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71. 发明授权

US06962400B2 Sub-dot phase modulation for computer to plate inkjet system 有权
标题翻译：计算机到平板喷墨系统的子点相位调制
公开(公告)号：US06962400B2
公开(公告)日：2005-11-08
申请号：US10667261
申请日：2003-09-17
申请人： Luc Minnebo , Koen Vande Velde , Paul Delabastita
发明人： Luc Minnebo , Koen Vande Velde , Paul Delabastita
IPC分类号： B41J2/205 , B41J29/38 , B41N1/00 , G06K15/00 , H04N1/40 , H04N1/405
CPC分类号： H04N1/4057 , H04N1/40087 , H04N1/4052
摘要： Printing masters are produced by use of an inkjet printing system.The smallest halftone dot size which can be printed by the inkjet printing system is larger than the size of a pixel of the recording grid defined by the addressability of the printing device.The error diffusion algorithm is especially adapted to make use of the high addressability of the recording system.Using a sub-dot phase modulated error diffusion halftoning algorithm allows for the distance between the halftone dots to be modulated in much smaller increments than the size of the halftone dots themselves.Results can be further improved by dynamically influencing the threshold value in the error diffusion algorithm in accordance with previous output quantisation determinations.Variable coverage percentage of the pixels can be taken into account.The method can be extended to multilevel systems.
摘要翻译：印刷大师通过使用喷墨打印系统生产。可以由喷墨打印系统打印的最小的半色调点尺寸大于由打印设备的可寻址性定义的记录格栅的像素的尺寸。误差扩散算法特别适用于利用记录系统的高可寻址性。使用子点相位调制误差扩散半色调算法允许半色调点之间的距离以比半色调点本身的大小更小的增量进行调制。通过根据先前的输出量化确定动态影响误差扩散算法中的阈值可以进一步改善结果。可以考虑像素的可变覆盖率。该方法可以扩展到多级系统。

72. 发明申请

US20050243376A1 Method and apparatus for half toning image 审中-公开
标题翻译：半色调图像的方法和装置
公开(公告)号：US20050243376A1
公开(公告)日：2005-11-03
申请号：US11046683
申请日：2005-02-01
申请人： Sang-ho Kim
发明人： Sang-ho Kim
IPC分类号： G06K15/12 , H04N1/405 , H04N1/409
CPC分类号： H04N1/4052
摘要： A method and apparatus for half-toning an image is provided having operations for transforming a gray scale image into a binary image, enhancing a resolution of the binary image using a resolution enhancement technology, and diffusing an error between the gray scale image and a resolution-enhanced binary image. Thus, resolution enhancement technology (RET) is accounted for in an image half-toning algorithm so that image forming apparatuses (for example, a printer or a multi-function machine), or displays to which the RET is applied, can output an image of optimal quality.
摘要翻译：提供一种用于半色调图像的方法和装置，其具有将灰度图像变换为二进制图像的操作，使用分辨率增强技术增强二值图像的分辨率，并且在灰度图像和分辨率之间扩散误差增强的二进制图像。因此，在图像半色调算法中考虑分辨率增强技术（RET），使得应用了RET的图像形成装置（例如打印机或多功能机器）或显示器可以输出图像的最优质量。

73. 发明授权

US06956674B1 Image processor capable of reducing gradation at high speed 有权
标题翻译：图像处理器能够以高速度降低灰度
公开(公告)号：US06956674B1
公开(公告)日：2005-10-18
申请号：US09692052
申请日：2000-10-20
申请人： Atsushi Ishikawa
发明人： Atsushi Ishikawa
IPC分类号： B41J2/52 , G06T5/00 , H04N1/40 , H04N1/405
CPC分类号： H04N1/4052
摘要： An image processor employing error diffision is provided with a multivalued dithering part, for reducing the bit number of computing in a feedback loop for errors. Thus, an operation can be performed at a high speed while the capacity of an error storage memory can be reduced.
摘要翻译：采用错误差分的图像处理器具有多值抖动部分，用于减少用于错误的反馈回路中的计算的位数。因此，可以在降低错误存储存储器的容量的同时高速地执行操作。

74. 发明授权

US06914700B2 Method for reducing migrating residual error in error diffusion halftoning 有权
标题翻译：减少错误扩散半色调中残留误差迁移的方法
公开(公告)号：US06914700B2
公开(公告)日：2005-07-05
申请号：US10417843
申请日：2003-04-17
申请人： Khageshwar Thakur
发明人： Khageshwar Thakur
IPC分类号： H04N1/405 , H04N1/409
CPC分类号： H04N1/409 , H04N1/4052
摘要： A method for reducing or eliminating residual error when “blank” pixels are found in the input image data is provided, such as one that can be used in printers of the type which use error diffusion as part of the halftoning process. When a blank pixel is found, the residual error may be immediately reduced in magnitude in one embodiment. In another embodiment, a “hop count” value is increased (or incremented) when a blank pixel is found, and if sufficient consecutive blank pixels exist in the input data, the hop count achieves a threshold and then either decimates or eliminates the residual error, thus limiting the migration of residual error. If a non-blank pixel is found in the input data before the threshold is achieved, the hop count is reset to zero.
摘要翻译：提供了一种用于在输入图像数据中发现“空白”像素时减少或消除残差的方法，例如可以在使用误差扩散作为半色调处理的一部分的打印机中使用的方法。当找到空白像素时，在一个实施例中可以立即减小残差。在另一个实施例中，当找到空白像素时，增加（或递增）“跳计数”值，并且如果在输入数据中存在足够的连续空白像素，则跳计数达到阈值，然后抽取或消除残差，从而限制了残差的迁移。如果在达到阈值之前在输入数据中找到非空白像素，则跳数被重置为零。

75. 发明申请

US20050122546A1 Image processing mechanism for image enhancement and halftone processing 审中-公开
标题翻译：图像增强和半色调处理的图像处理机制
公开(公告)号：US20050122546A1
公开(公告)日：2005-06-09
申请号：US10819298
申请日：2004-04-07
申请人： Hsiao-Yu Han , Jane Chang , Jessen Chen , Yu-Chu Huang , Shyh-Hsing Wang , Yao-Wen Huang
发明人： Hsiao-Yu Han , Jane Chang , Jessen Chen , Yu-Chu Huang , Shyh-Hsing Wang , Yao-Wen Huang
IPC分类号： H04N1/40 , H04N1/405 , H04N1/409 , G06T5/00
CPC分类号： H04N1/40 , H04N1/4052 , H04N1/4092
摘要： An image processing mechanism combines the halftone method and image enhancement technique for processing halftone and improving image performance. The mechanism includes an image input module, an image enhancement module and a halftone module. The image input module sends the original image data to the image enhancement module to enhance the image by filtering. The halftone module processes the enhanced image data by the algorithm of error diffusion. It combines two different processes into one mechanism to simplify the hardware architecture and to decrease the usage of memory.
摘要翻译：图像处理机构结合了用于处理半色调的半色调方法和图像增强技术，并提高了图像性能。该机构包括图像输入模块，图像增强模块和半色调模块。图像输入模块将原始图像数据发送到图像增强模块，以通过滤波来增强图像。半色调模块通过误差扩散算法处理增强图像数据。它将两个不同的进程组合成一个机制，以简化硬件架构并减少内存的使用。

76. 发明授权

US06870641B2 Image processing apparatus, method of image processing, print control apparatus, and recording media 失效
标题翻译：图像处理装置，图像处理方法，打印控制装置和记录介质
公开(公告)号：US06870641B2
公开(公告)日：2005-03-22
申请号：US09967888
申请日：2001-09-28
申请人： Toshiaki Kakutani
发明人： Toshiaki Kakutani
IPC分类号： B41J2/52 , G06F3/12 , G06T5/00 , H04N1/40 , H04N1/405 , G06K15/00
CPC分类号： H04N1/4052
摘要： The technique of the present invention temporarily registers a tone error, which arises in each pixel due to determination of the dot on-off state in the pixel, in an intermediate buffer. The technique calculates diffusion errors or error divisions, which are diffused to each of non-processed pixels in a neighborhood of a preset number of pixels, from tone errors arising in the preset number of pixels, and writes the error divisions into an error buffer. One procedure diffuses each tone error into the intermediate buffer in response to every occurrence of the tone error, and subsequently writes the diffused error divisions into the error buffer. Another procedure registers tone errors arising in the preset number of pixels in the intermediate buffer and writes the error divisions, which are calculated from the registered tone errors with regard to the preset number of pixels, into the error buffer. Compared with the conventional technique that diffuses each tone error into the error buffer in response to every occurrence of the tone error, either of these procedures enables collective diffusion of the tone errors with regard to the preset number of pixels, thus ensuring higher-speed diffusion of the tone error. The error diffusion may be attained by utilizing a procedure mathematically equivalent to the least mean square error method.
摘要翻译：本发明的技术在中间缓冲器中暂时记录由于像素中的点开关状态的确定而在每个像素中产生的色调误差。该技术从预设数量的像素中产生的色调误差计算扩散误差或误差分布，其扩散到预设像素数目附近的未处理像素中的每一个，并将误差分区写入错误缓冲器。一个程序响应于每一次出现的色调误差而将每个色调误差扩散到中间缓冲器中，然后将扩散的误差分区写入误差缓冲器。另一个过程注册在中间缓冲器中预设的像素数量中产生的音调错误，并且将从预设的像素数的注册音调误差计算的误差写入错误缓冲器。与传统技术相比，将每个音色误差扩散到误差缓冲器中以响应每一次出现的色调误差，这两个过程中的任何一个都能使色调误差相对于预设像素数的集合扩散，从而确保更高速度的扩散的音色错误。误差扩散可以通过利用数学上等价于最小均方误差法的程序来实现。

77. 发明申请

US20040207880A1 Method for reducing migrating residual error in error diffusion halftoning 有权
标题翻译：减少错误扩散半色调中残留误差迁移的方法
公开(公告)号：US20040207880A1
公开(公告)日：2004-10-21
申请号：US10417843
申请日：2003-04-17
发明人： Khageshwar Thakur
IPC分类号： H04N001/405 , H04N001/409 , H04N001/52 , H04N001/58
CPC分类号： H04N1/409 , H04N1/4052
摘要： A method for reducing or eliminating residual error when nullblanknull pixels are found in the input image data is provided, such as one that can be used in printers of the type which use error diffusion as part of the halftoning process. When a blank pixel is found, the residual error may be immediately reduced in magnitude in one embodiment. In another embodiment, a nullhop countnull value is increased (or incremented) when a blank pixel is found, and if sufficient consecutive blank pixels exist in the input data, the hop count achieves a threshold and then either decimates or eliminates the residual error, thus limiting the migration of residual error. If a non-blank pixel is found in the input data before the threshold is achieved, the hop count is reset to zero.
摘要翻译：提供了一种用于在输入图像数据中发现“空白”像素时减少或消除残差的方法，例如可以在使用误差扩散作为半色调处理的一部分的打印机中使用的方法。当找到空白像素时，在一个实施例中可以立即减小残差。在另一个实施例中，当找到空白像素时，增加（或递增）“跳计数”值，并且如果在输入数据中存在足够的连续空白像素，则跳计数达到阈值，然后抽取或消除残差，从而限制了残差的迁移。如果在达到阈值之前在输入数据中找到非空白像素，则跳数被重置为零。

78. 发明授权

US06771832B1 Image processor for processing an image with an error diffusion process and image processing method for processing an image with an error diffusion process 失效
标题翻译：用于处理具有误差扩散处理图像的图像处理器和用于利用误差扩散处理处理图像的图像处理方法
公开(公告)号：US06771832B1
公开(公告)日：2004-08-03
申请号：US09615908
申请日：2000-07-13
申请人： Yoshikazu Naito , Shinichi Sato , Fumiko Koshimizu
发明人： Yoshikazu Naito , Shinichi Sato , Fumiko Koshimizu
IPC分类号： G06K936
CPC分类号： H04N1/52 , H04N1/4052
摘要： Error addition section 201 generates correction data by adding correction value Emo and correction value E1 to the input data. Binary processing section 202 converts the correction data to binary data to generate output data. Binary error calculation section 203 calculates binary error E based on the correction data and output data. Propagation coefficient judgment section 204 judges propagation coefficients K1 to K4. Propagation error operation section 205 operates on binary error E and propagation coefficients K1 to K4 to calculate correction value E1 and correction value Emi. Error memory 206 temporarily stores correction value Emi, and outputs it to error addition section 201 when the pixel data to be corrected is input.
摘要翻译：误差加法部201通过将校正值Emo和修正值E1与输入数据相加来生成校正数据。二进制处理部分202将校正数据转换成二进制数据以产生输出数据。二进制误差计算部203基于校正数据和输出数据计算二进制误差E. 传播系数判断部204判断传播系数K1〜K4。传播误差操作部分205对二进制误差E和传播系数K1至K4进行操作，以计算校正值E1和校正值Emi。错误存储器206临时存储校正值Emi，并且当输入要校正的像素数据时将其输出到误差加法部201。

79. 发明申请

US20040008382A1 System and method for error diffusion screening with parallel processing 审中-公开
标题翻译：用并行处理进行误差扩散筛选的系统和方法
公开(公告)号：US20040008382A1
公开(公告)日：2004-01-15
申请号：US10260702
申请日：2002-09-30
发明人： Thomas Samuel Barbalet
IPC分类号： H04N001/405 , G06F009/28
CPC分类号： H04N1/4052
摘要： A system and method for error diffusion screening with parallel processing, in which the calculation of an error diffused output image is divided into two distinct processes. A first process is used to calculate the tone value for an output pixel based only on a corresponding input pixel value. The second process is used to the manage distribution and application of the error terms to output values. The error arising from each pixel is apportioned among its neighbors entirely within the error array. As a result, the two processes run simultaneously, provided that the second process does not start to use the error term for any particular pixel until the first process has complete the calculation of the error term.
摘要翻译：一种用于并行处理的误差扩散筛选的系统和方法，其中将误差扩散输出图像的计算分为两个不同的过程。使用第一处理仅基于相应的输入像素值来计算输出像素的色调值。第二个过程用于管理误差项到输出值的分配和应用。每个像素产生的错误在其邻居之间完全在错误数组内分配。因此，两个进程同时运行，前提是第二个进程在第一个进程已经完成了错误项的计算之前没有开始对任何特定的像素使用错误项。

80. 发明申请

US20030202027A1 Image processing apparatus and method 失效
标题翻译：图像处理装置及方法
公开(公告)号：US20030202027A1
公开(公告)日：2003-10-30
申请号：US10420729
申请日：2003-04-23
申请人： CANON KABUSHIKI KAISHA
发明人： Toshinori Igari
IPC分类号： B41J002/205
CPC分类号： H04N1/4052 , G06K15/00 , G06K15/021 , G06K15/1817
摘要： Entered image data is stored in a page buffer on a per-page basis, and image data that has been stored in the page buffer is subjected to error diffusion processing on a per-raster basis, thereby creating and outputting binarized data. Sub-scanning direction error due to error diffusion processing is stored in an error buffer at the time of binarization. The error buffer is initialized based upon positions, in the sub-scanning direction, of a raster that underwent error diffusion processing immediately previously and a raster to undergo error diffusion processing, and the number of rasters on a page. As a result, it is possible to avoid a deterioration in image quality at page boundaries and at the beginning of an image simultaneously when data for printing on elongated sheets of paper is processed.
摘要翻译：输入的图像数据以每页为单位存储在页面缓冲器中，并且已经存储在页面缓冲器中的图像数据在每个光栅的基础上进行错误扩散处理，从而创建并输出二值化数据。由于误差扩散处理引起的副扫描方向误差在二值化时存储在误差缓冲器中。错误缓冲器是基于在副扫描方向上进行刚刚进行误差扩散处理的光栅和进行误差扩散处理的栅格以及页面上的栅格数量的位置来初始化的。结果，当处理用于在细长纸张上打印的数据时，可以同时避免在页边界处和图像开始处图像质量的劣化。

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