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1. 发明授权

US08824006B2 Color correction apparatus and color correction method 有权
标题翻译：色彩校正装置和色彩校正方法
公开(公告)号：US08824006B2
公开(公告)日：2014-09-02
申请号：US13207892
申请日：2011-08-11
申请人： Takayuki Sawada , Naofumi Yamamoto
发明人： Takayuki Sawada , Naofumi Yamamoto
IPC分类号： H04N1/46 , G06F3/12 , G03F3/08 , H01J5/16
CPC分类号： H04N1/50 , H04N1/506 , H04N1/6033
摘要： According to one embodiment, a color correction apparatus includes an input portion, a storing portion and a correction portion. The input portion inputs color image signals which correspond to recording color material amounts. The storing portion stores a standard color reproduction parameter for calculating a standard color reproduction chromaticity and reference chromaticity deviation amounts at a plurality of reference color points in recording color material amount coordinate space. The correction portion estimates chromaticity deviation amounts of the input color image signals on the basis of the reference chromaticity deviation amount, calculates a standard chromaticity which corresponds to the input color image signals on the basis of the standard color reproduction parameter and corrects the input color image signals on the basis of the estimated chromaticity deviation amounts and the standard chromaticity.
摘要翻译：根据一个实施例，颜色校正装置包括输入部分，存储部分和校正部分。输入部分输入对应于记录色料量的彩色图像信号。存储部分存储用于计算记录色材量坐标空间中的多个参考色点处的标准色彩再现色度和参考色度偏差量的标准色彩再现参数。校正部根据基准色度偏差量来估计输入彩色图像信号的色度偏差量，根据标准色彩再现参数计算与输入彩色图像信号对应的标准色度，并校正输入彩色图像基于估计色度偏差量和标准色度的信号。

2. 发明授权

US08045242B2 Color conversion apparatus and color conversion method 有权
标题翻译：颜色转换装置和颜色转换方法
公开(公告)号：US08045242B2
公开(公告)日：2011-10-25
申请号：US12900680
申请日：2010-10-08
申请人： Takayuki Sawada
发明人： Takayuki Sawada
IPC分类号： G03F3/08 , G06F15/00 , G06K9/00
CPC分类号： H04N1/56
摘要： A color conversion apparatus includes: an original data analyzing unit configured to extract background color information of an original and color information of a character and line drawing object on the background; a background color changing unit configured to change the background color of the original when necessary, on the basis of the result of comparing the background color information acquired from the original data analyzing unit with a preset threshold value; and a character and line drawing color correcting unit configured to change lightness of the character and line drawing color in a way that increases a lightness difference between the background color for printing and the character and line drawing color on the background when necessary, on the basis of the background color information of the original acquired from the original data analyzing unit, the background color information for printing acquired from the background color changing unit, and the character and line drawing color information on the background acquired from the original data analyzing unit. The color conversion apparatus contributes to saving of color material, reduction in load on a printer engine, prevention of stripping of color material, and prevention of deformation of paper.
摘要翻译：颜色转换装置包括：原始数据分析单元，被配置为在背景上提取字符和线条图对象的原件的背景颜色信息和颜色信息; 基于将从原始数据分析单元获取的背景颜色信息与预设阈值进行比较的结果，根据需要，改变原稿的背景颜色的背景颜色变更单元; 以及字符和线条画颜色校正单元，其被配置为在必要时以增加印刷的背景颜色和背景上的字符和线条画颜色之间的亮度差增加字符和线条画颜色的亮度，基于从原始数据分析单元获取的原稿的背景颜色信息，从背景颜色变化单元获取的用于打印的背景颜色信息以及从原始数据分析单元获取的背景颜色信息。颜色转换装置有助于节省彩色材料，减少打印机引擎上的负荷，防止着色材料剥离，并防止纸张变形。

3. 发明授权

US07570403B2 Color image processing apparatus 失效
标题翻译：彩色图像处理装置
公开(公告)号：US07570403B2
公开(公告)日：2009-08-04
申请号：US11080845
申请日：2005-03-16
申请人： Takayuki Sawada
发明人： Takayuki Sawada
IPC分类号： G03F3/08 , H04N1/40 , H04N1/387 , H04N1/46 , G06K9/00 , G06K9/34
CPC分类号： H04N1/6072
摘要： A color conversion section in an image processing apparatus converts input colors at positions of interest in input color document data to a limited number of colors, on the basis of page layout information that is updated on a page-by-page basis and delivered from a page layout analysis section, a color-assignment table that is updated on a page-by-page basis and delivered from a color-assignment table generating section, and color category attribute information relating to the positions of interest in the input color document data, which is delivered from a color categorizing section.
摘要翻译：图像处理装置中的颜色转换部分基于逐页更新的页面布局信息将输入彩色文档数据中感兴趣的位置的输入颜色转换为有限数量的颜色，并从页面布局分析部分，逐页更新并从颜色分配表生成部分传送的颜色分配表和与输入的彩色文档数据中的感兴趣的位置有关的颜色分类属性信息，它是从颜色分类部分传递的。

4. 发明授权

US07327875B2 Method and apparatus for color conversion 失效
标题翻译：用于颜色转换的方法和装置
公开(公告)号：US07327875B2
公开(公告)日：2008-02-05
申请号：US10721101
申请日：2003-11-26
申请人： Takayuki Sawada
发明人： Takayuki Sawada
IPC分类号： G06K9/00 , G03F3/08
CPC分类号： H04N1/603 , H04N1/6019
摘要： There is disclosed an image processing apparatus of the present invention in which a color region of a range including a color range that can be outputted by an image output device is mapped based on a predetermined mapping function defined between the color region and a color conversion table address space by an address map producing section, so that waste in a color conversion table is inhibited, the number of valid lattice points in the color conversion table increases, and therefore color conversion accuracy is improved.
摘要翻译：公开了一种本发明的图像处理装置，其中基于在颜色区域和颜色转换表之间定义的预定映射函数来映射包括可由图像输出装置输出的颜色范围的范围的颜色区域通过地址映射产生部分的地址空间，使得颜色转换表中的废物被禁止，颜色转换表中的有效格点数量增加，因此提高了颜色转换精度。

5. 发明授权

US07158271B2 Image processing apparatus 有权
标题翻译：图像处理装置
公开(公告)号：US07158271B2
公开(公告)日：2007-01-02
申请号：US10143699
申请日：2002-05-13
申请人： Takayuki Sawada
发明人： Takayuki Sawada
IPC分类号： H04N1/46
CPC分类号： H04N1/6027 , G03G15/011 , G03G15/041 , G03G2215/018 , G03G2215/0424
摘要： R, G and B signals read by a 4-line color CCD sensor are converted into C, M and Y color signals. A black-and-white signal is generated from a luminance signal read by the 4-line color CCD sensor. Densities of the C, M and Y color signals are converted on the basis of the black-and-white signal.
摘要翻译：通过4线彩色CCD传感器读取的R，G和B信号被转换为C，M和Y色彩信号。从由4线彩色CCD传感器读取的亮度信号产生黑白信号。基于黑白信号转换C，M和Y色信号的密度。

6. 发明申请

US20060209125A1 Color image processing apparatus 失效
公开(公告)号：US20060209125A1
公开(公告)日：2006-09-21
申请号：US11080845
申请日：2005-03-16
申请人： Takayuki Sawada
发明人： Takayuki Sawada
IPC分类号： B41J2/21
CPC分类号： H04N1/6072
摘要： A color conversion section in an image processing apparatus converts input colors at positions of interest in input color document data to a limited number of colors, on the basis of page layout information that is updated on a page-by-page basis and delivered from a page layout analysis section, a color-assignment table that is updated on a page-by-page basis and delivered from a color-assignment table generating section, and color category attribute information relating to the positions of interest in the input color document data, which is delivered from a color categorizing section.

7. 发明授权

US07079284B2 Image processing apparatus 失效
公开(公告)号：US07079284B2
公开(公告)日：2006-07-18
申请号：US09973043
申请日：2001-10-10
申请人： Haruko Kawakami , Takayuki Sawada
发明人： Haruko Kawakami , Takayuki Sawada
IPC分类号： G06F15/00
CPC分类号： G06K15/02 , H04N1/40062 , H04N1/6058
摘要： An image processing apparatus which processes a plurality of supplied color image signals and outputs the processed signals to an image forming apparatus. The image processing apparatus comprises a conversion section which converts the supplied color image signals to a plurality of color signals, a discrimination section which discriminates attributes of the supplied color image signals, a determination section which determines, based on the color signals converted by the conversion section, a plurality of color signals outside a color gamut capable of image formation in the image forming apparatus, a processing section which changes the color signals outside the color gamut determined by the determination section to a plurality of color signals in the color gamut of the image forming apparatus in accordance with a discrimination result of the discrimination section, and an output section which matches the color signals from the conversion section and the color signals from the processing section and delivers the matched result to the image forming apparatus.

8. 发明授权

US06724935B1 Color image processing apparatus for performing color adjustment and color conversion processing 有权
标题翻译：用于进行颜色调整和颜色转换处理的彩色图像处理装置
公开(公告)号：US06724935B1
公开(公告)日：2004-04-20
申请号：US09641339
申请日：2000-08-18
申请人： Takayuki Sawada , Hiroki Kanno
发明人： Takayuki Sawada , Hiroki Kanno
IPC分类号： G06K900
CPC分类号： H04N1/60 , G06T11/001
摘要： By using the memory which stores the first lattice point color coordinates data equivalent to the lattice point address of the color conversion LUT data which is referred to at the time of color conversion processing, the color adjustment parameter composition section which composes the color adjustment parameter in accordance with the instruction information of the input color adjustments, and the color adjustment section which outputs the second lattice point coordinates data by conducting color adjustment on the first lattice point color coordinates stored in the memory by using this color adjustment parameter, and after converting the second lattice point color coordinates data to the second lattice point color coordinates data expressed in the second color space, conduct conversion processing on the input image data expressed in the first/color space in accordance with the color conversion LUT data which is renewed by this. It is a color image processing apparatus that possesses at least a color conversion section which outputs the output image data expressed in the second color space. By doing so, color conversion processing only for the color adjustment processing becomes unnecessary. Thus, it is possible to provide an image processing apparatus that can conduct color conversion processing with rapid color adjustment.
摘要翻译：通过使用存储与色彩转换处理时所参照的色彩转换LUT数据的格子点地址相当的第一格子点色坐标数据的存储器，构成颜色调整参数的颜色调整参数组合部分根据输入颜色调整的指示信息，以及颜色调整部，其通过使用该颜色调整参数对存储在存储器中的第一格子点色坐标进行颜色调整来输出第二格子点坐标数据，并且在转换对第二色彩空间中表示的第二格子点颜色坐标数据进行第二格点色坐标数据，根据通过其更新的颜色转换LUT数据对在第一/彩色空间中表示的输入图像数据进行转换处理。该彩色图像处理装置至少具有输出在第二颜色空间中表示的输出图像数据的颜色转换部。通过这样做，不需要用于颜色调整处理的颜色转换处理。因此，可以提供一种能够以快速颜色调整进行颜色转换处理的图像处理装置。

9. 发明授权

US06721062B1 Color image processing apparatus using pulse width modulation 有权
标题翻译：使用脉宽调制的彩色图像处理装置
公开(公告)号：US06721062B1
公开(公告)日：2004-04-13
申请号：US09468927
申请日：1999-12-22
申请人： Takayuki Sawada , Shinsaku Ito
发明人： Takayuki Sawada , Shinsaku Ito
IPC分类号： G06K1500
CPC分类号： H04N1/6033 , G06K15/128 , G06K15/129
摘要： A color image processing apparatus using a gradation image recording method by pulse width modulation comprises a pulse width selection table determining section for determining a pulse width selection table for pulse width modulation, a gradation correction table determining section for determining a gradation correction table based on the determined pulse width selection table, a color conversion table determining section for determining a color conversion table based on the determined gradation correction table, and a color image processing section for correcting a given color image signal and outputting the corrected color image signal based on the determined color conversion table, the gradation correction table and the pulse width selection table. Consequently, a color image processing can be carried out more properly by determining each table and performing an image processing operation in order of a degree of freedom.
摘要翻译：使用通过脉冲宽度调制的灰度图像记录方法的彩色图像处理装置包括：脉冲宽度选择表确定部分，用于确定用于脉冲宽度调制的脉冲宽度选择表;灰度校正表确定部分，用于基于确定的脉冲宽度选择表，用于基于所确定的灰度校正表来确定颜色转换表的颜色转换表确定部分和用于校正给定彩色图像信号并基于所确定的颜色转换表格输出校正的彩色图像信号的彩色图像处理部分颜色转换表，灰度校正表和脉冲宽度选择表。因此，通过确定每个表并以自由度的顺序执行图像处理操作，可以更正确地执行彩色图像处理。

10. 发明授权

US06657746B1 Look-up table constructing method and color conversion apparatus 失效
标题翻译：查找表构造方法和颜色转换装置
公开(公告)号：US06657746B1
公开(公告)日：2003-12-02
申请号：US09469225
申请日：1999-12-22
申请人： Takahiro Fuchigami , Takayuki Sawada
发明人： Takahiro Fuchigami , Takayuki Sawada
IPC分类号： G06K1500
CPC分类号： G06K15/02 , H04N1/6019
摘要： Not only one color conversion matrix is used for color conversion from a first color space to a second color space, but an appropriate color conversion parameter is calculated for each of a plurality of areas, into which the first color space is divided in advance. Further, an overlapping area is set between each set of adjacent ones of the divided areas of the first color space to construct a look-up table of a smaller conversion error.
摘要翻译：不仅一个颜色转换矩阵用于从第一颜色空间到第二颜色空间的颜色转换，而是针对预先划分第一颜色空间的多个区域中的每个区域计算适当的颜色转换参数。此外，在第一颜色空间的相邻分割区域的每组之间设置重叠区域，以构建更小的转换误差的查找表。

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