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1. 发明授权

US06731796B2 Graphical user interface for color transformation table editing that avoids reversal artifacts 失效
标题翻译：用于颜色转换表编辑的图形用户界面，可避免反转伪像
公开(公告)号：US06731796B2
公开(公告)日：2004-05-04
申请号：US09731338
申请日：2000-12-06
申请人： Martin S. Maltz , R. Victor Klassen , Thyagarajan Balasubramanian
发明人： Martin S. Maltz , R. Victor Klassen , Thyagarajan Balasubramanian
IPC分类号： G06K900
CPC分类号： H04N1/6027 , H04N1/622
摘要： A transformation function defines a relationship between a first color space and a second color space. The transformation function is edited by producing first and second outputs of an image in the first and second color spaces, respectively. The outputs are related in accordance with the transformation function. A portion of the first output, which corresponds to a portion of the second output including a color to be modified, is selected via a graphical user interface. A desired amount to modify the color is specified. A correction function is determined in accordance with the desired amount. The transformation table is edited in accordance with the monotonic correction function.
摘要翻译：变换函数定义第一颜色空间和第二颜色空间之间的关系。通过分别在第一和第二颜色空间中产生图像的第一和第二输出来编辑变换函数。输出根据变换函数相关。通过图形用户界面选择第一输出的对应于包括要修改的颜色的第二输出的一部分的一部分。指定修改颜色的所需数量。根据期望的量确定校正功能。变换表根据单调校正函数进行编辑。

2. 发明授权

US07307752B1 On-line calibration system for a dynamically varying color marking device 有权
标题翻译：用于动态变化的彩色打标设备的在线校准系统
公开(公告)号：US07307752B1
公开(公告)日：2007-12-11
申请号：US09566291
申请日：2000-05-05
申请人： Lingappa K. Mestha , Peter A. Crean , Martin S. Maltz , Robert J. Rolleston , Yao Rong Wang , Eric Jackson , Thyagarajan Balasubramanian
发明人： Lingappa K. Mestha , Peter A. Crean , Martin S. Maltz , Robert J. Rolleston , Yao Rong Wang , Eric Jackson , Thyagarajan Balasubramanian
IPC分类号： G06F15/00 , H04N1/46 , G03F3/08
CPC分类号： G06F15/00 , H04N1/4078 , H04N1/6027 , H04N1/6033
摘要： A color marking device including a control system for calibration of the device based upon dynamic color balance control of an output image. The system comprises a front end converter for converting an input signal representative of a target image comprising a preselected color into a device-dependent control signal in accordance with a device TRC, a color marking device for outputting an output image in response to the control signal, a sensor for measuring a parameter from the output image representative of a color of the output image, and, a point-wise controller for comparing the parameter with a corresponding parameter from the target image and constructing adjusted controlled points for the device TRC when the measured parameter and the corresponding parameter vary by a preselected value, a color balance controller for constructing an adjusted device TRC from the controlled points, whereby subsequently generated output images are output with the adjusted device TRC and, more accurately represent target input images.
摘要翻译：一种彩色标记装置，包括基于输出图像的动态色彩平衡控制来校准装置的控制系统。该系统包括：前端转换器，用于根据设备TRC将表示包括预选颜色的目标图像的输入信号转换成依赖于设备的控制信号;响应于控制信号输出输出图像的颜色标记装置，用于从表示输出图像的颜色的输出图像中测量参数的传感器，以及用于将参数与来自目标图像的相应参数进行比较的逐点控制器，并且当所述设备TRC的调整的控制点在测量参数和相应的参数由预选值变化，用于从受控点构建调整的设备TRC的色平衡控制器，由此随后生成的输出图像被调整的设备TRC输出，并且更精确地表示目标输入图像。

3. 发明授权

US06268939B1 Method and apparatus for correcting luminance and chrominance data in digital color images 失效
公开(公告)号：US06268939B1
公开(公告)日：2001-07-31
申请号：US09004650
申请日：1998-01-08
申请人： R. Victor Klassen , Thyagarajan Balasubramanian
发明人： R. Victor Klassen , Thyagarajan Balasubramanian
IPC分类号： G03F308
CPC分类号： H04N1/60 , H04N1/6058
摘要： The present invention is directed to a method and apparatus for improving the efficiency of color correcting subsampled luminance and chrominance based data. More specifically, the present invention is directed to a method of applying a full conversion between color spaces for one pixel in a selected pixel block. Chrominance values are assigned to the remaining pixels based upon their luminance values relative to the luminance value of the converted pixel. The invention may be used to convert between various types of color spaces, and may be used in the processing of both device dependent and device independent data.

4. 发明授权

US6009192A Color correction of a compressed image 失效
标题翻译：压缩图像的颜色校正
公开(公告)号：US6009192A
公开(公告)日：1999-12-28
申请号：US770765
申请日：1996-12-19
申请人： R. Victor Klassen , Steven J. Harrington , Thyagarajan Balasubramanian , Ricardo L. de Queiroz
发明人： R. Victor Klassen , Steven J. Harrington , Thyagarajan Balasubramanian , Ricardo L. de Queiroz
IPC分类号： H04N11/04 , H04N1/41 , H04N1/46 , H04N1/60 , H04N7/30 , G06K9/00 , G06K9/36 , G06K9/46
CPC分类号： H04N1/64 , H04N1/60
摘要： The present invention is a method for the color correction of digital images that have been compressed. In a preferred embodiment, aspects of the color correction are carried out on the compressed image data to improve computational efficiency. One of a number of alternative methods is employed to accomplish the color correction on lossy or losslessly compressed images. The color transformation process accomplishes color correction on compressed image data in conjunction with compression or decompression operations. A second, simplified phase of the color correction may be applied subsequently to the decompressed image data in certain embodiments. Accordingly, the technique has application to any number of color imaging systems, including digital printers and copiers where there is a necessity to color correct compressed digital images.
摘要翻译：本发明是一种已被压缩的数字图像的颜色校正方法。在优选实施例中，对压缩图像数据执行颜色校正的方面以提高计算效率。采用多种替代方法之一来实现有损或无损压缩图像上的色彩校正。彩色转换处理结合压缩或解压缩操作对压缩图像数据进行颜色校正。在某些实施例中，随后可以对解压缩的图像数据应用颜色校正的第二简化阶段。因此，该技术可应用于任何数量的彩色成像系统，包括需要对正确的压缩数字图像进行着色的数字打印机和复印机。

5. 发明授权

US07215440B2 Fast interpolation of large color lookup tables 有权
标题翻译：快速内插大型查询表
公开(公告)号：US07215440B2
公开(公告)日：2007-05-08
申请号：US09750552
申请日：2000-12-28
申请人： R. Victor Klassen , Thyagarajan Balasubramanian
发明人： R. Victor Klassen , Thyagarajan Balasubramanian
IPC分类号： G06F15/00 , H04N1/46
CPC分类号： H04N1/6019
摘要： A method for converting a specified color value from a first color space to a second color space identifies the specified color value in the first color space. A converted color space value is received from a final lookup table. The converted color space value is previously determined as a function of the specified color value and a mid-point interpolation and represents the specified color in the second color space. The converted color space value is stored in a memory device.
摘要翻译：将指定颜色值从第一颜色空间转换为第二颜色空间的方法识别第一颜色空间中指定的颜色值。从最终查找表接收转换的颜色空间值。转换的颜色空间值预先被确定为指定颜色值和中点插值的函数，并且表示第二颜色空间中的指定颜色。转换的色彩空间值被存储在存储器件中。

6. 发明授权

US06766051B2 Adaptive tree-base lookup for non-separably divided color tables 失效
标题翻译：不可分割颜色表的自适应树型基础查找
公开(公告)号：US06766051B2
公开(公告)日：2004-07-20
申请号：US09731346
申请日：2000-12-06
申请人： R. Victor Klassen , Thyagarajan Balasubramanian
发明人： R. Victor Klassen , Thyagarajan Balasubramanian
IPC分类号： G06K900
CPC分类号： G06K9/00 , H04N1/6016 , H04N1/6058
摘要： A method of color transformation is based on non-separable tiling of a color space. Non-separable tiling allows fine granularity where it is desired and coarse granularity where it is tolerable. Non-separable tiling of the color space provides improved transformation quality for a given lookup table size. Color space is recursively tiled and addressed. Transformation information from the tiles is stored in a database. Database searching techniques are used to speed information access. For example, a hashing function and hashing table are employed to store and retrieve transformation information. An image processor operative to perform the method includes a database index generator and a database of transformation information. For example, the database index generator generates a hashing key from pixel information and uses a hashing function to generate a database cell index. The image processor includes an output device. The output device is, for example, a xerographic printer.
摘要翻译：颜色变换的方法是基于颜色空间的不可分离的平铺。不可分割的平铺可以在需要的地方进行精细的粒度，在可容忍的地方允许粗粒度。颜色空间的不可分离的平铺为给定的查找表大小提供了改进的转换质量。颜色空间被递归地平铺和解决。来自瓦片的转换信息被存储在数据库中。数据库搜索技术用于加速信息访问。例如，使用散列函数和散列表来存储和检索变换信息。可操作地执行该方法的图像处理器包括数据库索引生成器和变换信息的数据库。例如，数据库索引生成器从像素信息生成哈希键，并使用散列函数生成数据库单元索引。图像处理器包括输出装置。输出设备例如是静电印刷机。

7. 发明授权

US5892891A System for printing color images with extra colorants in addition to primary colorants 失效
标题翻译：除了初级着色剂之外，还可以使用额外的着色剂打印彩色图像
公开(公告)号：US5892891A
公开(公告)日：1999-04-06
申请号：US753131
申请日：1996-11-20
申请人： Edul N. Dalal , Thyagarajan Balasubramanian , R. Victor Klassen
发明人： Edul N. Dalal , Thyagarajan Balasubramanian , R. Victor Klassen
IPC分类号： H04N1/54 , H04N1/50
CPC分类号： H04N1/54
摘要： In a "hi-fi" color printing system, wherein colorants of hi-fi colors beyond the regular CMYK primary colorants are available, a main gamut obtainable with the CMYK colorants only is mutually exclusive with at least one extended gamut in which a hi-fi colorant is used and a complementary one of the CMY colorants is excluded. Because the main and extended gamuts are mutually exclusive, no more than four colorants are used in any part of the image, and no more than four halftone screens need be used to obtain any desired color.
摘要翻译：在“Hi-Fi”彩色打印系统中，其中超过常规CMYK原色剂的高保真色彩的着色剂是可获得的，用CMYK着色剂可获得的主色域仅与至少一个扩展色域相互排斥，其中hi- 使用纤维素着色剂，并排除CMY着色剂中的一种。因为主色域和扩展色域是相互排斥的，所以在图像的任何部分都不能使用四种以上的着色剂，并且不需要使用不超过四个半色调屏幕来获得所需的颜色。

8. 发明授权

US6097838A Color correction of a compressed image 失效
标题翻译：压缩图像的颜色校正
公开(公告)号：US6097838A
公开(公告)日：2000-08-01
申请号：US306162
申请日：1999-05-06
申请人： R. Victor Klassen , Steven J. Harrington , Thyagarajan Balasubramanian , Ricardo L. de Queiroz
发明人： R. Victor Klassen , Steven J. Harrington , Thyagarajan Balasubramanian , Ricardo L. de Queiroz
IPC分类号： H04N11/04 , H04N1/41 , H04N1/46 , H04N1/60 , H04N7/30 , G06K9/00 , G03F3/08 , G06K9/36 , G06K9/38 , G06K9/46
CPC分类号： H04N1/64 , H04N1/60
摘要： The present invention is a method for the color correction of digital images that have been compressed. In a preferred embodiment, aspects of the color correction are carried out on the compressed image data to improve computational efficiency. One of a number of alternative methods is employed to accomplish the color correction on lossy or losslessly compressed images. The color transformation process accomplishes color correction on compressed image data in conjunction with compression or decompression operations. A second, simplified phase of the color correction may be applied subsequently to the decompressed image data in certain embodiments. Accordingly, the technique has application to any number of color imaging systems, including digital printers and copiers where there is a necessity to color correct compressed digital images
摘要翻译：本发明是一种已被压缩的数字图像的颜色校正方法。在优选实施例中，对压缩图像数据执行颜色校正的方面以提高计算效率。采用多种替代方法之一来实现有损或无损压缩图像上的色彩校正。颜色转换处理结合压缩或解压缩操作对压缩图像数据进行颜色校正。在某些实施例中，随后可以对解压缩的图像数据应用颜色校正的第二简化阶段。因此，该技术适用于任何数量的彩色成像系统，包括数字打印机和复印机，其中需要对正确的压缩数字图像进行着色

9. 发明授权

US06239886B1 Method and apparatus for correcting luminance and chrominance data in digital color images 失效
标题翻译：用于校正数字彩色图像中的亮度和色度数据的方法和装置
公开(公告)号：US06239886B1
公开(公告)日：2001-05-29
申请号：US09004295
申请日：1998-01-08
申请人： R. Victor Klassen , Thyagarajan Balasubramanian
发明人： R. Victor Klassen , Thyagarajan Balasubramanian
IPC分类号： G03F308
CPC分类号： H04N1/608
摘要： The present invention is directed to a method and apparatus for improving the efficiency of color correcting subsampled luminance and chrominance based data. More specifically, the present invention is directed to a method of applying a full conversion between color spaces for one pixel in a selected pixel block. Chrominance values are assigned to the remaining pixels based upon their luminance values relative to the luminance value of the converted pixel. The invention may be used to convert between various types of color spaces, and may be used in the processing of both device dependent and device independent data.
摘要翻译：本发明涉及一种用于提高色彩校正子采样亮度和基于色度的数据的效率的方法和装置。更具体地，本发明涉及一种在所选像素块中的一个像素的颜色空间之间应用完全转换的方法。基于其相对于转换像素的亮度值的亮度值，将色度值分配给剩余的像素。本发明可以用于在各种颜色空间之间进行转换，并且可以用于处理器件相关的和器件无关的数据。

10. 发明授权

US5544284A Sequential product code quantization of digital color image 失效
标题翻译：数字彩色图像的顺序产品代码量化
公开(公告)号：US5544284A
公开(公告)日：1996-08-06
申请号：US833529
申请日：1992-02-11
申请人： Jan P. Allebach , Charles A. Bouman , Thyagarajan Balasubramanian
发明人： Jan P. Allebach , Charles A. Bouman , Thyagarajan Balasubramanian
IPC分类号： G09G5/06 , G06T1/00 , G06T5/00 , H04N1/64 , G06F15/00
CPC分类号： H04N1/644
摘要： A digital color image quantization mechanism employs sequential product code vector quantization, to sequentially extract chrominance and luminance values from the vectors and quantizes chrominance and luminance features based upon a conditional distribution of these features within partitioned regions of chrominance/luminance color space. The mechanism sequentially partitions a histogram of the original digital color image in luminance, chrominance (Y,Cb,Cr) space coordinates into a plurality of sub-regions or color space cells, such that each partitioned color cell is associated with a color of the output palette through which the color composition of a reproduced color image is defined. A splitting criterion determines the sequential order of partitioning of an axis. Because of the increased sensitivity of the human visual system to contouring artifacts in regions of an image to low spatial activity, the splitting criterion along the luminance axis is scaled or weighted in inverse proportion to the average spatial activity of the luminance-chrominance region subject to be split. A map of chrominance and luminance output codes is generated for the respective pixels of the output color image in accordance with the axial splitting or quantization of the chrominance and luminance components of the histogram.
摘要翻译：数字彩色图像量化机构采用顺序乘积码矢量量化，从色度和亮度色彩空间分割区域内的这些特征的条件分布，顺序地从矢量中提取色度和亮度值，并量化色度和亮度特征。该机构将亮度，色度（Y，Cb，Cr）空间坐标中的原始数字彩色图像的直方图依次分割成多个子区域或色彩空间单元，使得每个分割的彩色单元与输出调色板，通过该调色板定义再现的彩色图像的颜色组成。分割标准确定轴的分割顺序。由于人类视觉系统对图像区域中的伪像的敏感性增加到低空间活动，所以沿着亮度轴的分割准则被缩放或加权，与受到受限制的亮度色度区域的平均空间活动成反比分裂根据直方图的色度和亮度分量的轴向分割或量化，为输出彩色图像的各个像素生成色度和亮度输出代码的映射。

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