Method and apparatus for determining error diffusion coefficients
    1.
    发明申请
    Method and apparatus for determining error diffusion coefficients 有权
    用于确定误差扩散系数的方法和装置

    公开(公告)号:US20050007635A1

    公开(公告)日:2005-01-13

    申请号:US10873506

    申请日:2004-06-23

    IPC分类号: H04N1/409 H04N1/40 H04N1/405

    CPC分类号: H04N1/4052

    摘要: Provided are a method and apparatus for determining error diffusion coefficients. The method includes: (a) setting N groups of error diffusion coefficients (N is a positive integer), in which each group includes a plurality of coefficients; (b) binarizing an image having one gray level value using each of the N groups of error diffusion coefficients; (c) detecting N fit values with respect to N binary-coded images using an evaluation function; (d) determining whether the fit values are detected a predetermined number of times; (e) when a detection number of the fit values does not coincide with the predetermined number of times, reproducing the N groups of error diffusion coefficients according to reproduction rates determined by the N fit values; (f) selecting optional error diffusion coefficients in the reproduced N groups of error diffusion coefficients, and substituting portions of data of selected error diffusion coefficients with each other; and (g) determining the N groups of error diffusion coefficients including the error diffusion coefficients containing substituted data as new error diffusion coefficients, and returning to step (b).

    摘要翻译: 提供了一种用于确定误差扩散系数的方法和装置。 该方法包括:(a)设置N组误差扩散系数(N为正整数),其中每组包括多个系数; (b)使用N组误差扩散系数中的每一个二值化具有一个灰度值的图像; (c)使用评估函数检测关于N个二进制编码图像的N个拟合值; (d)确定拟合值是否被检测到预定次数; (e)当拟合值的检测次数与预定次数不一致时,根据由N拟合值确定的再现速率再现N组误差扩散系数; (f)在再现的N组误差扩散系数中选择可选的误差扩散系数,并将所选择的误差扩散系数的数据部分相互替代; (g)确定N组误差扩散系数,包括包含取代数据的误差扩散系数作为新的误差扩散系数,并返回步骤(b)。

    Color error diffusion method and apparatus therefor
    2.
    发明申请
    Color error diffusion method and apparatus therefor 审中-公开
    颜色误差扩散方法及其设备

    公开(公告)号:US20050134880A1

    公开(公告)日:2005-06-23

    申请号:US10996059

    申请日:2004-11-24

    CPC分类号: H04N1/52

    摘要: An apparatus and method of diffusing a color error which includes modulating a threshold value using a binary error of different color channels, to prevent overlapping of dots of a channel, when a sum of input values of the different color channels is not more than a predetermined value, determining a channel whose color is to be output by comparing a corrected input value of each channel in which an error is diffused and binarizing a color channel by comparing the modulation threshold value with the corrected input value of the determined channel.

    摘要翻译: 一种扩散颜色误差的装置和方法,包括:当不同颜色通道的输入值之和不大于预定值时,包括使用不同颜色通道的二进制误差来调制阈值,以防止信道点重叠 通过将调制阈值与所确定的频道的校正输入值进行比较来确定通过比较其中扩散了误差的每个通道的校正输入值并对颜色通道进行二值化来确定其颜色将被输出的通道。

    Method and apparatus for determining error diffusion coefficients
    3.
    发明授权
    Method and apparatus for determining error diffusion coefficients 有权
    用于确定误差扩散系数的方法和装置

    公开(公告)号:US07443542B2

    公开(公告)日:2008-10-28

    申请号:US10873506

    申请日:2004-06-23

    IPC分类号: G06K15/00 H04N1/40 H04N1/405

    CPC分类号: H04N1/4052

    摘要: Provided are a method and apparatus for determining error diffusion coefficients. The method includes: (a) setting N groups of error diffusion coefficients (N is a positive integer), in which each group includes a plurality of coefficients; (b) binarizing an image having one gray level value using each of the N groups of error diffusion coefficients; (c) detecting N fit values with respect to N binary-coded images using an evaluation function; (d) determining whether the fit values are detected a predetermined number of times; (e) when a detection number of the fit values does not coincide with the predetermined number of times, reproducing the N groups of error diffusion coefficients according to reproduction rates determined by the N fit values; (f) selecting optional error diffusion coefficients in the reproduced N groups of error diffusion coefficients, and substituting portions of data of selected error diffusion coefficients with each other; and (g) determining the N groups of error diffusion coefficients including the error diffusion coefficients containing substituted data as new error diffusion coefficients, and returning to step (b).

    摘要翻译: 提供了一种用于确定误差扩散系数的方法和装置。 该方法包括:(a)设置N组误差扩散系数(N为正整数),其中每组包括多个系数; (b)使用N组误差扩散系数中的每一个二值化具有一个灰度值的图像; (c)使用评估函数检测关于N个二进制编码图像的N个拟合值; (d)确定拟合值是否被检测到预定次数; (e)当拟合值的检测次数与预定次数不一致时,根据由N拟合值确定的再现速率再现N组误差扩散系数; (f)在再现的N组误差扩散系数中选择可选的误差扩散系数,并将所选择的误差扩散系数的数据部分相互替代; (g)确定N组误差扩散系数,包括包含取代数据的误差扩散系数作为新的误差扩散系数,并返回步骤(b)。

    Method and apparatus for detecting a pixel distance to adjust a threshold value
    4.
    发明申请
    Method and apparatus for detecting a pixel distance to adjust a threshold value 审中-公开
    用于检测像素距离以调整阈值的方法和装置

    公开(公告)号:US20050062783A1

    公开(公告)日:2005-03-24

    申请号:US10885897

    申请日:2004-07-08

    CPC分类号: G06K15/02

    摘要: A method of and apparatus for detecting a pixel distance to adjust a threshold value are disclosed. The method and apparatus include determining a first coordinate of a first pixel with reference to a minor pixel for each pixel of an image, and detecting a first pixel distance which corresponds to a distance between the first pixel and the minor pixel by using the determined first coordinate, wherein the first pixel is binarized by adjusting a threshold value based on the detected first pixel distance, and the first coordinate is reset when the binarized first pixel is determined to be the minor pixel.

    摘要翻译: 公开了一种用于检测像素距离以调整阈值的方法和装置。 该方法和装置包括:参考图像的每个像素的次要像素来确定第一像素的第一坐标,以及通过使用确定的第一像素来检测对应于第一像素和次像素之间的距离的第一像素距离 坐标,其中通过基于检测到的第一像素距离调整阈值来将第一像素二值化,并且当二进制化的第一像素被确定为次要像素时,第一坐标被复位。

    Error diffusion method and apparatus using area ratio in CMYKRGBW cube
    5.
    发明申请
    Error diffusion method and apparatus using area ratio in CMYKRGBW cube 审中-公开
    在CMYKRGBW立方体中使用面积比的误差扩散方法和装置

    公开(公告)号:US20050129309A1

    公开(公告)日:2005-06-16

    申请号:US11000503

    申请日:2004-12-01

    CPC分类号: H04N1/52

    摘要: An error diffusion method and apparatus using an area ratio of candidate colors in a CMYKRGBW cube, wherein the candidate colors are determined in response to an input value, and the CMYKRGBW cube is converted into a color space consisting of only four colors so that the candidate colors can be evenly distributed. The color space is then expressed using the area ratio of the candidate colors. Accordingly, it is possible to evenly distribute candidate colors in all gray-scale regions, including a highlight region, thereby obtaining a soft image that does not have a pattern that is strenuous on the eye of an observer.

    摘要翻译: 一种使用CMYKRGBW立方体中的候选颜色的面积比的误差扩散方法和装置,其中响应于输入值确定候选颜色,并且将CMYKRGBW立方体转换成仅由四种颜色组成的颜色空间,使得候选 颜色可均匀分布。 然后使用候选颜色的面积比表示颜色空间。 因此,可以在包括高亮区域的所有灰度区域中均匀分布候选颜色,从而获得在观察者的眼睛上不具有剧烈花纹的软图像。

    Apparatus and method for compensating for defective pixel
    6.
    发明申请
    Apparatus and method for compensating for defective pixel 审中-公开
    用于补偿缺陷像素的装置和方法

    公开(公告)号:US20060291745A1

    公开(公告)日:2006-12-28

    申请号:US11385872

    申请日:2006-03-22

    IPC分类号: G06K9/40 H04N1/405

    摘要: An apparatus and a method for compensating for a defective pixel are provided. The apparatus includes a defective pixel information detecting unit and a halftoning unit. The defective pixel information detecting unit detects whether input continuous gray scale data forms a defective pixel caused by a defective image-forming element and outputs the detected result as defective pixel information. The halftoning unit reflects the defective pixel information in halftoning of the continuous gray scale data using error diffusion. In an image-forming apparatus (such as a printer, an LED etc) reproducing continuous gray scales using a plurality of image-forming elements each forming a limited gray scale, image quality deterioration caused by the defective pixel can be compensated for by performing halftoning in consideration of the defective image-forming element when some of the image-forming elements are defective.

    摘要翻译: 提供了用于补偿缺陷像素的装置和方法。 该装置包括缺陷像素信息检测单元和半色调单元。 缺陷像素信息检测单元检测输入的连续灰度数据是否形成由缺陷图像形成元件引起的缺陷像素,并将检测结果作为缺陷像素信息输出。 半色调单元使用误差扩散来反映连续灰度数据的半色调中的缺陷像素信息。 在使用多个形成有限灰度的图像形成元件再现连续灰度的图像形成装置(例如打印机,LED等)中,可以通过执行半色调来补偿由缺陷像素引起的图像质量劣化 考虑到当一些图像形成元件有缺陷时缺陷图像形成元件。

    Apparatus and method of forming images
    7.
    发明授权
    Apparatus and method of forming images 失效
    图像形成装置及方法

    公开(公告)号:US08405878B2

    公开(公告)日:2013-03-26

    申请号:US12546906

    申请日:2009-08-25

    申请人: Ki-min Kang

    发明人: Ki-min Kang

    IPC分类号: H04N1/405

    CPC分类号: H04N1/40087 H04N1/4055

    摘要: An image forming apparatus which provides a plurality of developers that have different densities for each color, and an image forming method thereof. The image forming method may include detecting a remaining amount of a first developer; and forming an image by expressing a gray scale of inputted data according to a multi-bit halftoning process using a second developer that is similar to the first developer in color and higher than the first developer in density if the remaining amount of the first developer is a preset value or less.

    摘要翻译: 提供对于每种颜色具有不同密度的多个显影剂的图像形成装置及其图像形成方法。 图像形成方法可以包括检测第一显影剂的剩余量; 并且如果第一显影剂的剩余量是第一显影剂的剩余量,则使用与第一显影剂颜色相似的第二显影剂和高于第一显影剂的浓度的第二显影剂,根据多位半色调处理,通过表达输入数据的灰度来形成图像 预设值或更小。

    Error diffusion apparatus with cluster dot
    8.
    发明申请
    Error diffusion apparatus with cluster dot 审中-公开
    具有簇点误差扩散装置

    公开(公告)号:US20060077467A1

    公开(公告)日:2006-04-13

    申请号:US11238065

    申请日:2005-09-29

    申请人: Ki-min Kang

    发明人: Ki-min Kang

    IPC分类号: G06F15/00

    CPC分类号: H04N1/4053

    摘要: Disclosed is an error diffusion apparatus with cluster dot. The error diffusion apparatus for performing an error diffusion on a second pixel based on a first pixel includes: a binary processing unit for binarizing a tone value of the first pixel based on a predetermined threshold; a binary error diffusion unit for computing a binary error value based on a difference between the tone value of the first pixel and a binary tone value for the first pixel, and reflecting the binary error value on a tone value of the second pixel applied to the binary processing unit; and a cluster forming unit for deciding whether to form a cluster for the first and second pixels, in reference to a predetermined cluster pattern and a binary tone value of the first pixel. The error diffusing apparatus reduces switching noises generated from the image forming process in pixel unit, and expands the tone value range of an image. In addition, the error diffusing apparatus prevents deteriorations in image quality by limiting the cluster size and restricting the cluster formation in the shadow and highlight areas of an image.

    摘要翻译: 公开了具有簇点的误差扩散装置。 用于基于第一像素在第二像素上执行误差扩散的误差扩散装置包括:二进制处理单元,用于基于预定阈值二值化第一像素的色调值; 二进制误差扩散单元,用于基于第一像素的色调值和第一像素的二进制色调值之间的差计算二进制误差值,并且反映二值误差值对应用于第二像素的第二像素的色调值 二进制处理单元; 以及簇形成单元,用于参照预定的聚类图案和第一像素的二进制色调值来决定是否形成第一和第二像素的簇。 误差扩散装置减少以像素为单位从图像形成处理产生的开关噪声,并且扩大图像的色调值范围。 此外,误差扩散装置通过限制簇大小和限制在阴影中的簇形成并突出显示图像的区域来防止图像质量的恶化。

    Image forming apparatus and method
    9.
    发明授权
    Image forming apparatus and method 有权
    图像形成装置及方法

    公开(公告)号:US08554000B2

    公开(公告)日:2013-10-08

    申请号:US12013608

    申请日:2008-01-14

    IPC分类号: G06K9/36

    CPC分类号: H04N1/40062 H04N1/6016

    摘要: An image forming apparatus and an image forming method thereof are provided. An image forming apparatus according to an exemplary embodiment of the present general inventive concept comprises a decoder to decode a compressed image to convert the compressed image into image data, a pure black determining unit to determine whether the image data is pure black by using information of the converted image data, a section classifying unit to classify the image data into a text section and an image section by using a result of the pure black determination, and a color coordinate converter to perform color coordinate conversion on the image section of the classified sections. Therefore, it is possible to improve readability of black text.

    摘要翻译: 提供了一种图像形成装置及其图像形成方法。 根据本发明总体构思的示例性实施例的图像形成装置包括:解码器,用于解码压缩图像以将压缩图像转换成图像数据;纯黑色确定单元,用于通过使用图像数据的信息来确定图像数据是否为纯黑色 转换的图像数据,通过使用纯黑色确定的结果将图像数据分类为文本部分和图像部分的部分分类单元和对分类部分的图像部分执行颜色坐标转换的颜色坐标转换器 。 因此,可以提高黑色文本的可读性。

    IMAGE FORMING APPARATUS AND METHOD
    10.
    发明申请
    IMAGE FORMING APPARATUS AND METHOD 有权
    图像形成装置和方法

    公开(公告)号:US20080317360A1

    公开(公告)日:2008-12-25

    申请号:US12013608

    申请日:2008-01-14

    IPC分类号: G06K9/36

    CPC分类号: H04N1/40062 H04N1/6016

    摘要: An image forming apparatus and an image forming method thereof are provided. An image forming apparatus according to an exemplary embodiment of the present general inventive concept comprises a decoder to decode a compressed image to convert the compressed image into image data, a pure black determining unit to determine whether the image data is pure black by using information of the converted image data, a section classifying unit to classify the image data into a text section and an image section by using a result of the pure black determination, and a color coordinate converter to perform color coordinate conversion on the image section of the classified sections. Therefore, it is possible to improve readability of black text.

    摘要翻译: 提供了一种图像形成装置及其图像形成方法。 根据本发明总体构思的示例性实施例的图像形成装置包括:解码器,用于解码压缩图像以将压缩图像转换成图像数据;纯黑色确定单元,用于通过使用图像数据的信息来确定图像数据是否为纯黑色 转换的图像数据,通过使用纯黑色确定的结果将图像数据分类为文本部分和图像部分的部分分类单元和对分类部分的图像部分执行颜色坐标转换的颜色坐标转换器 。 因此,可以提高黑色文本的可读性。