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31. 发明申请

US20050063013A1 Enhancing black & white image quality with limited image processing resources 审中-公开
标题翻译：以有限的图像处理资源提升黑白图像质量
公开(公告)号：US20050063013A1
公开(公告)日：2005-03-24
申请号：US10667703
申请日：2003-09-22
申请人： Xing Li , Ramesh Nagarajan
发明人： Xing Li , Ramesh Nagarajan
IPC分类号： G06T5/00 , H04N1/40 , G06K9/34 , G06K9/54 , G06K15/00 , G06T7/00
CPC分类号： H04N1/40 , G06T5/001 , G06T2207/10008 , G06T2207/20012
摘要： What is disclosed is a system and method to improve the black and white image quality of tag-based color imaging systems in a color image path by making use of the additional two channels available. The present method exploits the resources of the two un-utilized channels during black and white processing. The single channel black-and white image is replicated into all three channels at the output of the storage memory. Segmentation tags are fed into each channel to control the image processing. Additional filters, TRCs and rendering methods will be available due to processing in all the 3 channels. Resources may additionally include such things as: filters, TRC mapping, and halftoning modules. The video output from the output image processing is merged back based on the segmentation tags. Different de-screen filters with various cut-off frequencies and enhancement filters are applied to the image based on pixel classification. One example of such an application is to use different cut-off frequency filters for text-on-tint pixels and different halftone frequency pixels. The number of TRCs and halftone screens available per page has also increased by 3 times. The method also applies to any image path that has extra channels available for certain scanning/copying modes.
摘要翻译：公开的是通过利用可用的附加两个通道来改善彩色图像路径中基于标签的彩色成像系统的黑白图像质量的系统和方法。本方法在黑白处理中利用两个未被利用的信道的资源。单通道黑白图像被复制到存储存储器输出端的所有三个通道中。分割标签被馈送到每个通道以控制图像处理。由于所有3个通道中的处理，附加的过滤器，TRC和渲染方法将可用。资源可能还包括以下内容：过滤器，TRC映射和半色调模块。基于分割标签将输出图像处理的视频输出合并回来。基于像素分类，将具有各种截止频率和增强滤波器的不同去屏滤波器应用于图像。这种应用的一个例子是对色彩文字像素和不同的半色调频率像素使用不同的截止频率滤波器。每页可用的TRC和半色调屏幕数量也增加了3倍。该方法也适用于具有可用于特定扫描/复印模式的额外通道的任何图像路径。

32. 发明申请

US20050036694A1 Compression of mixed raster content (MRC) image data 失效
标题翻译：压缩混合光栅内容（MRC）图像数据
公开(公告)号：US20050036694A1
公开(公告)日：2005-02-17
申请号：US10639391
申请日：2003-08-12
申请人： Xing Li , Ramesh Nagarajan , Ammal Malik
发明人： Xing Li , Ramesh Nagarajan , Ammal Malik
IPC分类号： G06K9/36 , G06K9/54 , H04N1/387 , H04N1/58
CPC分类号： H04N1/58 , H04N1/3871
摘要： In a mixed raster content (MRC) image data format, where a separation plane is used to define portions of the image to compressed in a lossy or lossless manner, edge pixels are identified in the separation plane. Each edge pixel is modified to assume a maximum luminance and most neutral chrominance found among neighboring pixels. The modification of the edge pixel data minimizes artifacts such as fringe effects when the image data is compressed and subsequently decompressed.
摘要翻译：在混合光栅内容（MRC）图像数据格式中，使用分离平面来定义要以有损或无损的方式压缩的图像的部分，边缘像素在分离平面中被识别。修改每个边缘像素以呈现在相邻像素中发现的最大亮度和最中性色度。当图像数据被压缩并随后解压缩时，边缘像素数据的修改最小化诸如边缘效应之类的伪影。

33. 发明申请

US20080049238A1 METHOD AND SYSTEM FOR AUTOMATIC WINDOW CLASSIFICATION IN A DIGITAL REPROGRAPHIC SYSTEM 审中-公开
标题翻译：数字图像系统中自动窗口分类的方法与系统
公开(公告)号：US20080049238A1
公开(公告)日：2008-02-28
申请号：US11467584
申请日：2006-08-28
申请人： Ramesh Nagarajan , Xing Li , Peter D. McCandlish , Francis Kapo Tse
发明人： Ramesh Nagarajan , Xing Li , Peter D. McCandlish , Francis Kapo Tse
IPC分类号： G06F15/00
CPC分类号： G06K9/38
摘要： A method and system for processing an image in a digital reprographic system that performs a first segmentation process upon a contone digital image to identify one of a plurality of image data types for each pixel in the contone digital image, generating tags, binarizing the contone digital image and storing the binary image as an intermediate format. This binary image is later reconstructed to generate a reconstructed contone digital image; and performing a second segmentation process upon the reconstructed contone digital image to identify areas of the reconstructed contone digital image with common image data types.
摘要翻译：一种用于处理数字复制系统中的图像的方法和系统，其对连续数字图像执行第一分割处理，以识别连续数字图像中的每个像素的多个图像数据类型中的一个，生成标签，二进制化连续数字数字图像并将二进制图像存储为中间格式。该二进制图像随后被重建以产生重建的连续色数字图像; 以及对重建的连续色调数字图像执行第二分割处理以识别具有公共图像数据类型的重建连续数字图像的区域。

34. 发明申请

US20070098262A1 Dynamic range detection and adjustment 失效
标题翻译：动态范围检测和调整
公开(公告)号：US20070098262A1
公开(公告)日：2007-05-03
申请号：US11263249
申请日：2005-10-31
申请人： Ammal Malik , Xing Li , Ramesh Nagarajan
发明人： Ammal Malik , Xing Li , Ramesh Nagarajan
IPC分类号： G06K9/00 , H04N1/40
CPC分类号： H04N1/38 , G06K9/38 , G06K2209/01 , H04N1/403
摘要： An original image is received. The original image is divided into tiles. A whitepoint value of each tile is determined. A blackpoint value of each tile is determined. A whitepoint value of each pixel in the image is determined by interpolating the determined whitepoint values of neighboring tiles. A blackpoint of each pixel in the image is determined by interpolating the determined blackpoint values of neighboring tiles.
摘要翻译：收到原始图像。原始图像分为瓷砖。确定每个瓦片的白色点值。确定每个瓦片的黑点值。图像中每个像素的白点值通过内插确定的相邻瓦片的白点值来确定。通过内插确定的相邻瓦片的黑点值来确定图像中每个像素的黑点。

35. 发明授权

US07190837B2 Compression of mixed raster content (MRC) image data 失效
标题翻译：压缩混合光栅内容（MRC）图像数据
公开(公告)号：US07190837B2
公开(公告)日：2007-03-13
申请号：US10639391
申请日：2003-08-12
申请人： Xing Li , Ramesh Nagarajan , Ammal Z. Malik
发明人： Xing Li , Ramesh Nagarajan , Ammal Z. Malik
IPC分类号： G06K9/36 , G06K9/34
CPC分类号： H04N1/58 , H04N1/3871
摘要： In a mixed raster content (MRC) image data format, where a separation plane is used to define portions of the image to compressed in a lossy or lossless manner, edge pixels are identified in the separation plane. Each edge pixel is modified to assume a maximum luminance and most neutral chrominance found among neighboring pixels. The modification of the edge pixel data minimizes artifacts such as fringe effects when the image data is compressed and subsequently decompressed.
摘要翻译：在混合光栅内容（MRC）图像数据格式中，使用分离平面来定义要以有损或无损的方式压缩的图像的部分，边缘像素在分离平面中被识别。修改每个边缘像素以呈现在相邻像素中发现的最大亮度和最中性色度。当图像数据被压缩并随后解压缩时，边缘像素数据的修改最小化诸如边缘效应之类的伪影。

36. 发明授权

US07058222B2 Automatic background detection of scanned documents 失效
公开(公告)号：US07058222B2
公开(公告)日：2006-06-06
申请号：US10173462
申请日：2002-06-14
申请人： Xing Li , Ramesh Nagarajan , Mihai Cuciurean-zapan
发明人： Xing Li , Ramesh Nagarajan , Mihai Cuciurean-zapan
IPC分类号： G06K9/00 , G06K15/00
CPC分类号： H04N1/4072 , G06K9/38 , G06K2209/01 , G06T7/194 , G06T2207/10008 , G06T2207/30176
摘要： A background detection process that analyzes background information for the purpose of limiting the impact of intensity information obtained from non-document areas includes: identifying a first white peak from pixels within a first document region; identifying a second white peak from pixels within a second document region; determining if the first white peak was identified using image data from outside of the input document; and if so, identifying a third white peak from pixels within the first document region based on the second white peak.

37. 发明授权

US07570394B2 System for determining the size of an original image, such as in a digital copier 失效
标题翻译：用于确定原始图像的尺寸的系统，例如在数字复印机中
公开(公告)号：US07570394B2
公开(公告)日：2009-08-04
申请号：US10401340
申请日：2003-03-27
申请人： Xing Li , Ramesh Nagarajan , Ammal Z. Malik
发明人： Xing Li , Ramesh Nagarajan , Ammal Z. Malik
IPC分类号： H04N1/40
CPC分类号： H04N1/00681
摘要： An input scanner, such as used in a digital copier, accepts original documents on sheets of any number of possible sizes within a single job. The video output of the scanner is applied to an algorithm to determine the length, along a process direction, of useful image data on each sheet. From such a determination, a size of output copy sheets can be automatically selected, or the image can be automatically changed in size in subsequent processing. A prescan of the original documents is not required.
摘要翻译：诸如在数字复印机中使用的输入扫描器在单个作业内接受任何数量可能尺寸的纸张上的原始文档。将扫描仪的视频输出应用于算法，以沿着处理方向确定每张纸上的有用图像数据的长度。根据这样的判断，可以自动选择输出副本的大小，或者可以在随后的处理中自动改变图像大小。不需要原始文件的预扫描。

38. 发明授权

US07039232B2 Block level analysis of segmentation tags 失效
公开(公告)号：US07039232B2
公开(公告)日：2006-05-02
申请号：US10172872
申请日：2002-06-14
申请人： Ramesh Nagarajan , Xing Li
发明人： Ramesh Nagarajan , Xing Li
IPC分类号： G06K9/34
CPC分类号： H04N1/4092 , G06T7/12 , G06T7/143 , G06T2207/10016 , G06T2207/20021
摘要： A method for processing segmentation tags to generate a block level tag representative of a group of segmentation tags includes identifying a block of the segmentation tags; compiling a block statistic from a plurality of segmentation tags within the block; determining a most predominant segmentation tag and a second most predominant segmentation tag in the plurality of segmentation tags; and generating a block level tag for the block based on the most predominant segmentation tag, the second most predominant segmentation tag and the block statistic.

39. 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。

40. 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。

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