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    • 92. 发明授权
    • Determining the color match between image data and graphics objects
    • 确定图像数据和图形对象之间的颜色匹配
    • US07649649B2
    • 2010-01-19
    • US11282850
    • 2005-11-17
    • Reiner EschbachZhigang FanDavid E. Rumph
    • Reiner EschbachZhigang FanDavid E. Rumph
    • G06F15/00H04N1/405G06T5/00G06K9/00
    • G06T7/90
    • A system/method of color match assessment for electronic documents includes receiving digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering the edge of the raster image object. The pixel color values defining the edge of the raster image object are processed to estimate a local color variance of the pixel color values. The local color variance is used to determine if the edge can be color matched to the bordering color graphics object. If the edge can be color matched, a match color for the edge is derived. The match color is associated with the digital data defining the electronic document so that a downstream object color match system can use the match color as needed, e.g., to adjust the color of the bordering color graphics object to ensure a match with the edge of the raster image object when the electronic document is printed using a xerographic printing process.
    • 用于电子文档的颜色匹配评估的系统/方法包括接收定义包括具有边缘的光栅图像对象和与光栅图像对象边缘接近的彩色图形对象的复合电子文档的数字数据。 处理定义光栅图像对象边缘的像素颜色值,以估计像素颜色值的局部颜色方差。 局部颜色方差用于确定边缘是否可以与边界颜色图形对象进行颜色匹配。 如果边缘可以匹配,则会导出边缘的匹配颜色。 匹配颜色与定义电子文档的数字数据相关联,使得下游对象颜色匹配系统可以根据需要使用匹配颜色,例如,调整边界颜色图形对象的颜色,以确保与边缘的匹配 使用静电印刷过程打印电子文档时的光栅图像对象。
    • 93. 发明申请
    • SHOW-THROUGH REDUCTION METHOD AND SYSTEM
    • 显示减少方法和系统
    • US20090262402A1
    • 2009-10-22
    • US12103978
    • 2008-04-16
    • Zhigang FanReiner EschbachMartin S. MaltzJudith Stinehour
    • Zhigang FanReiner EschbachMartin S. MaltzJudith Stinehour
    • H04N1/04
    • H04N1/4095
    • A show-through reduction method is disclosed. The method is designed to deal with both light and severe show-through. The method focuses mostly on text documents, with characters possibly appearing in multiple gray levels, although the method can also be extended to color documents. As in the prior art, the front and back pages are processed in pairs. However, no perfect page alignment is assumed here, since we are dealing with real images. Instead, a front and back registration is performed as the first step before the pages are further analyzed. In this method, we are aligning the front page content with its show-through appearing in the back side, and the back page content with its show-through appearing in the front side. Once the two sides are aligned, masks are generated for both sides to differentiate severe show-through and light color content regions. Finally, different TRCs are applied to different regions. The show-through is reduced and the page contents are retained.
    • 公开了一种透视简化方法。 该方法旨在处理轻型和重型展示。 该方法主要集中在文本文档上,字符可能出现在多个灰度级,尽管该方法也可以扩展到彩色文档。 如现有技术那样,前页和后页成对处理。 然而,在这里假设没有完美的页面对齐,因为我们正在处理真实的图像。 相反,在进一步分析页面之前,执行正面和背面注册作为第一步。 在这种方法中,我们正在将首页内容与其后面的显示对齐,后端页面的内容与其显示出现在前面。 一旦双方对齐,双方将产生掩模,以区分严重的透明和浅色内容区域。 最后,不同的TRC应用于不同的地区。 展示次数减少,页面内容保留。
    • 94. 发明申请
    • Removing Ringing and Blocking Artifacts from JPEG Compressed Document Images
    • 从JPEG压缩文档图像中删除振铃和阻塞人工制品
    • US20090214113A1
    • 2009-08-27
    • US12463768
    • 2009-05-11
    • Basak OztanZhigang FanReiner EschbachAmal Z. Malik
    • Basak OztanZhigang FanReiner EschbachAmal Z. Malik
    • G06K9/00G06K9/40G06K9/36
    • H04N19/86
    • A method of removing ringing and blocking artifacts from a decompressed digital image. In one method, a background value of the digital image a background region and foreground regions is determined, and a threshold value is computed. A mapping of the digital image is then generated by thresholding the digital image based on the threshold value to produce a thresholded image, and enlarging the foreground regions of the thresholded image to form a map image. The mapping includes the background pixels of the map image. The background region of the decompressed digital image is then cleansed based on the mapping. In an alternate method, ringing artifacts are removed from a decompressed digital image based on a signal-to-noise ratio of the image. In yet another alternate embodiment, ringing artifacts are from a decompressed digital color image that includes a chrominance channel and a luminance channel. An alternate embodiment removes ringing and blocking artifacts.
    • 从解压缩的数字图像中去除振铃和阻塞伪影的方法。 在一种方法中,确定数字图像的背景区域和前景区域的背景值,并且计算阈值。 然后通过基于阈值阈值化数字图像来产生数字图像的映射,以产生阈值图像,并且放大阈值图像的前景区域以形成地图图像。 该映射包括地图图像的背景像素。 然后基于映射清理解压缩的数字图像的背景区域。 在替代方法中,基于图像的信噪比,从解压缩的数字图像中去除振铃伪像。 在又一替代实施例中,振铃伪影来自包括色度通道和亮度通道的解压缩数字彩色图像。 替代实施例消除振铃和阻塞伪影。
    • 96. 发明申请
    • Removing ringing and blocking artifacts from JPEG compressed document images
    • 从JPEG压缩文档图像中删除振铃和块状伪影
    • US20070280551A1
    • 2007-12-06
    • US11443830
    • 2006-05-31
    • Basak OztanZhigang FanReiner EschbachAmal Z. Malik
    • Basak OztanZhigang FanReiner EschbachAmal Z. Malik
    • G06K9/40G06K9/44
    • H04N19/86
    • A method of removing ringing and blocking artifacts from a decompressed digital image. In one method, a background value of the digital image a background region and foreground regions is determined, and a threshold value is computed. A mapping of the digital image is then generated by thresholding the digital image based on the threshold value to produce a thresholded image, and enlarging the foreground regions of the thresholded image to form a map image. The mapping includes the background pixels of the map image. The background region of the decompressed digital image is then cleansed based on the mapping. In an alternate method, ringing artifacts are removed from a decompressed digital image based on a signal-to-noise ratio of the image. In yet another alternate embodiment, ringing artifacts are from a decompressed digital color image that includes a chrominance channel and a luminance channel. An alternate embodiment removes ringing and blocking artifacts.
    • 从解压缩的数字图像中去除振铃和阻塞伪影的方法。 在一种方法中,确定数字图像的背景区域和前景区域的背景值,并且计算阈值。 然后通过基于阈值阈值化数字图像来产生数字图像的映射,以产生阈值图像,并且放大阈值图像的前景区域以形成地图图像。 该映射包括地图图像的背景像素。 然后基于映射清理解压缩的数字图像的背景区域。 在替代方法中,基于图像的信噪比,从解压缩的数字图像中去除振铃伪像。 在又一替代实施例中,振铃伪影来自包括色度通道和亮度通道的解压缩数字彩色图像。 替代实施例消除振铃和阻塞伪影。
    • 97. 发明申请
    • Determining the color match between image data and graphics objects
    • 确定图像数据和图形对象之间的颜色匹配
    • US20070109569A1
    • 2007-05-17
    • US11282850
    • 2005-11-17
    • Reiner EschbachZhigang FanDavid Rumph
    • Reiner EschbachZhigang FanDavid Rumph
    • H04N1/60
    • G06T7/90
    • A system/method of color match assessment for electronic documents includes receiving digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering the edge of the raster image object. The pixel color values defining the edge of the raster image object are processed to estimate a local color variance of the pixel color values. The local color variance is used to determine if the edge can be color matched to the bordering color graphics object. If the edge can be color matched, a match color for the edge is derived. The match color is associated with the digital data defining the electronic document so that a downstream object color match system can use the match color as needed, e.g., to adjust the color of the bordering color graphics object to ensure a match with the edge of the raster image object when the electronic document is printed using a xerographic printing process.
    • 用于电子文档的颜色匹配评估的系统/方法包括接收定义包括具有边缘的光栅图像对象和与光栅图像对象边缘接近的彩色图形对象的复合电子文档的数字数据。 处理定义光栅图像对象边缘的像素颜色值,以估计像素颜色值的局部颜色方差。 局部颜色方差用于确定边缘是否可以与边界颜色图形对象进行颜色匹配。 如果边缘可以匹配,则会导出边缘的匹配颜色。 匹配颜色与定义电子文档的数字数据相关联,使得下游对象颜色匹配系统可以根据需要使用匹配颜色,例如,调整边界颜色图形对象的颜色,以确保与边缘的匹配 使用静电印刷过程打印电子文档时的光栅图像对象。