公开(公告)号：US20020060812A1

公开(公告)日：2002-05-23

申请号：US09985617

申请日：2001-11-05

发明人： Hiroyuki Morimatsu

IPC分类号： G06K015/02 ,  H04N001/405 ,  H04N001/409 ,  H04N001/52 ,  H04N001/58

CPC分类号： H04N1/4057 ,  G06K15/02 ,  G06K2215/0074

摘要： An image processing method and apparatus for improving both gradation and resolution in a screening process. The apparatus comprises an image memory for storing multi-valued image data in pixel units; a pixel data acquiring portion for acquiring image pixel data from the memory; a threshold value matrix constituted by a density area by which dots of a high number of lines are produced and another density area by which dots of a low number of lines are produced; a threshold value data acquiring portion for acquiring from the matrix threshold value data corresponding to image data acquired by the pixel data acquiring portion based upon the image data address; and a comparator for comparing the acquired image data with the acquired threshold value data to thereby output a consequent binary signal.

摘要翻译： 一种用于在筛选过程中改善灰度和分辨率的图像处理方法和装置。 该装置包括用于以像素为单位存储多值图像数据的图像存储器; 像素数据获取部分，用于从存储器获取图像像素数据; 由产生大量线的点的密度区域和产生低线数的点的另一个密度区域构成的阈值矩阵; 阈值数据获取部分，用于根据所述图像数据地址从与所述像素数据获取部分获取的图像数据相对应的矩阵阈值数据中获取; 以及比较器，用于将所获取的图像数据与获取的阈值数据进行比较，从而输出随后的二进制信号。

公开(公告)号：US20020057442A1

公开(公告)日：2002-05-16

申请号：US09085459

申请日：1998-05-28

发明人： MITSURU SAWANO ,  OSAMU SHIMIZU

IPC分类号： G06K015/02 ,  H04N001/405 ,  H04N001/409

CPC分类号： H04N1/52 ,  G06K15/107 ,  G06K2215/0094

摘要： An image printing method, wherein one pixel is formed from a plurality of dots arranged in a primary scanning direction, in which printing elements are arranged, and in a secondary scanning direction perpendicular to the primary scanning direction; wherein the tone of one pixel is expressed by changing the overall printing area in accordance with whether or not the dots are printed; and wherein a multicolor image is printed by combination of one yellow pixel, one magenta pixel, one cyan pixel, and one black pixel, the method comprising the step of: setting to a nonintegral multiple a dimensional ratio among one yellow pixel, one magenta pixel, one cyan pixel, and one black pixel in the secondary scanning direction.

摘要翻译： 一种图像打印方法，其中一个像素由沿主扫描方向布置的多个点形成，其中布置有打印元件，并且在垂直于主扫描方向的副扫描方向上形成一个像素; 其中通过根据是否打印点来改变整个打印区域来表示一个像素的色调; 并且其中通过一个黄色像素，一个品红色像素，一个青色像素和一个黑色像素的组合来打印多色图像，所述方法包括以下步骤：将一个黄色像素，一个品红色像素之间的非整数倍尺寸比设置 ，一个青色像素和一个黑色像素在副扫描方向上。

公开(公告)号：US20020051210A1

公开(公告)日：2002-05-02

申请号：US10025812

申请日：2001-12-26

发明人： Victor Ostromoukhov

IPC分类号： H04N001/405

CPC分类号： H04N1/4053

摘要： Halftoning by error diffusion, enhanced so as to reduce the presence of structural artifacts in the halftoned output while avoiding an artificial increase in halftoning image noise. Specifically, error diffusion according to the invention divides the input gray level intensity range into different segments for purposes of both thresholding and error diffusion. Different error diffusion threshold masks are applied for each respective segment, and different error diffusion weights are applied for each respective segment, with a decision being made as to whether or not to apply a different threshold mask being based on the local image gradient.

公开(公告)号：US20020039190A1

公开(公告)日：2002-04-04

申请号：US09962137

申请日：2001-09-26

申请人： SEIKO EPSON CORPORATION

发明人： Toru Fujita ,  Hiroshi Nakazato ,  Hisako Mizutani

IPC分类号： H04N001/405 ,  G06K015/02

CPC分类号： H04N1/4055 ,  H04N1/4056

摘要： An image forming apparatus having first and second basic cells each containing a predetermined number of cells in a main scanning direction and a sub-scanning direction and disposed adjacent to each other in the sub-scanning direction, a gradation processing portion arranged to perform a gradation expressing process for each basic cell in accordance with a density of a supplied image and a dot forming portion capable of forming dots on a recording medium to correspond to each pixel subjected to the gradation expressing process by the gradation processing portion. The gradation processing portion performs the gradation expressing process in such a manner that enlargement of dots in the first and second basic cells adjacent to each other in the sub-scanning direction is inhibited in the sub-scanning direction until the dots are enlarged and connected to each other in the main scanning direction. Thus, the distance in the sub-scanning direction between dots in the first and second basic cells in a low density region is kept to a predetermined width.

摘要翻译： 一种图像形成装置，具有第一和第二基本单元，每个基本单元在主扫描方向和副扫描方向上均包含预定数量的单元，并且在副扫描方向上彼此相邻地布置;灰度处理部， 根据所提供的图像的浓度和能够在记录介质上形成点的点形成部分对应于通过灰度处理部分进行灰度表达处理的每个像素的每个基本单元的表达处理。 灰度处理部分执行灰度表示处理，使得在副扫描方向上彼此相邻的第一和第二基本单元中的点的扩大在副扫描方向上被禁止，直到点被放大并连接到 彼此在主扫描方向。 因此，将低密度区域中的第一和第二基本单元中的点之间的副扫描方向上的距离保持为预定宽度。

公开(公告)号：US20020030832A1

公开(公告)日：2002-03-14

申请号：US09911715

申请日：2001-07-25

发明人： Takeshi Shibuya ,  Yukio Yamamoto ,  Naoyuki Urata ,  Toshiyuki Yamada ,  Natsuhiko Hirayama

IPC分类号： B41J001/00 ,  G06K001/00 ,  B41B001/00 ,  G06F015/00 ,  G06K015/02 ,  H04N001/405 ,  H04N001/407 ,  H04N001/52 ,  H04N001/60

CPC分类号： H04N1/6033

摘要： In an image output device a test chart 18 including tests charts 6 of each color is used, and a tone correction table is calculated. The test charts 6 are patterned in a checkered pattern, each including continuous areas 10 in which the tones increase in steps and reference areas 11 for comparison with the continuous areas 10. The reference areas 11 are formed of white ground of paper in a highlight proof part 7, a solid pattern with a maximum density in a shadow proof part 8, and halftone dot-concentrated or line screens with a lower resolution than in the continuous areas in a middle proof part 9. Tone correction values are calculated from characteristic values of the highlight, shadow and middle parts, obtained from visual data of the test chart 18.

摘要翻译： 在图像输出装置中，使用包括各种颜色的测试图6的测试图18，并计算色调校正表。 测试图6以方格图案被图案化，每个图案包括连续区域10，其中色调逐渐增加，并且参考区域11与连续区域10进行比较。参考区域11由白色的白色地面形成，具有高亮度证明 第7部分，阴影部分8中具有最大密度的实心图案，以及具有比在中间证明部分9中的连续区域中更低的分辨率的半色调点集中或线条画面。色调校正值是根据 亮点，阴影和中间部分，从测试图18的视觉数据获得。

公开(公告)号：US20020003633A1

公开(公告)日：2002-01-10

申请号：US09878943

申请日：2001-06-13

发明人： Atsushi Matsumoto ,  Shinichi Kato

IPC分类号： G06K015/02 ,  H04N001/56 ,  H04N001/60 ,  H04N001/52 ,  H04N001/403 ,  H04N001/405

CPC分类号： H04N1/405 ,  H04N1/40 ,  H04N1/40062

摘要： One particular object of the present invention is to facilitate high quality reproduction for an image combining an image based on rendered PDL commands and a scanned image without considering whether the processed pixel is a portion of the scanned image or a portion of the image base on rendered PDL commands. So the present invention relates to an image processing apparatus which include an inputting unit for inputting image data described by a command corresponding to each part of an image, an interpreting unit for interpreting the command to form a bitmap image and to output attribute information; a scanning unit for scanning an image to output color image data; a generating unit for generating flag data indicating attributions of the image based on the color image data and indicating the pixel preferring the same image process as the pixel based on the attribute information; a first combining unit for combining the color image data and the bitmap image; and a second combining unit for combining the flag data and the attribute information of the command.

摘要翻译： 本发明的一个具体目的是为了便于基于渲染的PDL命令和扫描图像组合图像的图像而不考虑被处理的像素是否是被扫描的图像的一部分或者基于渲染的图像的一部分的高质量再现 PDL命令。 因此，本发明涉及一种图像处理装置，其包括：输入单元，用于输入由与图像的每个部分相对应的命令描述的图像数据;解释单元，用于解释命令以形成位图图像并输出属性信息; 用于扫描图像以输出彩色图像数据的扫描单元; 生成单元，用于基于所述彩色图像数据生成表示所述图像的属性的标志数据，并且基于所述属性信息指示优选与所述像素相同的图像处理的像素; 用于组合彩色图像数据和位图图像的第一组合单元; 以及用于组合标志数据和命令的属性信息的第二组合单元。

公开(公告)号：US20040190070A1

公开(公告)日：2004-09-30

申请号：US10812964

申请日：2004-03-31

发明人： Eiichi Sasaki

IPC分类号： H04N001/405 ,  H04N001/407

CPC分类号： H04N1/40087 ,  H04N1/4055 ,  H04N1/407

摘要： A novel image forming apparatus which makes gray-scale by performing at least one of operations including a manipulation of a plurality of dots arranged in a form of matrix, a single-dot-based density adjustment, or a single-dot-based size adjustment, includes a dot status detector and a density adjuster. The dot status detector detects an occurrence in which a dot exists at a focus dot position and no dot exists at positions immediately adjacent to the focus dot position in the main scanning direction. The density adjuster adjusts a writing level of the dot at the focus dot position so as to make the gray-scale smooth when the dot status detector detects the occurrence.

摘要翻译： 一种新颖的图像形成装置，其通过执行包括以矩阵形式排列的多个点的操作，单点密度调整或基于单点的尺寸调整中的至少一个来进行灰度级 包括点状态检测器和密度调节器。 点状态检测器检测在聚焦点位置处存在点的存在，并且在主扫描方向上与焦点位置紧邻的位置处不存在点。 浓度调节器调整聚焦点位置处的点的写入电平，以便当点状态检测器检测到发生时使灰度平滑。

公开(公告)号：US20040179240A1

公开(公告)日：2004-09-16

申请号：US10740833

申请日：2003-12-22

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Eul-hwan Lee

IPC分类号： H04N001/405

CPC分类号： H04N1/4053

摘要： A binary image generating method and apparatus using location information of minority pixels. A modified input pixel value u(m, n) is calculated by adding a value obtained by filtering an error value e(m, n) of a previous binary pixel to a currently input continuous tone pixel value i(m, n). An ideally optimum distance dopt(i(m, n)) between the currently input continuous tone pixel value i(m, n) and a minority pixel is calculated. A minimum distance dm between the input pixel and minority pixels is calculated using location information of the minority pixels at minimum distances from binary pixels adjacent to the input pixel. A threshold value t(m, n) is calculated using the ideally optimum distance dopt(i(m, n)) and the minimum distances dm for the currently input continuous tone pixel value i(m, n). The threshold value t(m, n) is compared with the modified input pixel value u(m, n) to determine a binary pixel value b(m, n) of the input pixel. The location information of the minority pixels at the minimum distances from the input pixel is then stored.

摘要翻译： 使用少数像素位置信息的二值图像生成方法和装置。 通过将前一二进制像素的误差值e（m，n）滤波获得的值与当前输入的连续色调像素值i（m，n）相加来计算修正的输入像素值u（m，n）。 计算当前输入的连续色调像素值i（m，n）与少数像素之间的理想最佳距离dopt（i（m，n））。 使用与输入像素相邻的二进制像素的最小距离处的少数像素的位置信息来计算输入像素和少数像素之间的最小距离dm。 使用理想最佳距离dopt（i（m，n））和当前输入的连续色调像素值i（m，n）的最小距离dm来计算阈值t（m，n）。 将阈值t（m，n）与修改的输入像素值u（m，n）进行比较，以确定输入像素的二进制像素值b（m，n）。 然后存储距输入像素最小距离处的少数像素的位置信息。

公开(公告)号：US20040165219A1

公开(公告)日：2004-08-26

申请号：US10373972

申请日：2003-02-25

申请人： Palo Alto Research Center, Incorporated

发明人： Jindong Chen

IPC分类号： H04N001/409 ,  G06T005/00 ,  G06K015/00 ,  H04N001/405

CPC分类号： H04N1/405 ,  G06T2201/0065

摘要： A method for reducing the obtrusiveness of artifacts appearing in a glyph shape code image space includes encoding digital data values as a glyph shape code, such that the shape code is composed of glyphs having shapes that encode digital data values. Each distinct data value that is encoded is represented by the shape of a glyph, and these glyphs are spatially distributed in a bitmap image space. The bitmap image space is analyzed to determine the presence of artifacts within the bitmap image space, and a raster image is generated in which at least a single dot is placed within at least one of the artifacts in the image space.

摘要翻译： 用于减少出现在字形形状代码图像空间中的伪影的强调的方法包括将数字数据值编码为字形形状代码，使得形状代码由具有编码数字数据值的形状的字形组成。 编码的每个不同数据值由字形的形状表示，并且这些字形在空间上分布在位图图像空间中。 分析位图图像空间以确定位图图像空间内的伪像的存在，并且生成光栅图像，其中至少一个点被放置在图像空间中的至少一个伪像内。

公开(公告)号：US20040160615A1

公开(公告)日：2004-08-19

申请号：US10368690

申请日：2003-02-18

申请人： Xerox Corporation

发明人： David E. Rumph ,  Charles M. Hains

IPC分类号： G06K015/00 ,  G03F003/08 ,  H04N001/405

CPC分类号： H04N1/608

摘要： A method for color cast removal in a scanned image in L*a*b* space includes generating a first color cast correction curve for mapping L* to a first color correction, nulla*, (or nullb*) wherein the first correction curve provides a desired a* shift in midtone regions and is modulated as a function of L* such that black and white points are unaffected; for each pixel n in the scanned image, passing L*n through the first color cast correction curve for obtaining a value of nulla*n; and adding the value of nulla*n to the scanned image's original a*n component. To ensure that the color corrected a* remains within gamut, a second correction curve for applying a clipping factor to the mapped nulla* may be generated with the a*n passing through the second correction curve for obtaining a clipping factor Cn; and modifying the a*n value by Cn(nulla*n).

摘要翻译： 一种用于在L * a * b *空间中的扫描图像中去色调的方法包括：生成用于将L *映射到第一颜色校正的Deltaa *（或Deltab *）的第一色偏校正曲线，其中第一校正曲线 中间色调区域中所需的*移位，并且被调制为L *的函数，使得黑色和白色点不受影响; 对于扫描图像中的每个像素n，将L * n通过第一色偏校正曲线以获得Deltaa * n的值; 并将Deltaa * n的值添加到扫描图像的原始a * n分量。 为了确保校正的颜色a *保持在色域内，可以用通过第二校正曲线的a * n产生用于将削波因子应用于映射的Deltaa *的第二校正曲线，以获得限幅因子Cn; 并通过Cn（Δa* n）修改a * n值。