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    Method and system for image processing
    43.
    发明授权
    Method and system for image processing 有权
    图像处理方法和系统

    公开(公告)号：US09563961B1

    公开(公告)日：2017-02-07

    申请号：US15000069

    申请日：2016-01-19

    Applicant: XEROX CORPORATION

    Inventor： Rajasekar Kanagasabai ,  Sainarayanan Gopalakrishnan ,  Xing Li ,  Clara Cuciurean-Zapan ,  Sudhagar Subbaian

    IPC: G06K9/34 ,  G06T7/00

    CPC classification number: G06T7/11 ,  G06K9/342 ,  G06T7/194 ,  G06T2207/10004

    Abstract: A method and an application server are provided for processing an image. The application server comprising an image processing unit processes an image by segmenting into first segmented layer and a second segmented layer. The image processing unit identifies one or more regions in the first segmented layer and for a coordinate in the identified region a vicinity check condition is performed in the second segmented layer. The image processing unit compares a first size of identified region with at least an average size of the set of text components in the second segmented layer. Further, the image processing unit merges the identified region with the second segmented layer to get a processed image.

    Abstract translation: 提供了一种用于处理图像的方法和应用服务器。 包括图像处理单元的应用服务器通过分割成第一分割层和第二分割层来处理图像。 图像处理单元识别第一分割层中的一个或多个区域，并且在所识别的区域中的坐标处，在第二分割层中执行附近检查条件。 所述图像处理单元将所识别的区域的第一大小与所述第二分割层中的所述一组文本成分的平均大小进行比较。 此外，图像处理单元将识别的区域与第二分割层合并以获得经处理的图像。

    Varying trap thickness in an image
    44.
    发明授权
    Varying trap thickness in an image 有权
    图像中不同的陷阱厚度

    公开(公告)号：US09277096B1

    公开(公告)日：2016-03-01

    申请号：US14539590

    申请日：2014-11-12

    Applicant: XEROX CORPORATION

    Inventor： Xing Li ,  Apurba Das

    IPC: H04N1/58 ,  H04N1/409 ,  B41J2/21

    CPC classification number: H04N1/4092 ,  B41J2/2132 ,  H04N2201/0082

    Abstract: A method for varying a thickness of a trap around an object in an image. The method may include selecting a first window along a border of the object. The first window includes one or more first pixels representing the object and one or more second pixels representing a background or another object. A first edge orientation direction is determined based at least partially upon a location of the one or more first pixels in the first window. A first thickness of the object is measured along the first edge orientation direction. A trap is created around the object. A first thickness of the trap proximate to the first window is varied based at least partially upon the first thickness of the object.

    Abstract translation: 用于改变图像中物体周围的陷阱的厚度的方法。 该方法可以包括沿对象的边界选择第一窗口。 第一窗口包括表示对象的一个​​或多个第一像素和表示背景或另一对象的一个​​或多个第二像素。 至少部分地基于第一窗口中的一个或多个第一像素的位置来确定第一边缘取向方向。 沿着第一边缘取向方向测量物体的第一厚度。 在对象周围创建一个陷阱。 至少部分地基于物体的第一厚度改变靠近第一窗口的陷阱的第一厚度。

    Multi-bit error diffusion
    45.
    发明授权
    Multi-bit error diffusion 有权

    公开(公告)号：US09106865B2

    公开(公告)日：2015-08-11

    申请号：US14074477

    申请日：2013-11-07

    Applicant: XEROX CORPORATION

    Inventor： Xing Li ,  Ryan Metcalfe

    IPC: H04N1/52 ,  H04N1/405 ,  H04N1/409

    CPC classification number: H04N1/4052 ,  H04N1/40087 ,  H04N1/405 ,  H04N1/409

    Abstract: The present invention generally relates to systems and methods for error diffusion, e.g., for use in a halftone process. The described techniques are faster than known techniques in that they utilize fewer computations on average. Consequently, the described techniques can be more readily implemented in software, for example, though the described techniques are not limited to software.

    Individualizing reduction of original pages in N-up copying or printing
    46.
    发明授权
    Individualizing reduction of original pages in N-up copying or printing 有权
    在N-up复印或打印中个性化减少原始页面

    公开(公告)号：US09087287B2

    公开(公告)日：2015-07-21

    申请号：US13799017

    申请日：2013-03-13

    Applicant: Xerox Corporation

    Inventor： Sainarayanan Gopalakrishnan ,  Sudhagar Subbaian ,  Clara Cuciurean-Zapan ,  Xing Li

    IPC: G06K15/02 ,  H04N1/387

    CPC classification number: G06K15/1848 ,  H04N1/3875

    Abstract: In response to N-up instructions methods and systems analyze the sizes of printable items within full-size pages to be printed, and determine the minimum size to which each of the full-size pages can be reduced to keep all the printable items above a minimum print item or font size. Because different pages of the print/copy job can have differently sized printable items, at least two of the full-size pages can have a different minimum size to which they can be reduced. Such methods and systems automatically reduce the sizes of the full-size pages (as limited by each potentially different minimum size of each different full-size page) to produce reduced-size pages that will be combined on output pages. Again, because each different full-size page can have a different minimum size, at least two of the full-size pages can be reduced by different reduction amounts during the reduction process.

    Abstract translation: 响应于N-up指令，方法和系统分析要打印的全尺寸页面中的可打印项目的大小，并确定可以缩小每个全尺寸页面的最小尺寸，以将所有可打印项目保持在 最小打印项或字体​​大小。 因为打印/复印作业的不同页面可以具有不同大小的可打印项目，所以至少两个全尺寸页面可以具有不同的最小尺寸，可以减小它们。 这样的方法和系统自动地减小全尺寸页面的大小（由每个不同的全尺寸页面的每个潜在不同的最小尺寸限制），以产生将在输出页面上组合的缩小尺寸的页面。 再次，因为每个不同的全尺寸页面可以具有不同的最小尺寸，所以在缩小过程中可以通过不同的缩小量减少至少两个全尺寸页面。

    Scanner calibration using inverse matrix
    47.
    发明授权
    Scanner calibration using inverse matrix 有权
    扫描仪校准使用逆矩阵

    公开(公告)号：US09025222B1

    公开(公告)日：2015-05-05

    申请号：US14313461

    申请日：2014-06-24

    Applicant: Xerox Corporation

    Inventor： Xing Li ,  Zhenhuan Wen ,  Ryan Metcalfe

    IPC: H04N1/46 ,  H04N1/00 ,  H04N1/60

    CPC classification number: H04N1/00023 ,  H04N1/00018 ,  H04N1/00045 ,  H04N1/00087 ,  H04N1/6033 ,  H04N2201/0005 ,  H04N2201/0081

    Abstract: Methods and systems methods calculate an initial matrix by correlating scanned test device-dependent values to device-independent color space values of a test sheet. The initial matrix converts device-dependent values to device-independent color space values; however, the initial matrix does include some conversion error. Such methods then calculate an inverse matrix from the initial matrix. These methods and systems then calculate target device-dependent values by applying the device-independent color space values to the inverse matrix. The methods and systems derive final one-dimensional look-up tables that isolate the conversion error by correlating the scanned test device-dependent values to the device-independent color space values. These methods and systems then derive a final matrix specific to the scanner by first applying the scanned test device-dependent values to the final one-dimensional look-up tables before creating the final matrix. Then, this final matrix can be substituted for the previously calculated conversion matrix used for non-calibration operation.

    Abstract translation: 方法和系统方法通过将扫描的测试设备相关值与测试表的设备无关的颜色空间值相关联来计算初始矩阵。 初始矩阵将设备相关值转换为与设备无关的色彩空间值; 然而，初始矩阵确实包括一些转换误差。 这样的方法然后从初始矩阵计算逆矩阵。 然后，这些方法和系统通过将与设备无关的颜色空间值应用于逆矩阵来计算目标设备相关值。 方法和系统通过将扫描的与测试设备相关的值与设备无关的色彩空间值进行关联来获得最终的一维查找表，从而隔离转换错误。 然后，这些方法和系统通过在创建最终矩阵之前首先将扫描的与测试设备相关的值应用于最终的一维查找表，从而获得特定于扫描仪的最终矩阵。 然后，该最终矩阵可以代替用于非校准操作的先前计算的转换矩阵。

    MULTI-BIT ERROR DIFFUSION
    48.
    发明申请
    MULTI-BIT ERROR DIFFUSION 有权
    多位错误扩展

    公开(公告)号：US20150110411A1

    公开(公告)日：2015-04-23

    申请号：US14057509

    申请日：2013-10-18

    Applicant: XEROX CORPORATION

    Inventor： Xing Li ,  Ryan Metcalfe

    IPC: H04N1/405

    CPC classification number: H04N1/4052 ,  H04N1/40087 ,  H04N1/405 ,  H04N1/409

    Abstract: The present invention generally relates to systems and methods for error diffusion, e.g., for use in a halftone process. The described techniques are faster than known techniques in that they utilize fewer computations on average. Consequently, the described techniques can be more readily implemented in software, for example, though the described techniques are not limited to software.

    Abstract translation: 本发明一般涉及用于误差扩散的系统和方法，例如用于半色调处理。 所描述的技术比已知技术更快，因为它们平均使用较少的计算。 因此，所描述的技术可以更容易地在软件中实现，例如，尽管所描述的技术不限于软件。

    INDIVIDUALIZING REDUCTION OF ORIGINAL PAGES IN N-UP COPYING OR PRINTING
    49.
    发明申请
    INDIVIDUALIZING REDUCTION OF ORIGINAL PAGES IN N-UP COPYING OR PRINTING 有权
    在N-UP复印或打印中单独减少原稿页

    公开(公告)号：US20140268185A1

    公开(公告)日：2014-09-18

    申请号：US13799017

    申请日：2013-03-13

    Applicant: XEROX CORPORATION

    Inventor： Sainarayanan Gopalakrishnan ,  Sudhagar Subbaian ,  Clara Cuciurean-Zapan ,  Xing Li

    IPC: G06K15/02

    CPC classification number: G06K15/1848 ,  H04N1/3875

    Abstract: In response to N-up instructions methods and systems analyze the sizes of printable items within full-size pages to be printed, and determine the minimum size to which each of the full-size pages can be reduced to keep all the printable items above a minimum print item or font size. Because different pages of the print/copy job can have differently sized printable items, at least two of the full-size pages can have a different minimum size to which they can be reduced. Such methods and systems automatically reduce the sizes of the full-size pages (as limited by each potentially different minimum size of each different full-size page) to produce reduced-size pages that will be combined on output pages. Again, because each different full-size page can have a different minimum size, at least two of the full-size pages can be reduced by different reduction amounts during the reduction process.

    Abstract translation: 响应于N-up指令，方法和系统分析要打印的全尺寸页面中的可打印项目的大小，并确定可以缩小每个全尺寸页面的最小尺寸，以将所有可打印项目保持在 最小打印项或字体​​大小。 因为打印/复印作业的不同页面可以具有不同大小的可打印项目，所以至少两个全尺寸页面可以具有不同的最小尺寸，可以减小它们。 这样的方法和系统自动地减小全尺寸页面的大小（由每个不同的全尺寸页面的每个潜在不同的最小尺寸限制），以产生将在输出页面上组合的缩小尺寸的页面。 再次，因为每个不同的全尺寸页面可以具有不同的最小尺寸，所以在缩小过程中可以通过不同的缩小量减少至少两个全尺寸页面。

    METHOD AND APPARATUS FOR ENABLING PARALLEL PROCESSING OF PIXELS IN AN IMAGE
    50.
    发明申请
    METHOD AND APPARATUS FOR ENABLING PARALLEL PROCESSING OF PIXELS IN AN IMAGE 有权
    用于在图像中实现像素并行处理的方法和装置

    公开(公告)号：US20140125681A1

    公开(公告)日：2014-05-08

    申请号：US13670276

    申请日：2012-11-06

    Applicant: XEROX CORPORATION

    Inventor： Xing Li

    IPC: G06F15/80

    CPC classification number: H04N1/4052 ,  G09G3/2059

    Abstract: A method, non-transitory computer readable medium, and apparatus for enabling parallel processing of pixels in an image are disclosed. For example, the method performs, via a multiple core processor, a one-dimensional error diffusion on the pixels in the image to reduce a number of bits per pixel to a value lower than an initial number of bits per pixel and greater than one, and performs a two-dimensional error diffusion on the pixels in the image that have undergone the one-dimensional error diffusion, to reduce the number of bits per pixel to one bit per pixel.

    Abstract translation: 公开了一种用于使图像中的像素能够并行处理的方法，非暂时计算机可读介质和装置。 例如，该方法通过多核处理器执行图像中的像素上的一维误差扩散，以将每像素的位数减少到低于每像素的初始位数和大于1的值， 并且对已经经历一维误差扩散的图像中的像素执行二维误差扩散，以将每像素的位数减少到每像素1位。

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