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公开(公告)号：US10764470B1
公开(公告)日：2020-09-01
申请号：US16298190
申请日：2019-03-11
Applicant: Xerox Corporation
Inventor： Xing Li , Peter McCandlish , Clara Cuciurean-Zapan
Abstract: A system and method for tile type based color space transformation improves the performance and image quality of multifunction devices. The disclosed embodiments transform an input image on a tile by tile basis. If a tile is detected as neutral, simple 1D L* to CMYK Tone Reproduction Curves or Look-Up-Tables are used to convert the input pixels of the tile in L*a*b* to output pixels in CMYK. If a tile is detected as containing color content, then the input pixels are chrominance adjusted and subsequently converted to CMYK using regular tetrahedral interpolation.
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公开(公告)号：US10582091B1
公开(公告)日：2020-03-03
申请号：US16298439
申请日：2019-03-11
Applicant: Xerox Corporation
Inventor： Xing Li , Peter McCandlish , Clara Cuciurean-Zapan
IPC: H04N1/60
Abstract: A method and system for an auto-color detection and color transformation is provided including with at least one image signal processor, splitting an input image into a plurality of strips on a page. Each strip is composed of a plurality of pixels. The presence of color data within a strip is determined. Based on a determination that no color data is present within the strip both a monochrome rendering and a simple color rendering of this neutral strip are generated. Based on a determination that color data is present within a strip, the entire page is declared a color page and either one of a simple color rendering (via 1D look up tables) or a complex color rendering (via tetrahedral interpolation) of the strip is generated. Thereafter, only color renderings of subsequent strips is performed for the corresponding page.
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3.发明授权Method and system for inverse halftoning utilizing inverse projection of predicted errors 有权使用反投影预测误差的逆半色调方法和系统公开(公告)号：US09215345B2
公开(公告)日：2015-12-15
申请号：US13850342
申请日：2013-03-26
Applicant: Xerox Corporation
CPC classification number: H04N1/4052 , H04N1/40075 , H04N2201/0094
Abstract: A method and system generates a reconstructed gray scale image of pixels from a binary image of pixels by reverse propagating an error, in a diffused manner, to the pixels of the binary image to create pixels representing a reconstructed gray scale image. The reverse propagation of the error determines if a current pixel has a first predetermined value; sets an error value to a first error value if the current pixel has the first predetermined value; sets the error value to a second error value if the current pixel does not have the first predetermined value; and propagates a diffused error value to a pixel neighboring the current pixel to create an error diffused pixel, the diffused error value being a product of the set error value and a weighting coefficient associated with the pixel neighboring the current pixel. A Gaussian filter may be utilized to filter the pixels representing a gray scale image to create a filtered reconstructed gray scale image of pixels.
Abstract translation: 一种方法和系统通过以扩散的方式将错误反向传播到二进制图像的像素来产生来自像素的二进制图像的像素的重构的灰度图像，以创建表示重构的灰度图像的像素。 错误的反向传播确定当前像素是否具有第一预定值; 如果当前像素具有第一预定值，则将误差值设置为第一误差值; 如果当前像素不具有第一预定值，则将误差值设置为第二误差值; 并且将扩散误差值传播到与当前像素相邻的像素以产生误差扩散像素，扩散误差值是设定误差值与与当前像素相邻的像素相关联的加权系数的乘积。 可以使用高斯滤波器来对表示灰度图像的像素进行滤波，以创建像素的滤波重构的灰度级图像。
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4.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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公开(公告)号：US11418683B1
公开(公告)日：2022-08-16
申请号：US17375647
申请日：2021-07-14
Applicant: Xerox Corporation
Inventor： Frederick J. Ramsey , Thomas L. Pierce , Elizabeth Crossen , Clara Cuciurean-Zapan , Deepthi Sidavanahalli Rao , Alan K. Robertson , David St. John , Jeremy Griffith
Abstract: An image processing system and method provide for receiving a digital document page to be printed. The page includes a background region for which no color is specified. A user is presented with an option to select a print medium from a set of print media of different colors and to select an option for a color of the selected print medium be used as a color of a background layer of the digital document page. When the option is selected, a background layer is inserted into the page. A print job incorporating the processed digital document page is output to an associated printer that is configured to convert the color of the background layer to colorant values that use the print media as a colorant for rendering at least a part of the background region.
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Patent Agency Ranking
6.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：US20180310011A1
公开(公告)日：2018-10-25
申请号：US15493674
申请日：2017-04-21
Applicant: Xerox Corporation
Inventor： Sainarayanan Gopalakrishnan , Xing Li , Rajasekar Kanagasabai , Clara Cuciurean-Zapan , Vignesh Doss
IPC: H04N19/426 , H04N19/33 , H04N19/187
Abstract: An image compression method includes compressing an input image with first and second compression methods to generate first and second (e.g., lossless and lossy) compressed images. First and second residual layers are generated, based on a difference between the first and second compressed images. Connected components in the residual layers are identified. Each connected component includes a group of one or more pixels that, when mapped to the second compressed image is connected, in first and second directions, to pixels in the second compressed image. A compressed image is generated, which includes, for a connected component identified in the first residual layer, removing corresponding pixels from the second compressed image, and for a connected component identified in the second residual layer, adding corresponding pixels to the second compressed image. The system and method can thus provide file size savings associated with lossy compression while avoiding character replacement.
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公开(公告)号：US20150356740A1
公开(公告)日：2015-12-10
申请号：US14296553
申请日：2014-06-05
Applicant: Xerox Corporation
Inventor： Sudhagar Subbaian , Sainarayanan Gopalakrishnan , Xing Li , Clara Cuciurean-Zapan
CPC classification number: G06K9/6267 , G06K9/00456 , G06K9/4638
Abstract: A method and system for segmenting text from non-text portions of a digital image using the size, solidity, and run length characteristics of connected components within the image data. For a connected component comprising a rectangular group of pixels enclosing a set of connected pixels having the same binary state, the size characteristic may be based on a ratio of height to width of the connected component and the total number of pixels within the connected component, the solidity characteristic may be based on a ratio of pixels within a convex hull of the set of connected pixel to a total number of pixels within the connected component, and the run length characteristic may be based on a number of transitions within the connected component.
Abstract translation: 一种用于使用图像数据内的连接分量的大小，坚固度和游程长度特征从数字图像的非文本部分分割文本的方法和系统。 对于包括围绕具有相同二进制状态的一组连接像素的矩形像素组的连接分量，尺寸特征可以基于所连接分量的高度与宽度的比率以及连通分量内的总像素数， 固体特性可以基于所连接的像素组中的凸包内的像素与连通分量内的总像素数的比率，并且游程长度特征可以基于所连接的组件内的多个转换。
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公开(公告)号：US08913824B2
公开(公告)日：2014-12-16
申请号：US13680275
申请日：2012-11-19
Applicant: Xerox Corporation
Inventor： Xing Li , Amal Malik , Clara Cuciurean-Zapan
CPC classification number: G06Q30/04 , G06K9/00442 , H04N1/00005 , H04N1/00068 , H04N1/342
Abstract: A processor-implemented method for processing image data of a document using an apparatus or medium. The processor determines a billable color pixel count in an image by determining a first count of color pixels in the image data in device independent space (e.g., fuzzy and true color counts using a neutral page determination) and a second count of color pixels in device dependent space (e.g., binary CMYK based count). The first and second counts are transformed and a minimum of the transformation is used as the billable count. Based on the disclosed implementation, billing accuracy for outputting color documents is improved and flexibility in tier-based billing is preserved.
Abstract translation: 一种用于使用装置或介质处理文档的图像数据的处理器实现的方法。 处理器通过在设备无关的空间（例如，使用中性页面确定的模糊和真实颜色计数）中确定图像数据中的彩色像素的第一计数和设备中的彩色像素的第二计数来确定图像中的可计费彩色像素计数 依赖空间（例如，基于二进制CMYK的计数）。 转换第一和第二个计数，并将最小的转换用作可结算计数。 基于所公开的实现，提高了用于输出彩色文档的计费精度，并且保持了基于层次计费的灵活性。
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公开(公告)号：US11677891B1
公开(公告)日：2023-06-13
申请号：US17665410
申请日：2022-02-04
Applicant: Xerox Corporation
Inventor： Xing Li , Yongyi Ye , Richard James Eddy, Jr. , William L. Yeoh , Clara Cuciurean-Zapan
CPC classification number: H04N1/32149 , G06T1/0021 , G06T7/70 , G06T2201/0065
Abstract: In an embodiment, a method of rendering an infrared mark, can involve providing an image path for an image processing apparatus, wherein the image path integrates infrared mark related functions with regular image processing functions of the image processing apparatus, and rendering the infrared red mark with the image processing apparatus, after subjecting the infrared mark to the infrared mark related functions in the image path of the image processing apparatus.
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