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1. 发明授权

US06674899B2 Automatic background detection of scanned documents 有权
标题翻译：扫描文件的自动背景检测
公开(公告)号：US06674899B2
公开(公告)日：2004-01-06
申请号：US09739405
申请日：2000-12-18
申请人： Ramesh Nagarajan , Xing Li , Francis K. Tse
发明人： Ramesh Nagarajan , Xing Li , Francis K. Tse
IPC分类号： G06K900
CPC分类号： H04N1/4074 , H04N1/38
摘要： A method for generating a background statistics that distinguishes between gray level information from document areas and non-document areas. The method includes determining a full page background statistics from selected pixels within a scanned area; determining a sub-region background statistics from selected pixels within a sub-region of the scanned area; determining if the sub-region background statistics corresponds to image data from a non-document area; determining if the full page background statistics is corrupted; and generating a validated full page background statistics if the full page background statistics is corrupted.
摘要翻译：一种用于生成从文档区域和非文档区域区分灰度级信息的背景统计信息的方法。该方法包括从扫描区域内的所选像素确定全页背景统计; 从扫描区域的子区域内的所选像素确定子区域背景统计; 确定子区域背景统计是否对应于来自非文档区域的图像数据; 确定全页背景统计信息是否已损坏; 并且如果整页背景统计信息已损坏，则生成经过验证的全页背景统计信息。

2. 发明授权

US06625312B1 Document classification using segmentation tag statistics 有权
标题翻译：文档分类使用分段标签统计
公开(公告)号：US06625312B1
公开(公告)日：2003-09-23
申请号：US09514626
申请日：2000-02-28
申请人： Ramesh Nagarajan , Xing Li , Francis K. Tse
发明人： Ramesh Nagarajan , Xing Li , Francis K. Tse
IPC分类号： G06K934
CPC分类号： G06K9/00456 , H04N1/40062
摘要： A first aspect of the of the present invention is a system and method for classifying an input document based a segmentation tag statistics. The method includes receiving first pass segmentation tags for a plurality of pixels within a block of image data; determining an image type for the block of image data using statistics compiled from the first pass segmentation tags; and generating rendering tags for pixels within the block of image data as function of second pass segmentation tags and the image type. Beneficially, the image type identified for the block of image data is used to optimize the rendering process.
摘要翻译：本发明的第一方面是一种基于分段标签统计分类输入文档的系统和方法。该方法包括接收图像数据块内的多个像素的第一遍分割标签; 使用从第一遍分割标签编译的统计信息确定图像数据块的图像类型; 以及为图像数据块内的像素生成渲染标记，作为第二遍分割标签和图像类型的函数。有利地，为图像数据块识别的图像类型被用于优化渲染过程。

3. 发明授权

US06650439B1 Segmentation tag cleanup system 失效
标题翻译：分段标签清理系统
公开(公告)号：US06650439B1
公开(公告)日：2003-11-18
申请号：US09393094
申请日：1999-09-09
申请人： Ramesh Nagarajan , Xing Li , Francis K. Tse
发明人： Ramesh Nagarajan , Xing Li , Francis K. Tse
IPC分类号： G06K1502
CPC分类号： H04N1/40062
摘要： A system and method for method of cleaning segmentation tags is disclosed. A method in accordance with the present invention comprises receiving a plurality of segmentation tags; generating block level tags in response to the received segmentation tags wherein each block level tag is a representative tag for a block of received segmentation tags; and cleaning selected ones of the received segmentation tags using a window of neighboring block level tags.
摘要翻译：公开了一种清洁分段标签的方法的系统和方法。根据本发明的方法包括：接收多个分割标签; 响应于所接收的分段标签生成块级标签，其中每个块级标签是用于所接收的分段标签的块的代表标签; 以及使用相邻块级标签的窗口清理所接收的分段标签中的所选择的一个。

4. 发明授权

US06639692B1 Pixel level segmentation tag cleanup 有权
标题翻译：像素级分割标签清理
公开(公告)号：US06639692B1
公开(公告)日：2003-10-28
申请号：US09393080
申请日：1999-09-09
申请人： Xing Li , Ramesh Nagarajan , Francis K. Tse
发明人： Xing Li , Ramesh Nagarajan , Francis K. Tse
IPC分类号： G06K1502
CPC分类号： H04N1/40062 , G06T7/11 , G06T7/187
摘要： A system and method of processing segmentation tags is disclosed. In accordance with the present invention, a method for processing segmentation tags that receives blocks of segmentation tags each of which has an associated block level tag that is representative of the segmentation tags within the block. The method positions a neighborhood window about a current block and a neighboring block and cleans a target segmentation tag within the current block based upon the block level tags within the neighborhood window using a set of tag cleaning rules.
摘要翻译：公开了一种处理分段标签的系统和方法。根据本发明，一种用于处理分段标签的方法，所述分割标签接收分段标签块，每个标记具有代表块内的分段标签的相关联的块级标签。该方法定位关于当前块和相邻块的邻域窗口，并使用一组标签清理规则，基于邻域窗口内的块级标签来清除当前块内的目标分段标签。

5. 发明授权

US06516091B1 Block level analysis of segmentation tags 有权
标题翻译：分段标签的块级分析
公开(公告)号：US06516091B1
公开(公告)日：2003-02-04
申请号：US09392902
申请日：1999-09-09
申请人： Ramesh Nagarajan , Xing Li , Michael E. Meyers , Francis K. Tse
发明人： Ramesh Nagarajan , Xing Li , Michael E. Meyers , Francis K. Tse
IPC分类号： G06K900
CPC分类号： H04N1/40062
摘要： A system for processing segmentation tags to generate a block level tag representative of a group of segmentation tags. The system includes first and second statistic compilation circuits, each of the compilation circuits being connected to receive segmentation tags and compile a statistic for a plurality of the received segmentation tags. An address controller connected to the first and second statistic compilation circuits operates to select one of the first and second compilation circuits to receive the segmentation tags.
摘要翻译：一种用于处理分段标签以产生代表一组分段标签的块级标签的系统。该系统包括第一和第二统计量编译电路，每个编译电路被连接以接收分段标签并编译多个接收的分段标签的统计量。连接到第一和第二统计编译电路的地址控制器操作以选择第一和第二编译电路中的一个来接收分段标签。

6. 发明授权

US06782129B1 Image segmentation apparatus and method 失效
标题翻译：图像分割装置及方法
公开(公告)号：US06782129B1
公开(公告)日：2004-08-24
申请号：US09158884
申请日：1998-09-23
申请人： Xing Li , Michael E. Meyers , Francis K. Tse
发明人： Xing Li , Michael E. Meyers , Francis K. Tse
IPC分类号： G06K934
CPC分类号： H04N1/40062
摘要： A method and apparatus are provided for processing image data. A peak count and a valley count are determined within a window which includes a plurality of subwindows. An overall count is determined using the greater of the peak count and the valley count for each subwindow. The image data may then be classified based on this determination.
摘要翻译：提供了一种用于处理图像数据的方法和装置。在包括多个子窗口的窗口内确定峰值计数和谷值计数。使用每个子窗口的峰值计数和谷值计数中的较大值来确定总体计数。然后可以基于该确定对图像数据进行分类。

7. 发明授权

US06181834B2 Hybrid image reduction method and apparatus with moir{acute over (e)} suppression 有权
标题翻译：具有莫尔抑制的混合图像缩小方法和装置
公开(公告)号：US06181834B2
公开(公告)日：2001-01-30
申请号：US09157015
申请日：1998-09-18
申请人： Xing Li , Francis K. Tse
发明人： Xing Li , Francis K. Tse
IPC分类号： G06K932
CPC分类号： G06T3/4007 , H04N1/40075
摘要： A method and apparatus for digital image reduction using an improved “extendible” perspective projection technique which allows for flexible control of the averaging cell or window size separately from the reduction ratio to improve moir{acute over (e)} suppression or sharpness as desired in the resulting reduced-size image. The extendible perspective projection technique can also be implemented together with ordinary perspective projection or together with a combined one-dimensional filter and linear interpolation technique to produce a reduced-size image of a quality comparable to those produced by the prior technique of using a two-dimensional pre-filter prior to interpolation at a much lesser cost due to the reduced number of required scanline buffers.
摘要翻译：使用改进的“可扩展”透视投影技术的数字图像缩小的方法和装置，其允许与缩小比率分开地灵活地控制平均单元格或窗口尺寸，以改善所得缩小尺寸图像中所需的莫尔条纹抑制或锐度。可伸缩透视投影技术还可以与普通透视投影一起实现，或者与组合的一维滤光片和线性内插技术一起实现，以产生质量相当于使用二维滤镜的现有技术产生的图像质量的尺寸较小的图像，由于所需的扫描线缓冲器的数量减少，插值之前的三维预滤波器以非常低的成本。

8. 发明授权

US08068257B2 Color printing reducing artifacts and banding by rendering black dots, replacing dots with process black, and adding non-black dots for different subsets of black dots 有权
标题翻译：彩色打印通过渲染黑点减少伪影和条纹，用过程黑色代替点，并为不同的黑点子集添加非黑点
公开(公告)号：US08068257B2
公开(公告)日：2011-11-29
申请号：US12390583
申请日：2009-02-23
申请人： Xing Li , Francis K. Tse , Zhenhuan Wen , David J. Metcalfe
发明人： Xing Li , Francis K. Tse , Zhenhuan Wen , David J. Metcalfe
IPC分类号： H04N1/52 , H04N1/58 , H04N1/034 , B41J2/205
CPC分类号： H04N1/6022 , H04N1/52
摘要： A method of printing comprising setting a pixel black value of K for an ink limit and identifying each of black dots of a first subset of black dots having pixel black value K greater than the ink limit, and pixel color value of cyan, magenta, and yellow equal to zero. The method further comprises rendering only K for a pixel value for the first subset of black dots and replacing each of black dots of a second subset of black dots of a halftoned bit map for a predetermined area with a process black dot. The method still further comprises adding a non-black dot to each of black dots of a third subset of black dots of the bit-mapped data, wherein the halftoned bit map is generated by halftoning continuous tone data; wherein the black dots of the third subset comprises a percentage of all the black dots that tends to generally increase as a ratio of black coverage to total coverage in the predetermined area increases; wherein the first, second, and third subset comprises black dots that are mutually exclusive; and, printing the bit map.
摘要翻译：一种打印方法，包括：将墨水极限的像素黑值设置为K，并识别具有比墨水限制大的像素黑色值K的黑色第一子集的黑点，以及青色，品红色和黄色等于零。该方法还包括仅为黑色点的第一子集渲染像素值的K，并用处理黑点代替预定区域的半色调位图的第二子黑点的每个黑点。该方法还包括向比特映射数据的黑点的第三子集中的每个黑点添加非黑点，其中通过对连续色调数据进行半色调生成半色调比特图; 其中所述第三子集的黑点包括随着所述预定区域中的黑色覆盖率与总覆盖率的比率增加而趋于一般增加的所有黑点的百分比; 其中所述第一，第二和第三子集包括相互排斥的黑点; 并打印位图。

9. 发明授权

US06389164B2 Image segmentation apparatus and method 有权
标题翻译：图像分割装置及方法
公开(公告)号：US06389164B2
公开(公告)日：2002-05-14
申请号：US09158788
申请日：1998-09-23
申请人： Xing Li , Michael E. Meyers , Francis K. Tse
发明人： Xing Li , Michael E. Meyers , Francis K. Tse
IPC分类号： G06K934
CPC分类号： G06T5/20 , G06T7/11 , G06T2207/10016 , G06T2207/30176
摘要： The present invention provides a method and apparatus for classifying image data. A video peak/valley counter may count peaks and valleys within a window of the input image data. The apparatus and method checks whether any peaks or valleys are located within a neighborhood of a pixel under consideration.
摘要翻译：本发明提供了一种用于对图像数据进行分类的方法和装置。视频峰/谷计数器可以计算输入图像数据的窗口内的峰谷。该装置和方法检查是否有任何峰或谷位于正在考虑的像素的邻域内。

10. 发明授权

US06272240B1 Image segmentation apparatus and method 有权
标题翻译：图像分割装置及方法
公开(公告)号：US06272240B1
公开(公告)日：2001-08-07
申请号：US09159475
申请日：1998-09-23
申请人： Xing Li , Michael E. Meyers , Francis K. Tse
发明人： Xing Li , Michael E. Meyers , Francis K. Tse
IPC分类号： G06K934
CPC分类号： G06K9/00456 , H04N1/40062
摘要： The present invention provides a method and apparatus for classifying image data. A video average may be determined from the image data. Peak detection may then be limited to an area within the image data where the video average is above a first threshold. Valley detection may be limited to an area where the video average is below a second threshold.
摘要翻译：本发明提供了一种用于对图像数据进行分类的方法和装置。可以从图像数据确定视频平均。然后，峰值检测可以被限制在图像数据内的视频平均值高于第一阈值的区域。谷检测可以限于视频平均值低于第二阈值的区域。

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