公开(公告)号：US08265387B2

公开(公告)日：2012-09-11

申请号：US12429429

申请日：2009-04-24

申请人： Vishal Monga ,  Raja Bala ,  Michael Branciforte

发明人： Vishal Monga ,  Raja Bala ,  Michael Branciforte

IPC分类号： G06K9/00

CPC分类号： H04N1/6069

摘要： What is disclosed is a novel system and method for performing spatial gamut mapping on a received input color image having a plurality of pixels. A standard gamut-mapping algorithm is applied to the input color image to produce a gamut-mapped color image. A difference is computed between a selected channel of the input color image and the gamut-mapped image to produce a difference image. A local measure of complexity is derived for a given pixel in the difference image. One or more parameter values of a spatial bilateral filter are obtained from a lookup table based on the computed local measure of complexity. The spatial bilateral filter is applied, using the obtained parameter values, to the current pixel of the difference image to produce a modified pixel in a modified difference image. Thereafter, a modified gamut-mapped color image is obtained from the modified difference image and the gamut-mapped color image.

摘要翻译： 所公开的是用于对具有多个像素的接收输入彩色图像执行空间色域映射的新型系统和方法。 将标准色域映射算法应用于输入彩色图像以产生色域映射彩色图像。 在输入彩色图像的选定通道和色域映射图像之间计算差异以产生差分图像。 导出差分图像中给定像素的局部度量度量。 基于所计算的本地复杂度测量，从查找表获得空间双边滤波器的一个或多个参数值。 使用获得的参数值将空间双边滤波器应用于差分图像的当前像素，以产生经修改的差分图像中的修改像素。 此后，从修改的差分图像和色域映射彩色图像获得修改的色域映射彩色图像。

公开(公告)号：US08077352B2

公开(公告)日：2011-12-13

申请号：US12359649

申请日：2009-01-26

申请人： Edgar Bernal ,  Robert P Loce ,  Raja Bala

发明人： Edgar Bernal ,  Robert P Loce ,  Raja Bala

IPC分类号： G06F15/00

CPC分类号： H04N1/60 ,  H04N1/409

摘要： An image processing apparatus, program product, and method determine an achievable gamut achievable by the imaging engine or engines for all spatial locations of an output image, or all utilized print engines. A reference gamut is calculated which is any gamut containing the achievable gamut. A gamut mapping is used to map gamuts from the mean gamut to the achievable gamut, and a set of transformations is calculated for each of a set of input colors to a set of target colors selected from colors in the achievable gamut. Values for a received digital image are transformed for each image pixel or clusters of pixels based on the calculated set of transformations. Output images are generated based on the transformed values.

摘要翻译： 图像处理装置，程序产品和方法确定由输出图像或所有使用的打印引擎的所有空间位置的成像引擎或引擎可实现的可实现色域。 计算参考色域，其中包含可实现色域的任何色域。 色域映射用于将色域从均匀色域映射到可实现色域，并且将一组输入颜色中的每一个计算为从可实现色域中的颜色中选择的一组目标颜色的一组变换。 基于所计算的变换集合，针对每个图像像素或像素簇变换接收数字图像的值。 基于变换后的值生成输出图像。

公开(公告)号：US20110286015A1

公开(公告)日：2011-11-24

申请号：US12782362

申请日：2010-05-18

申请人： Martin S. Maltz ,  Raja Bala ,  Yonghui Zhao ,  Matthew Frederick Hoffmann

发明人： Martin S. Maltz ,  Raja Bala ,  Yonghui Zhao ,  Matthew Frederick Hoffmann

IPC分类号： H04N1/60 ,  G06K9/00

CPC分类号： H04N1/6019

摘要： What is disclosed is a novel system and method for converting a set of L*a*b* values to CMYK color space in which all CMYK formulations that produce each L*a*b* value are found and enumerated. The CMYK formulations are found through a search algorithm starting with the lightest L*a*b* values then visiting neighboring L*a*b* values until the entire L*a*b* color set has been processed. The CMYK space is tessellated into a set of pentahedrons, and for each L*a*b* value, an enclosing pentahedron is found and the CMYK values corresponding to where the locus of this point penetrates each surface is recorded. Adjacent pentahedrons are then visited and this process continues until the gamut boundary is reached. The result is a piecewise linear representation of the CMYK locus containing all values that will give the target L*a*b* value. The present method provides a flexible and powerful approach for solving color management problems.

摘要翻译： 所公开的是用于将一组L * a * b *值转换为CMYK颜色空间的新型系统和方法，其中发现并列举了产生每个L * a * b *值的所有CMYK公式。 通过搜索算法找到CMYK公式，从最轻的L * a * b *值开始，然后访问相邻的L * a * b *值，直到整个L * a * b *颜色集合被处理。 CMYK空间被镶嵌成一组五面体，并且对于每个L * a * b *值，找到包围的五面体，并且记录与该点的轨迹穿过每个表面的位置相对应的CMYK值。 然后访问相邻的五面体，并且该过程继续，直到达到色域边界。 结果是包含将给出目标L * a * b *值的所有值的CMYK轨迹的分段线性表示。 本方法为解决颜色管理问题提供了灵活而强大的方法。

公开(公告)号：US20110216968A1

公开(公告)日：2011-09-08

申请号：US12718297

申请日：2010-03-05

申请人： CLAUDE S. FILLION ,  Vishal Monga ,  Raja Bala

发明人： CLAUDE S. FILLION ,  Vishal Monga ,  Raja Bala

IPC分类号： G06K9/00

CPC分类号： G06K9/00

摘要： A system and method for resizing a digitally represented color image are presented. A color image with pixels defined by luminance and at least one chrominance value is received. For each pixel of the color image, a luminance spatial variation and respective chrominance spatial variations in the respective neighborhood of the each pixel are computed. The luminance spatial variation and the respective chrominance spatial variations are combined to produce a respective importance value for each pixel. Selected pixels are identified based upon their respective importance values and are removed by seam carving of the color image. The seam carving identifies seams of pixels based upon the respective importance values of pixels within the seams of pixels to create a resized color image. The resized color image is produced to an image output device.

摘要翻译： 提出了一种用于调整数字化颜色图像大小的系统和方法。 接收由亮度和至少一个色度值定义的像素的彩色图像。 对于彩色图像的每个像素，计算每个像素的相应邻域中的亮度空间变化和相应的色度空间变化。 亮度空间变化和相应的色度空间变化被组合以产生每个像素的相应重要性值。 基于它们各自的重要性值来识别所选择的像素，并且通过彩色图像的缝隙去除。 接缝雕刻基于像素接缝内的像素的相应重要性值来识别接缝像素，以产生调整大小的彩色图像。 调整大小的彩色图像被产生到图像输出装置。

公开(公告)号：US20100302594A1

公开(公告)日：2010-12-02

申请号：US12475748

申请日：2009-06-01

申请人： Edward Chapman ,  Hengzhou Ding ,  Reiner Eschbach ,  Raja Bala

发明人： Edward Chapman ,  Hengzhou Ding ,  Reiner Eschbach ,  Raja Bala

IPC分类号： G06K15/00 ,  G06K9/32

CPC分类号： G06T11/60

摘要： Systems and methods are described that facilitate real-time personalization of an electronic image by overlaying a text string on a planar surface of an object in the electronic image. A linear or affine transform is executed on a selected text string to position the text string in a reference rectangle or text box. A non-linear or projective transform is applied to the rectangular text box to project the box into a user-defined quadrilateral on the planar surface in the image. A page description language (PDL) file is generated and includes the transformed quadrilateral text box overlaid on the electronic image. At print-time, a database (e.g., a spreadsheet or the like) containing multiple text strings is read, once for each text string, and multiple images are printed. Each printed image has one of the text strings overlaid thereon, on the planar surface defined by the quadrilateral.

摘要翻译： 描述了通过将文本串叠加在电子图像中的对象的平面上来促进电子图像的实时个性化的系统和方法。 对所选文本字符串执行线性或仿射变换，以将文本字符串定位在引用矩形或文本框中。 将非线性或投影变换应用于矩形文本框，以将框投影到图像平面上的用户定义的四边形中。 生成页面描述语言（PDL）文件，并且包括覆盖在电子图像上的经变换的四边形文本框。 在打印时，读取包含多个文本串的数据库（例如，电子表格等），每个文本串一次，并且打印多个图像。 每个打印的图像在由四边形限定的平面上具有覆盖在其上的文本串中的一个。

公开(公告)号：US20100239162A1

公开(公告)日：2010-09-23

申请号：US12406303

申请日：2009-03-18

申请人： Vishal Monga ,  Raja Bala

发明人： Vishal Monga ,  Raja Bala

IPC分类号： G06K9/00

CPC分类号： H04N1/6016 ,  H04N1/603

摘要： This disclosure provides methods, apparatus and systems for performing image processing regression for approximating multidimensional color transformation. According to an exemplary method, a shaping matrix is selected to minimize a cost function associated with a local linear regression representation of the color transformation.

摘要翻译： 本公开提供了用于执行用于近似多维颜色变换的图像处理回归的方法，装置和系统。 根据示例性方法，选择整形矩阵以最小化与颜色变换的局部线性回归表示相关联的成本函数。

公开(公告)号：US07760934B2

公开(公告)日：2010-07-20

申请号：US12058567

申请日：2008-03-28

申请人： Raja Bala ,  Reiner Eschbach

发明人： Raja Bala ,  Reiner Eschbach

IPC分类号： G06K9/00

CPC分类号： H04N1/40012 ,  H04N5/208 ,  H04N9/77

摘要： A method and apparatus for translating color to grayscale images, wherein at least some pixels of the color image having the same color are mapped to different grays in the grayscale image depending on the spatial surround of each pixel. Further, the method and apparatus may include applying a high pass filter to at least one chrominance component of a color image to generate at least one high pass filtered chrominance component, and adjusting a luminance component of the color image based upon the at least one high pass filtered chrominance component.

摘要翻译： 一种用于将颜色转换为灰度图像的方法和装置，其中根据每个像素的空间环绕，具有相同颜色的彩色图像的至少一些像素被映射到灰度图像中的不同灰度。 此外，所述方法和装置可以包括将高通滤波器应用于彩色图像的至少一个色度分量以产生至少一个高通滤波色度分量，并且基于至少一个高频来调整彩色图像的亮度分量 通过滤色度分量。

公开(公告)号：US07747073B2

公开(公告)日：2010-06-29

申请号：US10997528

申请日：2004-11-24

申请人： Raja Bala ,  Gaurav Sharma

发明人： Raja Bala ,  Gaurav Sharma

IPC分类号： G06K9/00 ,  G03F3/08

CPC分类号： H04N1/603

摘要： A system and method for generating an adjusted profile for a device in response to a specified aim, where the aim may include parameters established in response to a user's specifications, for device emulation, etc.

摘要翻译： 一种用于响应于指定目的产生用于设备的经调整的简档的系统和方法，其中目的可以包括响应于用户的规范而建立的参数，用于设备仿真等。

公开(公告)号：US20100040282A1

公开(公告)日：2010-02-18

申请号：US12191721

申请日：2008-08-14

申请人： Raja Bala ,  Reiner Eschbach ,  Yonghui Zhao

发明人： Raja Bala ,  Reiner Eschbach ,  Yonghui Zhao

IPC分类号： G06K9/00

CPC分类号： G06K9/38 ,  G06K2009/0059 ,  G06K2209/01 ,  G06T7/11 ,  G06T7/155 ,  G06T7/194 ,  G06T2207/10008 ,  G06T2207/20036 ,  G07D7/005

摘要： A method and system for identifying a fluorescence mark in a printed document includes using an image acquisition device to derive an input digital image that represents a printed document including a background and a fluorescence mark adjacent the background. The input digital image includes multiple color channel digital images, with each color channel digital image comprising a plurality of pixels each defined by a gray value. For each pixel of at least one of the color channel digital images, the gray value is adjusted based upon a variance of adjacent pixel gray values to define a filtered digital image including a plurality of pixels each defined by an adjusted gray value. Some pixels of the filtered digital image correspond to low variance regions of the input digital image and other pixels of the filtered digital image correspond to high variance regions of the input digital image. A binary image is derived that represents the filtered digital image by mapping each adjusted gray value of the filtered image to either a first or second possible binary pixel value. The binary image includes a binary representation of the fluorescence mark and a binary representation of the background. At least one morphological operation is performed on the binary image to adjust the pixel values of the binary representation of the background so that all pixel values of the binary representation of the background are opposite the binary pixel value used for the binary representation of the fluorescence mark. An ASCII character for the binary representation of the fluorescence mark (or each constituent character thereof) can be derived and compared to a known security code to authenticate the printed document.

摘要翻译： 用于识别印刷文档中的荧光标记的方法和系统包括使用图像获取装置来导出表示包括背景的印刷文档和邻近背景的荧光标记的输入数字图像。 输入数字图像包括多个彩色通道数字图像，每个彩色通道数字图像包括由灰度值定义的多个像素。 对于至少一个颜色通道数字图像的每个像素，基于相邻像素灰度值的方差来调整灰度值，以定义包括由调整的灰度值定义的多个像素的滤波数字图像。 滤波数字图像的一些像素对应于输入数字图像的低方差区域，并且滤波数字图像的其他像素对应于输入数字图像的高方差区域。 导出二进制图像，其通过将滤波图像的每个经调整的灰度值映射到第一或第二可能二进制像素值来表示经滤波的数字图像。 二进制图像包括荧光标记的二进制表示和背景的二进制表示。 对二进制图像执行至少一个形态学操作以调整背景的二进制表示的像素值，使得背景的二进制表示的所有像素值与用于荧光标记的二进制表示的二进制像素值相反 。 可以导出用于荧光标记（或其每个构成字符）的二进制表示的ASCII字符，并将其与已知的安全代码进行比较以验证打印文档。

公开(公告)号：US07652791B2

公开(公告)日：2010-01-26

申请号：US11488355

申请日：2006-07-18

申请人： Ann L. McCarthy ,  Edul N. Dalal ,  Wencheng Wu ,  Dale R. Mashtare ,  Raja Bala

发明人： Ann L. McCarthy ,  Edul N. Dalal ,  Wencheng Wu ,  Dale R. Mashtare ,  Raja Bala

IPC分类号： G06F3/12

CPC分类号： H04N1/6055 ,  G06F3/1204 ,  G06F3/1208 ,  G06F3/1234 ,  G06F3/1273 ,  H04N1/40006 ,  H04N1/6011

摘要： Consistency of document reprints is improved by recording characteristics of a reference printing system used to produce a reference printing of a document, determining related characteristics of a reprint printing system, retrieving the recorded characteristics and compensating for differences between the reference system and the reprint system in the reprint system prior to using the reprint system to produce reprints of the document. Analytical test prints (TPs) are produced with the respective printing systems in close temporal association to the production of the respective reference prints and reprints. TPs can be customized according to aspects of the document. TP customization allows the compensation to address aspects of the printing systems that have a bearing on perceived consistency in the reprints. TPs can be customized with regard to colors in test patches or both the colors and locations of test patches on a page. Compensation is based on measurements of the TPs.

摘要翻译： 通过记录用于生成文档的参考打印的参考打印系统的特性来改进文档重印的一致性，确定重印打印系统的相关特征，检索记录的特性并补偿参考系和重印系统之间的差异 在重印系统使用转印系统之前，重印系统可以重印本文档。 分析测试印刷品（TP）与相应的印刷系统一起生产，与相应的参考印刷品的印刷和重印相关。 TP可以根据文档的方面进行定制。 TP定制允许补偿来处理与重印中感知到的一致性有关的打印系统的方面。 TP可以针对测试补丁中的颜色或页面上测试补丁的颜色和位置进行定制。 补偿是基于TP的测量。