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公开(公告)号：EP0812102A3
公开(公告)日：2000-05-31
申请号：EP97108442.1
申请日：1997-05-26
CPC分类号： H04N1/52 , H04N1/4051
摘要： A method for halftoning a multi-channel digital color image having an x,y array of color pixel values, includes the steps of: providing a matrix of dither values for each color channel of the digital color image wherein two or more of the matrices of dither values are designed jointly to minimize a visual cost function; for each color channel modularly addressing the matrix of dither values with the location of a pixel in the digital color image to obtain an addressed dither value; comparing the addressed dither value for each color channel with the pixel value for the corresponding color channel to determine an output halftone image value for each color channel; and repeating steps b and c for each pixel in the digital image.
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2.发明授权Method for representing a digital color image using a set of palette colors 有权一种用于显示使用的颜色的调色板的彩色图像的方法
公开(公告)号：EP1274227B1
公开(公告)日：2011-12-21
申请号：EP02077487.3
申请日：2002-06-24
发明人： Spaulding, Kevin Edward , Yu, Qing , Luo, Jiebo
IPC分类号： H04N1/64
CPC分类号： H04N1/644
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3.发明公开Method for halftoning a multi-channel digital color image having at least one group of similar color channels 审中-公开一种用于具有至少一个基团类似的颜色通道的半色调的多通道数字彩色图像的方法
公开(公告)号：EP1271927A3
公开(公告)日：2004-03-31
申请号：EP02077261.2
申请日：2002-06-10
CPC分类号： H04N1/40087 , H04N1/52
摘要： A method for halftoning a multi-channel digital color image having an x,y array of color pixel values, wherein at least two color channels are similar having substantially the same color but with low- and high-densities, includes the steps of: providing a matrix of dither values for each group of similar color channels wherein two or more of the matrices of dither values are designed jointly to minimize a visual cost function; for at least one group of similar color channels, forming an inverted matrix of dither values by subtracting the value of each element of the matrix of dither values for that group from a predetermined maximum value, associating the inverted matrix of dither values with one of the low- or high-density color channels, and associating the matrix of dither values for that group with the other low- or high-density color channel of that group; for each color channel of the multi-channel digital color image modularly addressing the matrix of dither values associated with that color channel using the location of a pixel in the digital color image to obtain ad addressed dither value; using the addressed dither value for each color channel, together with the pixel value for the corresponding color channel, to determine an output halftone image value for each color channel.
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公开(公告)号：EP0812102B1
公开(公告)日：2002-07-24
申请号：EP97108442.1
申请日：1997-05-26
CPC分类号： H04N1/52 , H04N1/4051
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5.发明公开Method for representing a digital color image using a set of palette colors 有权一种用于显示使用的颜色的调色板的彩色图像的方法
公开(公告)号：EP1274227A2
公开(公告)日：2003-01-08
申请号：EP02077487.3
申请日：2002-06-24
发明人： Spaulding, Kevin Edward , Yu, Qing , Luo, Jiebo
IPC分类号： H04N1/64
CPC分类号： H04N1/644
摘要： Disclosed is a method for converting an input digital color image having a set of possible input colors to an output digital color image having a set of palette colors, the number of palette colors being less than the number of possible input colors, wherein the set of palette colors is determined based on the distribution of colors in the input digital image supplemented by a distribution of important colors.
摘要翻译： 公开了一种用于转换为输入数字彩色图像具有一组可能的输入颜色向具有一组调色板颜色的调色板中的颜色小于可能的输入的颜色数的数量的输出数字彩色图像，worin该组中的方法 调色板颜色是确定性的开采基于色彩由色彩重要分布补充的输入数字图像中的分布。
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6.发明公开Method for halftoning a multi-channel digital color image 失效Verfahren zur Halbtonrasterung von einem mehrkanaligen digitalen Farbbild
公开(公告)号：EP0812102A2
公开(公告)日：1997-12-10
申请号：EP97108442.1
申请日：1997-05-26
IPC分类号： H04N1/40
CPC分类号： H04N1/52 , H04N1/4051
摘要： A method for halftoning a multi-channel digital color image having an x,y array of color pixel values, includes the steps of: providing a matrix of dither values for each color channel of the digital color image wherein two or more of the matrices of dither values are designed jointly to minimize a visual cost function; for each color channel modularly addressing the matrix of dither values with the location of a pixel in the digital color image to obtain an addressed dither value; comparing the addressed dither value for each color channel with the pixel value for the corresponding color channel to determine an output halftone image value for each color channel; and repeating steps b and c for each pixel in the digital image.
摘要翻译： 一种用于半色调具有x，y彩色像素值阵列的多通道数字彩色图像的方法包括以下步骤：为数字彩色图像的每个颜色通道提供抖动值矩阵，其中两个或更多个矩阵 联合设计抖动值以最小化视觉成本函数; 对于每个颜色通道，以数字彩色图像中的像素的位置模块化地寻址抖动值的矩阵以获得寻址的抖动值; 将每个颜色通道的寻址抖动值与相应颜色通道的像素值进行比较，以确定每个颜色通道的输出半色调图像值; 并对数字图像中的每个像素重复步骤b和c。
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7.发明公开Method for representing a digital color image using a set of palette colors 有权一种用于显示使用的颜色的调色板的彩色图像的方法
公开(公告)号：EP1274227A3
公开(公告)日：2007-08-15
申请号：EP02077487.3
申请日：2002-06-24
发明人： Spaulding, Kevin Edward , Yu, Qing , Luo, Jiebo
IPC分类号： H04N1/64
CPC分类号： H04N1/644
摘要： Disclosed is a method for converting an input digital color image having a set of possible input colors to an output digital color image having a set of palette colors, the number of palette colors being less than the number of possible input colors, wherein the set of palette colors is determined based on the distribution of colors in the input digital image supplemented by a distribution of important colors.
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8.发明公开Method for halftoning a multi-channel digital color image having at least one group of similar color channels 审中-公开一种用于具有至少一个基团类似的颜色通道的半色调的多通道数字彩色图像的方法
公开(公告)号：EP1271927A2
公开(公告)日：2003-01-02
申请号：EP02077261.2
申请日：2002-06-10
IPC分类号： H04N1/52
CPC分类号： H04N1/40087 , H04N1/52
摘要： A method for halftoning a multi-channel digital color image having an x,y array of color pixel values, wherein at least two color channels are similar having substantially the same color but with low- and high-densities, includes the steps of: providing a matrix of dither values for each group of similar color channels wherein two or more of the matrices of dither values are designed jointly to minimize a visual cost function; for at least one group of similar color channels, forming an inverted matrix of dither values by subtracting the value of each element of the matrix of dither values for that group from a predetermined maximum value, associating the inverted matrix of dither values with one of the low- or high-density color channels, and associating the matrix of dither values for that group with the other low- or high-density color channel of that group; for each color channel of the multi-channel digital color image modularly addressing the matrix of dither values associated with that color channel using the location of a pixel in the digital color image to obtain ad addressed dither value; using the addressed dither value for each color channel, together with the pixel value for the corresponding color channel, to determine an output halftone image value for each color channel.
摘要翻译： 一种用于半色调具有x的多通道的数字彩色图像的方法，彩色像素值Y的阵列，worin至少两个颜色通道是相似的具有基本相同的颜色，但与低和高密度，包括以下步骤：提供 抖动值的每组相似彩色通道worin抖动值的两个或更多个的矩阵被联合设计成最小化视觉成本函数的矩阵; 对于至少一个基团类似的颜色信道，通过从预定的最大值减去该组抖动值的矩阵的每个元素的值，抖动值的逆矩阵与的一个相关联形成的抖动值的逆矩阵的 低或高密度的颜色通道，和抖动值的矩阵该组与组的其他低或高密度色彩通道相关联所做; 对于多通道数字彩色图像模块化解决与使用像素的位置处的数字彩色图像中，以获得广告解决的抖动值在信道相关联的颜色值的抖动矩阵的每个颜色通道; 使用用于每个颜色通道的寻址抖动值，与相应的颜色通道的像素值一起，以确定性的矿井，以输出半色调图像值针对每个颜色信道。
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