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公开(公告)号：US07436549B2
公开(公告)日：2008-10-14
申请号：US11247552
申请日：2005-10-11
IPC分类号： H04N1/46
CPC分类号： H04N1/6033 , H04N2201/3269
摘要： A color calibration job identification system and method are provided, wherein the job identification data is encoded on a printed page, in a patch code, along with color targets, according to a protocol and format approximately identical to a format of the color targets. The patch code comprises a first portion, including a start code, and a second portion, including job identification data. The first portion of the patch code is comprised of two or more small color patches, each having a predefined color. The second portion of the patch code is comprised of two or more small color patches wherein each of the patches is comprised of a color selected from a plurality of colors, wherein each of the colors is indicative of a unique datum value, preferably an octal digit. The system provides a means for determining correct functioning of a printer and a means for determining an orientation of a printed page in a scanning device.
摘要翻译： 提供了一种颜色校准作业识别系统和方法，其中根据与彩色目标的格式大致相同的协议和格式，将作业识别数据与打印页面，拼图代码以及颜色目标一起编码。 补丁码包括包括起始码的第一部分和包括作业识别数据的第二部分。 补丁代码的第一部分由两个或更多个小颜色补丁组成，每个都有一个预定义的颜色。 补丁代码的第二部分由两个或更多个小的色块组成，其中每个补丁由选自多种颜色的颜色组成，其中每种颜色表示唯一的基准值，优选地是八进制数 。 该系统提供用于确定打印机的正确功能的装置和用于确定扫描装置中的打印页面的方位的装置。
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公开(公告)号：US07215440B2
公开(公告)日：2007-05-08
申请号：US09750552
申请日：2000-12-28
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。
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13.发明授权Color-balanced TRC correction to compensate for illuminant changes in printer characterization 有权彩色平衡TRC校正，以补偿打印机表征中的光源变化公开(公告)号：US07064860B1
公开(公告)日：2006-06-20
申请号：US09571125
申请日：2000-05-15
IPC分类号： H04N1/40
CPC分类号： H04N1/40 , H04N1/6008 , H04N1/6027 , H04N1/6033 , H04N1/6088
摘要： A color marking device includes a color balance controller which adjusts the TRC linearization in accordance with an intended illuminant for viewing the output of the device. The system comprises a front end converter for converting an input signal representative of a target image comprised to preselect the color into a device dependent control system in accordance with the device TRC. The device TRC is selected in accordance with a signal identifying the intended illuminant for the output.
摘要翻译： 颜色标记装置包括色平衡控制器，该色平衡控制器根据用于观察装置的输出的预期光源来调整TRC线性化。 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系统。 根据识别输出的预期光源的信号来选择装置TRC。
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公开(公告)号：US06766051B2
公开(公告)日：2004-07-20
申请号：US09731346
申请日：2000-12-06
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。
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公开(公告)号：US06707938B2
公开(公告)日：2004-03-16
申请号：US09731340
申请日：2000-12-06
IPC分类号： G06K900
CPC分类号： G06K9/00 , G09G5/02 , H04N1/6016 , H04N9/68
摘要： A simplified color space transformation method uses a principal axis or dominating parameter in a first color space to determine the value of an associated axis in a second color space. Transformation curves relating the principal axis to the associated second space axis are predetermined and stored. Each curve describes the relationship between the principal axis and the associated axis given certain values for remaining, secondary or non-principal first color space axes. In operation the non-principal axes are used to calculate index values. For example, the non-principal values are quantized. The index values are used to access an appropriate curve. The principal axis value is used as an index into the appropriate curve. An image processor operative to perform the method comprises a transformation curve library. Software modules running on a computational device, such as, a microprocessor or digital signal processor analyze image pixels and access appropriate curves for use in transforming the pixel into a new color space.
摘要翻译： 简化的颜色空间变换方法使用第一颜色空间中的主轴或主导参数来确定第二颜色空间中相关联的轴的值。 将主轴与相关联的第二空间轴相关联的变换曲线是预定的并被存储。 每个曲线描述了主轴和相关轴之间的关系，给出了剩余的，次要的或非主要的第一个颜色空间轴的某些值。 在运行时，非主轴用于计算指标值。 例如，非主要值被量化。 索引值用于访问适当的曲线。 主轴值用作适当曲线的指标。 可操作以执行该方法的图像处理器包括变换曲线库。 在诸如微处理器或数字信号处理器的计算设备上运行的软件模块分析图像像素并访问适当的曲线以用于将像素转换成新的颜色空间。
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公开(公告)号：US06295137B1
公开(公告)日：2001-09-25
申请号：US09210006
申请日：1998-12-11
IPC分类号： H04N140
CPC分类号： H04N1/40 , H04N1/6019
摘要： A method is proposed for reducing the cost of color transformations implemented by multi-dimensional lookup tables, especially in the case where the input space is a luminance-chrominance color space. Multilevel halftoning is applied to the two chrominance coordinates in order to map them to the chrominance node values of the lookup table. Multilevel chrominance halftoning introduces chrominance errors at high spatial frequencies, where the human visual system is insensitive. 1-D interpolation is then applied on the luminance coordinate to obtain the output color value. This method therefore reduces 3-D interpolation to halftoning and 1-D interpolation, thereby saving computational cost without introducing objectionable image error.
摘要翻译： 提出了一种降低由多维查找表实现的颜色变换成本的方法，特别是在输入空间是亮度 - 色度色彩空间的情况下。 将多级半色调应用于两个色度坐标，以便将它们映射到查找表的色度节点值。 多级色度半色调在高空间频率下引入色度误差，其中人类视觉系统不敏感。 然后将1-D内插应用于亮度坐标以获得输出颜色值。 因此，该方法可以减少3-D插值到半色调和1-D插值，从而节省计算成本，而不会引起令人反感的图像误差。
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公开(公告)号：US06195456B1
公开(公告)日：2001-02-27
申请号：US08770768
申请日：1996-12-19
IPC分类号： G06K900
CPC分类号： G06K9/00 , G06T5/007 , G06T5/10 , G06T2207/10024 , G06T2207/20064 , H04N1/6019 , H04N1/603 , H04N1/64
摘要： Color printing systems frequently use multiresolution analysis, which creates intermediate lower resolution images, in applications such as descreening and filtering. The typical steps are to decompose the original image into sub bands, apply the application to one or more sub bands and then recompose the image, prior to color correction and color space transformation. This disclosure describes applying the color correction to one of the lower resolution sub bands and a simpler color space transformation to the final image as a way to reduce the amount of computation. The described multiresolution analysis is a wavelet transform.
摘要翻译： 彩色打印系统经常使用多分辨率分析，在分析和过滤等应用中创建中间较低分辨率的图像。 典型的步骤是将原始图像分解为子带，将应用应用于一个或多个子带，然后在颜色校正和颜色空间转换之前重构图像。 本公开内容描述了将颜色校正应用于较低分辨率子带中的一个，并将更简单的色空间变换应用于最终图像，作为减少计算量的一种方式。 所描述的多分辨率分析是小波变换。
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18.发明授权System for printing color images with extra colorants in addition to primary colorants 失效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
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。
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19.发明授权公开(公告)号：US07085004B2
公开(公告)日：2006-08-01
申请号：US09725998
申请日：2000-11-29
CPC分类号： H04N1/00015 , G03G2215/066 , G06K15/00 , H04N1/00002 , H04N1/00023 , H04N1/00031 , H04N1/00045 , H04N1/00053 , H04N1/00087 , H04N1/6033
摘要： A method and system validates an output used in calibrating a document processing system (DPS). The calibration target is generated for assessing the range of outputs of the DPS. The target comprises a plurality of target elements and element orientation information representing a physical layout of the target elements in a DPS output. The DPS output is generated in accordance with the calibration target. The characteristic values of the DPS output are measured corresponding to the individual target elements. If a mis-ordering of the measurements of the target elements is identified, the measurements of the target element of the DPS are reordered in accordance with the desired order for computing an appropriate calibration function without requirement of re-measurement.
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公开(公告)号：US07072072B1
公开(公告)日：2006-07-04
申请号：US09562198
申请日：2000-05-02
CPC分类号： H04N1/4092
摘要： A pure rendering intent is used to render text and line art in color imaging systems. A CMY image goes through a one hundred percent under color removal process creating a CMYK image. The CMYK image is processed by a set of clamping tone reproduction curves. The clamping tone reproduction curves shift nearly saturated colors to total saturation. The result is a rendering of text and line art that has improved clarity and legibility.
摘要翻译： 纯粹的渲染意图用于在彩色成像系统中渲染文本和线条艺术。 CMY图像在颜色去除过程中经历百分之百创建CMYK图像。 CMYK图像由一组夹紧色调再现曲线处理。 夹紧色调再现曲线将几乎饱和的颜色移动到总饱和度。 结果是提高了清晰度和易读性的文本和线条艺术。
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