
公开(公告)号：US11356604B2
公开(公告)日：2022-06-07
申请号：US16792053
申请日：2020-02-14
申请人： Pixelworks, Inc.
发明人： Neil Woodall , Yue Ma , Hongmin (Bob) Zhang
IPC分类号： H04N5/232 , H04N5/265 , H04N5/247 , G06T5/50 , H04N5/262 , H04N5/225 , H04N21/2343
摘要： Various methods and systems are provided for image processing for multiple cameras. In one embodiment, a method comprises acquiring a plurality of image frames from each image frame source of a plurality of image frame sources, each plurality of image frames acquired at a first frame rate, combining the plurality of image frames from each image frame source into a single plurality of image frames with a second frame rate higher than the first frame rate, and outputting the single plurality of image frames as a video. In this way, high-frame-rate video may be obtained with multiple low-frame-rate image frame sources or cameras.

34. 发明申请

US20210258510A1 METHODS AND SYSTEMS FOR IMAGE PROCESSING WITH MULTIPLE IMAGE SOURCES 有权
公开(公告)号：US20210258510A1
公开(公告)日：2021-08-19
申请号：US16792053
申请日：2020-02-14
申请人： Pixelworks, Inc.
发明人： Neil Woodall , Yue Ma , Hongmin (Bob) Zhang
IPC分类号： H04N5/265 , H04N5/247 , H04N5/262 , G06T5/00 , G06T5/50
摘要： Various methods and systems are provided for image processing for multiple cameras. In one embodiment, a method comprises acquiring a plurality of image frames from each image frame source of a plurality of image frame sources, each plurality of image frames acquired at a first frame rate, combining the plurality of image frames from each image frame source into a single plurality of image frames with a second frame rate higher than the first frame rate, and outputting the single plurality of image frames as a video. In this way, high-frame-rate video may be obtained with multiple low-frame-rate image frame sources or cameras.

35. 发明授权

US10219000B1 Time stamp recovery and frame interpolation for frame rate source 有权
公开(公告)号：US10219000B1
公开(公告)日：2019-02-26
申请号：US14920673
申请日：2015-10-22
申请人： Pixelworks, Inc.
发明人： Guohua Cheng , Yue Ma , Bob Zhang , Minghui Yang , Neil Woodall , Xuan Wu
IPC分类号： H04N5/14 , H04N7/01 , H04N19/52 , H04N19/105 , H04N19/139 , H04N19/172 , H04N19/513
摘要： A method of performing motion vector correction in a sequence of video frames includes receiving, at a processor, a frame of video frames at a received rate lower than an original frame rate, identifying motion vector candidates for a frame in the sequence of video frames, detecting a cadence of the sequence of video frames using the motion vector candidates, scaling the motion vector candidates according to the cadence to produce scaled motion vector candidates, calculating motion vectors for a frame in the sequence of video frames using the scaled motion vector candidates, and interpolating at least one new frame of video data using the motion vectors.

36. 发明授权

US09959597B1 Noise reduction with multi-frame super resolution 有权
公开(公告)号：US09959597B1
公开(公告)日：2018-05-01
申请号：US15632590
申请日：2017-06-26
申请人： PIXELWORKS, INC.
发明人： Guodong Liu , Junhua Chen
IPC分类号： G06K9/40 , G06T3/40 , G06T5/00
CPC分类号： G06T3/4076 , G06T5/003 , G06T5/50 , G06T2207/10016 , G06T2207/20021 , G06T2207/20048 , G06T2207/20182 , G06T2207/20201
摘要： A method of generating super resolution image data includes receiving original image data of a low resolution at an image processing device, performing motion compensation on the original image data using a current frame of image data and at least one previous frame of image data and at least one future frame of image data as reference frames, generating motion vectors, applying noise reduction to the current frame of image data and the reference frames to produce noise reduced, current frame image data, and generating a current frame of super resolution image data using the noise reduced, current frame image data.

37. 发明授权

US09786034B1 Low cost color channel adaptive processes 有权
公开(公告)号：US09786034B1
公开(公告)日：2017-10-10
申请号：US14265905
申请日：2014-04-30
申请人： Pixelworks, Inc.
发明人： Neil Woodall
IPC分类号： G06T3/40
CPC分类号： G06T3/4007
摘要： A method of scaling image data, includes receiving image data at a processor in at least two channels, the image data having a first resolution for the a channel and a second, lower resolution for other channels, using known pixel values of the first resolution pixels to generate an interpolation function to be applied to second resolution pixels co-located with a subset of the first resolution pixels, and applying the interpolation function to the second resolution pixels to find the unknown pixel values.

38. 发明授权

US09357161B1 Motion vector interpolation for motion compensation 有权
标题翻译：运动矢量插补运动补偿
公开(公告)号：US09357161B1
公开(公告)日：2016-05-31
申请号：US13275263
申请日：2011-10-17
申请人： Guohua Cheng , Neil D. Woodall , Bob Zhang , Xiaojie Sheng
发明人： Guohua Cheng , Neil D. Woodall , Bob Zhang , Xiaojie Sheng
IPC分类号： H04N7/00
CPC分类号： H04N7/00 , G06T3/4007 , H04N5/145 , H04N7/014
摘要： A method of performing motion compensation includes identifying a set of candidate motion vectors for a block in an intermediate frame from a set of motion vectors from a previous and current frames, performing block-level analysis for each candidate motion vector, selecting an interpolation motion vector, and using the interpolation motion vector to interpolate the intermediate frame between the previous and current frames, wherein the number of intermediate frames depends upon a conversion to a faster frame rate. A method of determining background and foreground motion vectors for a block in an interpolated frame includes comparing a first motion vector that points to a previous frame to a second motion vector that points to a next frame to produce a difference, and designating one of the first and second motion vectors as a background motion vector and the other as a foreground motion vector depending upon the difference.
摘要翻译：执行运动补偿的方法包括从前一帧和当前帧的一组运动矢量中识别中间帧中的块的一组候选运动矢量，对每个候选运动矢量执行块级分析，选择插值运动矢量并且使用插值运动矢量来内插先前帧和当前帧之间的中间帧，其中中间帧的数量取决于转换到更快的帧速率。确定内插帧中的块的背景和前景运动矢量的方法包括将指向前一帧的第一运动矢量与指向下一帧的第二运动矢量进行比较以产生差值，并且指定第一和作为背景运动矢量的第二运动矢量，另一个作为取决于差的前景运动矢量。

39. 发明授权

US09357105B1 Artifacts measurement on video decomposable properties by dynamic fuzzy reasoning 有权
公开(公告)号：US09357105B1
公开(公告)日：2016-05-31
申请号：US13840284
申请日：2013-03-15
申请人： Pixelworks, Inc.
发明人： Yue Ma , Hongmin Zhang
IPC分类号： H04N5/21
CPC分类号： H04N5/21 , G06T3/4007 , G09G5/00 , G09G2310/0229 , G09G2320/0247 , G09G2320/0261 , H04N5/142 , H04N7/012 , H04N7/0142
摘要： To determine if a pixel exhibits artifacts, statistics are generated for the pixel and its neighbors. These statistics are compared with thresholds. If the comparison of the statistics and the thresholds suggests that the pixel exhibits a pixel artifact, then recourse can be taken, either to adjust the pixel value in some way, or to reject the angle of interpolation used in computing the value for the target pixel.

40. 发明授权

US08942503B1 Global motion vector calculation using phase plane correlation 有权
标题翻译：使用相位平面相关的全局运动矢量计算
公开(公告)号：US08942503B1
公开(公告)日：2015-01-27
申请号：US14080352
申请日：2013-11-14
申请人： Pixelworks, Inc.
发明人： Neil Woodall , Guodong Liu , Minghui Yang
IPC分类号： G06K9/36 , H04N19/527
CPC分类号： H04N19/00593 , H04N19/527
摘要： A method of performing motion compensation includes dividing at least one frame of image data into blocks, performing phase plane correlation to determine a correlation surface for each block between a first frame and a second frame, using the correlation surfaces for each block in the first frame to produce a global correlation surface for a first frame, using the global correlation surface to produce a refined correlation surface, selecting peaks in the refined correlation surface, and perform sub-pixel motion vector calculations to produce global motion vectors using the peaks.
摘要翻译：执行运动补偿的方法包括将至少一帧图像数据划分成块，执行相位相关，以使用第一帧中的每个块的相关表面来确定第一帧和第二帧之间的每个块的相关表面为了产生用于第一帧的全局相关表面，使用全局相关表面来产生精细的相关表面，在精细相关表面中选择峰值，并执行子像素运动矢量计算，以使用峰值产生全局运动矢量。

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