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公开(公告)号：US09030516B2
公开(公告)日：2015-05-12
申请号：US13166033
申请日：2011-06-22
IPC分类号： B41J2/385 , G03G13/04 , G03G15/043 , H04N1/401 , H04N1/405 , H04N1/407 , G06K15/02 , G06K15/12
CPC分类号： G03G15/043 , G06K15/1209 , G06K15/1247 , G06K15/1868 , G06K15/1881 , H04N1/4015 , H04N1/405 , H04N1/407
摘要： Compensation is performed for nonuniformity in a printer. The printer has a photoreceptor and a print head with a plurality of different light sources, each light source capable of producing a plurality of different levels of light. A plurality of stored gain control signals for each light source are related to the light output of that light source. Print job data includes screened pixel levels and a halftone screen specification. The stored gain control signals are adjusted based on the halftone screen specification. The screened pixel levels are modified using the adjusted gain control signals to provide engine pixel levels. Those levels are provided to corresponding light sources to expose the photoreceptor in respective pixel areas with light corresponding to the compensated pixel levels.
摘要翻译： 对打印机的不均匀性进行补偿。 打印机具有感光体和具有多个不同光源的打印头，每个光源能够产生多个不同级别的光。 用于每个光源的多个存储的增益控制信号与该光源的光输出有关。 打印作业数据包括屏蔽像素级别和半色调屏幕规格。 存储的增益控制信号根据半色调屏幕规格进行调整。 使用调整后的增益控制信号修改屏蔽像素级，以提供引擎像素级。 这些电平被提供给相应的光源，以使与相应于补偿的像素电平相对应的光曝光在各个像素区域中的感光体。
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公开(公告)号：US08493623B2
公开(公告)日：2013-07-23
申请号：US12577233
申请日：2009-10-12
申请人： Chung-Hui Kuo , Hwai-Tzuu Tai , Stacy M. Munechika , Cumar Sreekumar , Eric K. Zeise , Stephen J. Farnand , Thomas A. Henderson
发明人： Chung-Hui Kuo , Hwai-Tzuu Tai , Stacy M. Munechika , Cumar Sreekumar , Eric K. Zeise , Stephen J. Farnand , Thomas A. Henderson
IPC分类号： H04N1/40
CPC分类号： H04N1/4015 , G03G15/5062 , G03G2215/00063 , G03G2215/00067 , G06K15/1247
摘要： One or more printers or printing systems are connected to a scanning device. Each printer includes one or more color modules that are used during a printing operation. A printer prints a target for each color module or color channel. The printed targets are then scanned by the scanning device. The printed targets may be rotated to any angle and then scanned by the scanning device. The scanned raster data is processed by a controller to detect non-uniformities in at least one density image and to generate one or more correction profiles for the printer. When an image is to be printed, one or more controllers receive the image data and use the one or more correction profiles to correct or compensate for the non-uniformities during the exposure process.
摘要翻译： 一个或多个打印机或打印系统连接到扫描设备。 每个打印机包括在打印操作期间使用的一个或多个颜色模块。 打印机打印每个颜色模块或颜色通道的目标。 打印的目标然后由扫描装置扫描。 打印的目标物可以旋转任何角度，然后由扫描装置扫描。 扫描的光栅数据由控制器处理以检测至少一个密度图像中的不均匀性，并为打印机生成一个或多个校正配置文件。 当要打印图像时，一个或多个控制器接收图像数据，并使用一个或多个校正配置文件来校正或补偿曝光过程中的不均匀性。
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公开(公告)号：US20110235059A1
公开(公告)日：2011-09-29
申请号：US12748762
申请日：2010-03-29
申请人： Hwai-Tzuu Tai , Chung-Hui Kuo , Stacy M. Munechika
发明人： Hwai-Tzuu Tai , Chung-Hui Kuo , Stacy M. Munechika
IPC分类号： G06F3/12
CPC分类号： H04N1/4015
摘要： Screened hardcopy reproduction apparatus for applying toner to a receiver using a print engine that may not apply toner uniformly, so the toner applied to the receiver has a non-uniformity. A controller receives an input pixel level and a corresponding input pixel location; a tone-reproduction unit calculates an output pixel level from the input pixel level and a corresponding output pixel location from the input pixel location; a compensator calculates a compensated pixel level from the output pixel level and the output pixel location; and a screening unit calculates a screened pixel level and a screened pixel location from the compensated pixel level, the output pixel location, and a selected screening pattern. The print engine applies an amount of the toner corresponding to the screened pixel level and the non-uniformity to the receiver at a toner location corresponding to the screened pixel location to compensate for the non-uniformity.
摘要翻译： 使用可能不能均匀地施加调色剂的打印引擎将调色剂施加到接收器的屏蔽硬拷贝再现设备，因此施加到接收器的调色剂具有不均匀性。 控制器接收输入像素级和对应的输入像素位置; 色调再现单元从输入像素位置计算输出像素级别和相应的输出像素位置; 补偿器从输出像素级和输出像素位置计算补偿像素级; 并且筛选单元从补偿的像素级，输出像素位置和所选择的筛选模式计算筛选的像素级别和筛选的像素位置。 打印引擎在对应于被筛选的像素位置的调色剂位置处将与筛选的像素级别和不均匀性相对应的一定量的调色剂施加到接收器以补偿不均匀性。
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公开(公告)号：US20100097657A1
公开(公告)日：2010-04-22
申请号：US12577233
申请日：2009-10-12
申请人： Chung-Hui Kuo , Hwai-Tzuu Tai , Stacy M. Munechika , Cumar Sreekumar , Eric K. Zeise , Stephen J. Farnand , Thomas A. Henderson
发明人： Chung-Hui Kuo , Hwai-Tzuu Tai , Stacy M. Munechika , Cumar Sreekumar , Eric K. Zeise , Stephen J. Farnand , Thomas A. Henderson
IPC分类号： G06F15/00
CPC分类号： H04N1/4015 , G03G15/5062 , G03G2215/00063 , G03G2215/00067 , G06K15/1247
摘要： One or more printers or printing systems are connected to a scanning device. Each printer includes one or more color modules that are used during a printing operation. A printer prints a target for each color module or color channel. The printed targets are then scanned by the scanning device. The printed targets may be rotated to any angle and then scanned by the scanning device. The scanned raster data is processed by a controller to detect non-uniformities in at least one density image and to generate one or more correction profiles for the printer. When an image is to be printed, one or more controllers receive the image data and use the one or more correction profiles to correct or compensate for the non-uniformities during the exposure process.
摘要翻译： 一个或多个打印机或打印系统连接到扫描设备。 每个打印机包括在打印操作期间使用的一个或多个颜色模块。 打印机打印每个颜色模块或颜色通道的目标。 打印的目标然后由扫描装置扫描。 打印的目标物可以旋转任何角度，然后由扫描装置扫描。 扫描的光栅数据由控制器处理以检测至少一个密度图像中的不均匀性，并为打印机生成一个或多个校正配置文件。 当要打印图像时，一个或多个控制器接收图像数据，并使用一个或多个校正配置文件来校正或补偿曝光过程中的不均匀性。
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公开(公告)号：US08736894B2
公开(公告)日：2014-05-27
申请号：US13331075
申请日：2011-12-20
IPC分类号： G06K15/02
CPC分类号： H04N1/506 , G03G15/0194 , G03G15/5062
摘要： Correction data is produced for density errors in prints produced using a printer. While printing a test image, the periods of rotation of one or more rotatable imaging members arranged along a receiver feed path in the printer are measured using respective period sensors. The printed test image is measured along a selected measurement direction and a reproduction error signal representing deviation from aim density is determined. For each period sensor, the autocorrelation of the reproduction error signal for the corresponding period is determined. If the determined autocorrelation exceeds a selected threshold, the reproduction error signal is decomposed at the corresponding period to extract the variation from the measured component. The remaining error signal is separated by frequency terms. The variations from the data at measured periods and the remaining error signal are used to produce a correction signal.
摘要翻译： 使用打印机生产的打印件中的密度误差产生校正数据。 在打印测试图像时，使用各自的周期传感器测量沿着打印机中的接收器馈送路径布置的一个或多个可旋转成像构件的旋转周期。 沿所选的测量方向测量打印的测试图像，并且确定表示偏离目标密度的再现误差信号。 对于每个周期传感器，确定相应周期的再现误差信号的自相关。 如果所确定的自相关超过选定的阈值，则在相应的周期分解再现误差信号以从测量的分量中提取变化。 剩余的误差信号由频率项分隔。 使用测量周期的数据和剩余误差信号的变化产生校正信号。
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公开(公告)号：US08482802B2
公开(公告)日：2013-07-09
申请号：US12748762
申请日：2010-03-29
申请人： Hwai-Tzuu Tai , Chung-Hui Kuo , Stacy M. Munechika
发明人： Hwai-Tzuu Tai , Chung-Hui Kuo , Stacy M. Munechika
CPC分类号： H04N1/4015
摘要： Screened hardcopy reproduction apparatus for applying toner to a receiver using a print engine that may not apply toner uniformly, so the toner applied to the receiver has a non-uniformity. A controller receives an input pixel level and a corresponding input pixel location; a tone-reproduction unit calculates an output pixel level from the input pixel level and a corresponding output pixel location from the input pixel location; a compensator calculates a compensated pixel level from the output pixel level and the output pixel location; and a screening unit calculates a screened pixel level and a screened pixel location from the compensated pixel level, the output pixel location, and a selected screening pattern. The print engine applies an amount of the toner corresponding to the screened pixel level and the non-uniformity to the receiver at a toner location corresponding to the screened pixel location to compensate for the non-uniformity.
摘要翻译： 使用可能不能均匀地施加调色剂的打印引擎将调色剂施加到接收器的屏蔽硬拷贝再现设备，因此施加到接收器的调色剂具有不均匀性。 控制器接收输入像素级和对应的输入像素位置; 色调再现单元从输入像素位置计算输出像素级别和相应的输出像素位置; 补偿器从输出像素级和输出像素位置计算补偿像素级; 并且筛选单元从补偿的像素级，输出像素位置和所选择的筛选模式计算筛选的像素级别和筛选的像素位置。 打印引擎在对应于被筛选的像素位置的调色剂位置处将与筛选的像素级别和不均匀性相对应的一定量的调色剂施加到接收器以补偿不均匀性。
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公开(公告)号：US20130155422A1
公开(公告)日：2013-06-20
申请号：US13331075
申请日：2011-12-20
IPC分类号： G06K15/02
CPC分类号： H04N1/506 , G03G15/0194 , G03G15/5062
摘要： Correction data is produced for density errors in prints produced using a printer. While printing a test image, the periods of rotation of one or more rotatable imaging members arranged along a receiver feed path in the printer are measured using respective period sensors. The printed test image is measured along a selected measurement direction and a reproduction error signal representing deviation from aim density is determined. For each period sensor, the autocorrelation of the reproduction error signal for the corresponding period is determined. If the determined autocorrelation exceeds a selected threshold, the reproduction error signal is decomposed at the corresponding period to extract the variation from the measured component. The remaining error signal is separated by frequency terms. The variations from the data at measured periods and the remaining error signal are used to produce a correction signal.
摘要翻译： 使用打印机生产的打印件中的密度误差产生校正数据。 在打印测试图像时，使用各自的周期传感器测量沿着打印机中的接收器馈送路径布置的一个或多个可旋转成像构件的旋转周期。 沿所选的测量方向测量打印的测试图像，并且确定表示偏离目标密度的再现误差信号。 对于每个周期传感器，确定相应周期的再现误差信号的自相关。 如果所确定的自相关超过选定的阈值，则在相应的周期分解再现误差信号以从测量的分量中提取变化。 剩余的误差信号由频率项分隔。 使用测量周期的数据和剩余误差信号的变化产生校正信号。
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8.发明申请公开(公告)号：US20110235060A1
公开(公告)日：2011-09-29
申请号：US12748786
申请日：2010-03-29
申请人： Hwai-Tzuu Tai , Chung-Hui Kuo , Stacy M. Munechika
发明人： Hwai-Tzuu Tai , Chung-Hui Kuo , Stacy M. Munechika
IPC分类号： G06F3/12
CPC分类号： H04N1/4015
摘要： A method of calculating compensation data for compensating for spatial print engine non-uniformity of an image applied by a print engine to a receiver. A test target has two test areas of different output densities, each with a single output pixel level. A relationship between output density and output pixel level for the print engine is determined, and is used to calculate the output pixel level for each test area from the respective output density. The test target is printed, and the reproduced densities of the test areas are measured at a plurality of different locations in each area. A processor is used to calculate the compensation data using the measured densities. The compensation data defines a relationship between an output pixel location on the receiver, an output pixel level, and a compensated pixel level.
摘要翻译： 一种计算用于补偿由打印引擎施加到接收器的图像的空间打印引擎不均匀性的补偿数据的方法。 测试目标具有不同输出密度的两个测试区域，每个具有单个输出像素级别。 确定打印引擎的输出密度和输出像素级之间的关系，并且用于从各自的输出密度计算每个测试区域的输出像素级别。 打印测试目标，并且在每个区域中的多个不同位置处测量测试区域的再现密度。 处理器用于使用测量的密度来计算补偿数据。 补偿数据定义了接收器上的输出像素位置，输出像素级和补偿像素级之间的关系。
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公开(公告)号：US08605333B2
公开(公告)日：2013-12-10
申请号：US13114097
申请日：2011-05-24
申请人： Chung-Hui Kuo , Hwai-Tzuu Tai , John T Hartman
发明人： Chung-Hui Kuo , Hwai-Tzuu Tai , John T Hartman
IPC分类号： H04N1/40
CPC分类号： G03G15/6591 , G03G15/224 , G03G15/5025 , G06K1/121
摘要： Apparatus for depositing a texture on a receiver includes a data source that provides multilevel input tint data values. A lossy compressor produces compressed multilevel tint data values from the multilevel input tint data values. A decompressor produces multilevel decompressed tint data values from the compressed multilevel tint data values. A texture memory receives those values from the decompressor and provides corresponding multilevel texture pixel data values. A print engine deposits at each of a plurality of pixel sites on the receiver an amount of texture-forming material corresponding to the respective multilevel texture pixel data value. A loader loads into the texture memory a texture set including multilevel texture pixel data values for each of a plurality of textures, and each texture in the texture set corresponds to a respective selected range of multilevel decompressed tint data value.
摘要翻译： 用于在接收器上存储纹理的装置包括提供多级输入色调数据值的数据源。 有损压缩器从多级输入色调数据值产生压缩多级色调数据值。 解压缩器从压缩的多级色调数据值产生多级解压缩色调数据值。 纹理存储器从解压缩器接收这些值，并提供相应的多级纹理像素数据值。 印刷引擎在接收器上的多个像素位置的每一个处沉积与多个多层结构像素数据值对应的纹理形成材料的量。 加载器将多个纹理中的每一个纹理集合包含多层纹理像素数据值，纹理集合中的每个纹理对应于多级解压缩色调数据值的相应选定范围。
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公开(公告)号：US07830569B2
公开(公告)日：2010-11-09
申请号：US11394770
申请日：2006-03-31
申请人： Hwai-Tzuu Tai , Chung-Hui Kuo , Dmitri A. Gusev
发明人： Hwai-Tzuu Tai , Chung-Hui Kuo , Dmitri A. Gusev
CPC分类号： G09G5/02 , H04N1/40087 , H04N1/405 , H04N1/4055 , H04N1/46
摘要： A three-dimensional halftone screen is provided that is suited for multilevel printing. The three-dimensional halftone screen includes a plurality of planes each corresponding to one or more input intensity levels of an input RIPped pixel. Within the planes are screen dots, each associated with one or more output exposure intensity values representing an intensity of an exposure dot corresponding to the input RIPped pixel.
摘要翻译： 提供了适用于多层印刷的三维半色调网。 三维半色调屏幕包括多个平面，每个平面对应于输入RIPped像素的一个或多个输入强度级别。 在平面内是屏幕点，每个都与一个或多个输出曝光强度值相关联，表示与输入的RIPped像素对应的曝光点的强度。
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