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    • 12. 发明授权
    • Method for segmenting a digital image into a foreground region and a key
color region
    • 将数字图像分割成前景区域和键颜色区域的方法
    • US6011595A
    • 2000-01-04
    • US934373
    • 1997-09-19
    • Todd R. HendersonKevin E. SpauldingDouglas W. Couwenhoven
    • Todd R. HendersonKevin E. SpauldingDouglas W. Couwenhoven
    • H04N9/75
    • H04N9/75
    • A method for segmenting a digital image into a foreground region and a key color region including characterizing a distribution of key color values; using the distribution of key color values to produce a multi-dimensional look-up-table having three or more dimensions indexed by color values in a selected color space to define a key color volume; addressing the multi-dimensional look-up table with color values of pixels in the digital image to determine whether the color values of such pixels are within the key color volume; and labeling pixels in the digital image whose color values fall within the key color volume to be within the key color region and labeling all other pixels to be within the foreground region whereby the digital image is segmented into the foreground region and the key color region.
    • 一种用于将数字图像分割成前景区域和键颜色区域的方法,包括表征键颜色值的分布; 使用键颜色值的分布来产生具有由所选颜色空间中的颜色值索引的三维或更多维度的多维查找表,以定义键颜色体积; 用数字图像中的像素的颜色值寻址多维查找表,以确定这些像素的颜色值是否在关键颜色体积内; 并且将其颜色值落在键颜色体积内的数字图像中的像素标记为在关键颜色区域内,并将所有其他像素标记在前景区域内,由此数字图像被分割成前景区域和键颜色区域。
    • 16. 发明授权
    • Reducing ink bleed artifacts for RGB images
    • 减少RGB图像的墨水泄漏伪影
    • US08422082B2
    • 2013-04-16
    • US12507226
    • 2009-07-22
    • Douglas W. CouwenhovenKevin E. SpauldingSteven A. Billow
    • Douglas W. CouwenhovenKevin E. SpauldingSteven A. Billow
    • H04N1/407
    • H04N1/6022
    • A method for modifying an input digital image having three color channels, to form a modified digital image suitable for use by an inkjet printer having reduced ink bleed artifacts comprising computing a transformed digital image containing at least a black color channel and a color dependent scale factor channel, computing a filtered black color channel using a convolution operation, and forming the modified digital image in response to the corresponding pixel values of the color dependent scale factor channel and the filtered black color channel, so that when the modified digital image is used to produce a printed image on an inkjet printer there are reduced ink bleed artifacts.
    • 一种用于修改具有三个颜色通道的输入数字图像的方法,以形成适于由具有减少的墨水泄漏伪影的喷墨打印机使用的修改的数字图像,包括计算至少包含黑色通道和颜色依赖比例因子的变换数字图像 使用卷积运算来计算滤波后的黑色频道,以及响应于色彩依赖比例因子信道和滤波黑色频道的相应像素值形成修改后的数字图像,使得当修改后的数字图像被用于 在喷墨打印机上产生印刷图像有减少的渗墨伪影。