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11.发明授权公开(公告)号：US11508071B2
公开(公告)日：2022-11-22
申请号：US17023646
申请日：2020-09-17
Applicant: Xerox Corporation
Inventor： David J. Metcalfe , Clara Cuciurean-Zapan
Abstract: An image processing device includes an input device which receives image adjustment selections from an associated user interface device. Memory of the device stores a user interface generator, which generates a background adjustment selector for presenting to a user on the user interface device; a background adjustment component which, for each of a plurality of pixels of an input image computes adjusted color values, as a function of at least one of: (a) a background adjustment factor computed for the respective pixel, and (b) a background class derived from the computed background adjustment factor, the background adjustment factor being a function of a background strength of the pixel and a luminance strength of the pixel; and an image output component outputs an output image derived from the adjusted color values for the plurality of pixels. A processor implements the background adjustment component and image output component.
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12.发明申请公开(公告)号：US20220084211A1
公开(公告)日：2022-03-17
申请号：US17023646
申请日：2020-09-17
Applicant: Xerox Corporation
Inventor： David J. Metcalfe , Clara Cuciurean-Zapan
Abstract: An image processing device includes an input device which receives image adjustment selections from an associated user interface device. Memory of the device stores a user interface generator, which generates a background adjustment selector for presenting to a user on the user interface device; a background adjustment component which, for each of a plurality of pixels of an input image computes adjusted color values, as a function of at least one of: (a) a background adjustment factor computed for the respective pixel, and (b) a background class derived from the computed background adjustment factor, the background adjustment factor being a function of a background strength of the pixel and a luminance strength of the pixel; and an image output component outputs an output image derived from the adjusted color values for the plurality of pixels. A processor implements the background adjustment component and image output component.
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公开(公告)号：US10924625B2
公开(公告)日：2021-02-16
申请号：US16358959
申请日：2019-03-20
Applicant: Xerox Corporation
Inventor： Louis B. La , David J. Metcalfe
Abstract: An image processing system and method are described which use entropy values in processing the image. For each of a plurality of segments of an image, the segment is considered as a stream of bits and a bit difference is computed between pairs of sequential bit sequences in the stream of bits. An entropy value of the segment is computed as a function of the bit differences. The image is processing based on the computed entropy values, which may include compressing some or all of the image segments using an acceleration factor that is based on the computed entropy value for the segment. In this way, differences in entropy, which correlate with the compressibility of the image segment, can ensure an optimal compression of the segment, or in some cases, no compression.
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Patent Agency Ranking
公开(公告)号：US20200304677A1
公开(公告)日：2020-09-24
申请号：US16358959
申请日：2019-03-20
Applicant: Xerox Corporation
Inventor： Louis B. La , David J. Metcalfe
Abstract: An image processing system and method are described which use entropy values in processing the image. For each of a plurality of segments of an image, the segment is considered as a stream of bits and a bit difference is computed between pairs of sequential bit sequences in the stream of bits. An entropy value of the segment is computed as a function of the bit differences. The image is processing based on the computed entropy values, which may include compressing some or all of the image segments using an acceleration factor that is based on the computed entropy value for the segment. In this way, differences in entropy, which correlate with the compressibility of the image segment, can ensure an optimal compression of the segment, or in some cases, no compression.
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15.发明授权Methods and systems for processing low resolution images via error diffusion 有权通过误差扩散处理低分辨率图像的方法和系统公开(公告)号：US09179039B2
公开(公告)日：2015-11-03
申请号：US14179111
申请日：2014-02-12
Applicant: Xerox Corporation
Inventor： David J. Metcalfe , Ryan D. Metcalfe
CPC classification number: H04N1/4052 , H04N1/393 , H04N1/4053
Abstract: Methods and systems for processing a low resolution image via a low resolution error diffusion algorithm. A low resolution binary output pixel can be generated utilizing a general error diffusion algorithm. The low-resolution binary output pixel can be converted to a predetermined number of interpolated sub-pixel values and each interpolated sub-pixel values can be compared with a threshold in order to generate a scaled slow-scan output pixel utilizing the low resolution error diffusion algorithm. The low resolution error diffusion algorithm includes a highlight threshold adjustment module that adjusts level in order to prevent the scaled slow-scan output pixel from firing around the low resolution binary output pixel within a highlight region. A slow scan error with respect to the scaled slow-scan output pixel can be distributed and stored via error diffusion filter coefficients within an error buffer without additional memory.
Abstract translation: 通过低分辨率误差扩散算法处理低分辨率图像的方法和系统。 可以利用一般的误差扩散算法来生成低分辨率二进制输出像素。 可以将低分辨率二进制输出像素转换成预定数量的内插子像素值，并且可以将每个内插子像素值与阈值进行比较，以便利用低分辨率误差扩散来生成缩放的慢扫描输出像素 算法。 低分辨率误差扩散算法包括高亮度阈值调整模块，其调整电平，以防止缩放的慢扫描输出像素围绕高亮区域内的低分辨率二进制输出像素点燃。 相对于缩放的慢扫描输出像素的慢扫描误差可以通过错误扩散滤波器系数分布并存储在错误缓冲器内而不需要额外的存储器。
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公开(公告)号：US09007659B1
公开(公告)日：2015-04-14
申请号：US14107327
申请日：2013-12-16
Applicant: Xerox Corporation
Inventor： Chao Yu , Xing Li , David J. Metcalfe
CPC classification number: H04N1/4052
Abstract: A method, non-transitory computer readable medium, and apparatus for performing error diffusion are disclosed. For example, the method quantizes an error for a first pixel of a plurality of pixels in a first row, diffuses the error to an adjacent pixel of the plurality of pixels in the first row, performs the quantizing and the diffusing for each remaining pixel of the plurality of pixels in the first row and applies the error that is quantized for each one of the plurality of pixels the first row in a desired number of different directions in a plurality of parallel operations that is equal to the desired number of different directions.
Abstract translation: 公开了一种用于执行误差扩散的方法，非暂时计算机可读介质和装置。 例如，该方法对第一行中的多个像素的第一像素的误差进行量化，将误差扩散到第一行中的多个像素的相邻像素，对每个剩余像素的残留像素执行量化和扩散 第一行中的多个像素，并且在等于期望数量的不同方向的多个并行操作中，将针对所述第一行中的每个像素的每一个量化的误差应用于期望数量的不同方向。
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公开(公告)号：US10086607B1
公开(公告)日：2018-10-02
申请号：US15639235
申请日：2017-06-30
Applicant: Xerox Corporation
Inventor： David J. Metcalfe , John F. Seward, Jr.
IPC: B41J2/045
Abstract: An inkjet printer that is configured to perform multi-pass printing operations includes at least one printhead, a memory and a controller. The controller receives a input row of image data for one pass including a plurality of pixels. The controller uses a table of index lookup offsets in the memory to generate a row of output image data with at least one pixel at a first index in the input row being located at a second index in the output row. The controller operates the inkjets in the printhead to eject at least one drop of ink using an inkjet in the printhead that corresponds to the second index in the output row and that is different than another inkjet in the printhead that corresponds to the first index in the input row.
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公开(公告)号：US08807695B1
公开(公告)日：2014-08-19
申请号：US13754262
申请日：2013-01-30
Applicant: Xerox Corporation
Inventor： David A. Mantell , David J. Metcalfe , Martin L. Frachioni , Raymond J. Clark
IPC: B41J29/393 , B41J2/125
CPC classification number: B41J2/17566 , B41J2002/17569
Abstract: An inkjet printer estimates ink usage in the printer with reference to image pixels and a history of inkjet firing for each inkjet. The printer includes an apparatus that generates an ink mass for each image pixel with reference to the image pixel and a predetermined number of previously ejected image pixels and identifies a total ink mass measurement for a printhead with reference to the ink masses generated for the image pixels of an image to be printed by the inkjet printer.
Abstract translation: 喷墨打印机参照图像像素和每种喷墨的喷墨烧写历史来估计打印机中的墨水使用量。 该打印机包括参考图像像素和预定数量的先前喷射的图像像素产生每个图像像素的油墨质量的装置，并参照为图像像素产生的油墨质量来识别打印头的总油墨质量测量 由喷墨打印机打印的图像。
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