公开(公告)号：US09070076B1

公开(公告)日：2015-06-30

申请号：US14271494

申请日：2014-05-07

Applicant: XEROX Corporation

Inventor： Mark A. Smith ,  David E. Rumph

IPC: H04N1/40 ,  G06K15/02

CPC classification number: G06K15/1878 ,  H04N1/54 ,  H04N1/6058

Abstract: Systems and methods for extended gamut printing. A print job is received into a print engine having a processor and a limited number of receptacles for colorant extension attachments that can be used in addition to a standard color gamut. The processor analyzes a page of the print job for the color gamut and for the color gamut with each possible gamut extension colorant. The processor calculates gamut distances for the color of each pixel outside of the color gamut for every gamut colorant extension. The gamut distances are the distances from the color of the pixel to a boundary of the color gamut. The processor calculates a sum of the gamut distances. For each pixel on the page outside of the color gamut, the processor selects an extension colorant attachment to attach to the limited physical receptacles based on having the greatest sum of the gamut distances.

Abstract translation: 用于扩展色域打印的系统和方法。 打印作业被接收到具有处理器和有限数量的着色剂扩展附件的插座的打印引擎中，所述附件除了标准色域之外可以使用。 处理器使用每种可能的色域扩展着色剂分析色域和色域的打印作业的页面。 处理器针对每个色域着色剂延伸部分计算色域之外的每个像素的颜色的色域距离。 色域距离是从像素的颜色到色域的边界的距离。 处理器计算色域距离之和。 对于在色域外部的页面上的每个像素，处理器基于具有最大色域距离的总和来选择延伸着色剂附件附着到有限物理插座。

公开(公告)号：US08879121B2

公开(公告)日：2014-11-04

申请号：US13854243

申请日：2013-04-01

Applicant: Xerox Corporation

Inventor： David E. Rumph

IPC: H04N1/60

CPC classification number: H04N1/58

Abstract: Methods and systems for color conversion used in image-processing. In one approach, a caching strategy can be employed rather than a direct computation or a precomputed table. To improve the hit frequency and reduce storage requirements, a hash calculation in addition to comparison operations can be processed as a “near match” rather than an exact match. In another approach, “fuzzy match” caching can be implemented to reach the proper vicinity in the n-dimensional space, and then interpolation (or extrapolation) can refine the result.

Abstract translation: 用于图像处理中的颜色转换的方法和系统。 在一种方法中，可以采用缓存策略而不是直接计算或预计算表。 为了提高命中频率并减少存储要求，除了比较操作之外，哈希计算可以被处理为“近似匹配”而不是精确匹配。 在另一种方法中，可以实现“模糊匹配”缓存以达到n维空间中的正确附近，然后内插（或外推）可以改善结果。

公开(公告)号：US10158784B2

公开(公告)日：2018-12-18

申请号：US15371278

申请日：2016-12-07

Applicant: Xerox Corporation

Inventor： Stephen R. Dashiell ,  David E. Rumph

IPC: H04N1/41 ,  H04N1/413 ,  H04N1/32

Abstract: A system and method adaptively lossy compresses image data by receiving a pixel of image data and meta data indicating a type of object that generated the pixel of image data, the pixel of image data includes a first byte having most significant bits of image data and a second byte having least significant bits of image data; electronically determining if the meta data associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object; electronically modifying the pixel of image data, when it is determined that the meta data is associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object, by setting a predetermined number of low bits of the pixel of image data to zero.

公开(公告)号：US09706085B1

公开(公告)日：2017-07-11

申请号：US15160617

申请日：2016-05-20

Applicant: Xerox Corporation

Inventor： Guo-Yau Lin ,  James Michael Sanchez ,  Michael R. Campanelli ,  David C. Robinson ,  Raju Seetharam ,  David E. Rumph

IPC: H04N1/60

CPC classification number: H04N1/6066 ,  H04N1/54 ,  H04N1/6008 ,  H04N2201/0094

Abstract: A system and method for automatic selection of at least one spot color to be processed by a digital image press includes identifying process colorants to determine principal and extended gamuts thereof. Spot color recipes of the principal and extended gamuts are retrieved from a spot color library, along with a set of attributes corresponding to use of colorants by the digital image press. For each spot color recipe, a combined attribute score is calculated relating to the principal gamut and the extended gamut, spot color recipe of the extended gamut or principal gamut is then identified for use based upon which has the higher combined attribute score. The spot color library is then updated in accordance with the identified recipe for production of each spot color. Print jobs are then output with the appropriate spot color recipe automatically selected.

公开(公告)号：US20140293355A1

公开(公告)日：2014-10-02

申请号：US13854243

申请日：2013-04-01

Applicant: XEROX CORPORATION

Inventor： David E. Rumph

IPC: H04N1/60

CPC classification number: H04N1/58

Abstract: Methods and systems for color conversion used in image-processing. In one approach, a caching strategy can be employed rather than a direct computation or a precomputed table. To improve the hit frequency and reduce storage requirements, a hash calculation in addition to comparison operations can be processed as a “near match” rather than an exact match. In another approach, “fuzzy match” caching can be implemented to reach the proper vicinity in the n-dimensional space, and then interpolation (or extrapolation) can refine the result.

Abstract translation: 用于图像处理中的颜色转换的方法和系统。 在一种方法中，可以采用缓存策略而不是直接计算或预计算表。 为了提高命中频率并减少存储要求，除了比较操作之外，哈希计算可以被处理为“近似匹配”而不是精确匹配。 在另一种方法中，可以实现“模糊匹配”缓存以达到n维空间中的正确附近，然后内插（或外推）可以改善结果。

公开(公告)号：US20180160013A1

公开(公告)日：2018-06-07

申请号：US15371278

申请日：2016-12-07

Applicant: Xerox Corporation

Inventor： Stephen R. Dashiell ,  David E. Rumph

IPC: H04N1/413 ,  H04N1/32

CPC classification number: H04N1/413 ,  H04N1/32277 ,  H04N1/32309 ,  H04N2201/0094 ,  H04N2201/3242 ,  H04N2201/3243 ,  H04N2201/325 ,  H04N2201/3252 ,  H04N2201/3259

Abstract: A system and method adaptively lossy compresses image data by receiving a pixel of image data and meta data indicating a type of object that generated the pixel of image data, the pixel of image data includes a first byte having most significant bits of image data and a second byte having least significant bits of image data; electronically determining if the meta data associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object; electronically modifying the pixel of image data, when it is determined that the meta data is associated with the pixel of image data is associated with a noisy image or indicates that the pixel of image data was generated by a specific type of object, by setting a predetermined number of low bits of the pixel of image data to zero.