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    Multibit screening of print documents in a PDL environment
    1.
    发明授权
    Multibit screening of print documents in a PDL environment 有权
    打印文档在PDL环境中的多位筛选

    公开(公告)号：US06437872B1

    公开(公告)日：2002-08-20

    申请号：US09158155

    申请日：1998-09-22

    申请人： Michael L. Davidson ,  Francis K. Tse ,  Harry L. Parker ,  Ramesh Nagarajan

    发明人： Michael L. Davidson ,  Francis K. Tse ,  Harry L. Parker ,  Ramesh Nagarajan

    IPC分类号： G06F1300

    CPC分类号： G06K15/02 ,  G06K15/1852

    摘要： A high addressable multibit screening device and method for use in a PDL interpreter environment achieve improved printing resolution and quality. A PDL interpreter receives a PDL document from a host source, which identifies one or more objects that can be fully toned (black) or partially toned (line art or images). Each of these objects can be processed differently. Fully toned objects are processed within the interpreter and directly output in a predetermined output. Partially toned objects are sent to a high addressable screening module within the interpreter for processing prior to outputting in a desired output format. The high addressable screening module screens the partially toned objects to obtain multibit screened data for output. This can be achieved by converting an array of single threshold values to an array of three or more sub-threshold values in a way that preserves the pattern specified by the original threshold array (one bit per pixel image), but improves the quality of the rendered image relative to the quality of a one bit per pixel (per colorant) image. The partially toned data is then output with the fully toned objects for subsequent printing. This achieves an increase in available tints and spatial frequency for a given halftone pattern while reducing memory requirements.

    摘要翻译： 用于PDL解释器环境的高可寻址多位屏蔽设备和方法可实现改进的打印分辨率和质量。 PDL解释器从主机源接收PDL文档，其标识可以被完全调色（黑色）或部分调色（线条画或图像）的一个或多个对象。 可以对这些对象中的每一个进行不同的处理。 完全调色的物体在解释器内处理，并直接输出到预定的输出。 将部分色调对象发送到解释器内的高可寻址筛选模块，以便在以期望的输出格式输出之前进行处理。 高可寻址屏蔽模块屏幕部分调色对象以获得多位屏蔽数据进行输出。 这可以通过将保持由原始阈值阵列指定的模式（每像素图像一个位）的方式将单个阈值的阵列转换为三个或更多个子阈值的阵列来实现，但是提高了 渲染图像相对于每像素一个像素（每个着色剂）图像的质量。 然后用完全调色的物体输出部分色调的数据以供后续打印。 这实现了给定半色调图案的可用色调和空间频率的增加，同时减少了存储器需求。

    Method and system for generating contone encoded binary print data streams
    2.
    发明授权
    Method and system for generating contone encoded binary print data streams 失效
    用于生成连续编码的二进制打印数据流的方法和系统

    公开(公告)号：US07580569B2

    公开(公告)日：2009-08-25

    申请号：US11268147

    申请日：2005-11-07

    申请人： Francis K. Tse ,  Ramesh Nagarajan

    发明人： Francis K. Tse ,  Ramesh Nagarajan

    IPC分类号： G06K9/34

    CPC分类号： H04N1/4092

    摘要： A method and system to convert an image described in a page description language to a contone image. The contone image is halftoned and encoded to generate image data including edge tag data and image data. A tagged state value of each pixel of image data within a predefined neighborhood of pixels is determined. The image data is filtered using a predetermined set of filter weighting values wherein each pixel of image data within the predefined neighborhood of pixels has an associated filter weighting value. A predetermined filtered image value is assigned to each pixel having a tagged state indicating an edge pixel. A summation of all filtered image values for the predefined neighborhood of pixels is assigned when the tagged state of the pixel is a non-edge pixel.

    摘要翻译： 将页面描述语言中描述的图像转换为连字图像的方法和系统。 连续色调图像被半色调编码以产生包括边缘标签数据和图像数据的图像数据。 确定预定义像素邻域内的图像数据的每个像素的标记状态值。 使用预定的一组过滤器加权值来过滤图像数据，其中预定的像素邻域内的图像数据的每个像素具有相关联的滤波器权重值。 将预定的滤波图像值分配给具有指示边缘像素的带状态的每个像素。 当像素的标记状态是非边缘像素时，分配用于预定义像素邻域的所有滤波图像值的求和。

    Method and system for propagating selective amounts of error in a hybrid screening device
    3.
    发明授权
    Method and system for propagating selective amounts of error in a hybrid screening device 有权
    用于在混合筛选装置中传播选择量误差的方法和系统

    公开(公告)号：US06519367B2

    公开(公告)日：2003-02-11

    申请号：US09158993

    申请日：1998-09-23

    申请人： Ramesh Nagarajan ,  William A. Cook ,  Francis K. Tse

    发明人： Ramesh Nagarajan ,  William A. Cook ,  Francis K. Tse

    IPC分类号： G06K936

    CPC分类号： H04N1/40075 ,  H04N1/4052

    摘要： A method and system implements selective, memory efficient, control over the amount of error diffused in a hybrid screening system. An image context error computer receives a pixel classification and an error value. Upon receiving these data, a set of shift registers supplies a fractional portion of the error value to an error diffusion circuit. A bypass thresholder receives screened video and applies simple thresholding. In parallel with the simple thresholding, an error diffuser receives screened video and applies error diffusion. The results of the two processes are output to a multiplexer which outputs one based on the pixel classification.

    摘要翻译： 一种方法和系统实现选择性，记忆效率高，控制混合筛选系统中扩散的误差量。 图像上下文错误计算机接收像素分类和错误值。 一旦接收到这些数据，一组移位寄存器将误差值的小数部分提供给误差扩散电路。 旁路阈值器接收被屏蔽的视频并应用简单的阈值。 与简单的阈值并行，错误扩散器接收屏幕视频并应用误差扩散。 将两个处理的结果输出到基于像素分类输出的多路复用器。

    METHOD FOR SELECTIVE COMPRESSION FOR PLANNED DEGRADATION AND OBSOLENCE OF FILES
    5.
    发明申请
    METHOD FOR SELECTIVE COMPRESSION FOR PLANNED DEGRADATION AND OBSOLENCE OF FILES 审中-公开
    用于选择性压缩的方案用于计划的降解和文件的吸收

    公开(公告)号：US20100042655A1

    公开(公告)日：2010-02-18

    申请号：US12193324

    申请日：2008-08-18

    申请人： Francis K. Tse ,  Minette Ann Beabes ,  Ramesh Nagarajan ,  Susan Marie Zak

    发明人： Francis K. Tse ,  Minette Ann Beabes ,  Ramesh Nagarajan ,  Susan Marie Zak

    IPC分类号： G06F17/30

    CPC分类号： G06F16/122

    摘要： A system and method manages a file storage system by defining an arbitration policy, the arbitration policy defining a pre-defined usage level threshold and defining implementation priorities for a plurality of storage management mitigation actions, each storage management mitigation action defining a distinct action to be taken to reduce the usage level of the file storage system and a parameter for selecting which file or files stored in the file storage system qualify for the storage management mitigation action. If a usage level of the file storage system is greater than the pre-defined usage level threshold, a storage management mitigation action is selected from the plurality of storage management mitigation actions. Which files that qualify for the selected storage management mitigation action is determined and the selected storage management mitigation action is applied to the files determined to qualify for the selected storage management mitigation action to reduce the usage level of the file storage system.

    摘要翻译： 系统和方法通过定义仲裁策略来管理文件存储系统，所述仲裁策略定义预定义的使用级别阈值并且定义多个存储管理缓解动作的实现优先级，每个存储管理缓解动作定义了明确的动作 被采取以减少文件存储系统的使用水平和用于选择存储在文件存储系统中的文件或文件的参数有资格进行存储管理缓解动作的参数。 如果文件存储系统的使用级别大于预定义的使用级别阈值，则从多个存储管理缓解动作中选择存储管理缓解动作。 确定符合选定的存储管理缓解措施的哪些文件，并且将所选择的存储管理缓解动作应用于被确定为限定所选择的存储管理缓解动作的文件，以减少文件存储系统的使用水平。

    Electronic image registration for a scanner
    6.
    发明授权
    Electronic image registration for a scanner 失效
    扫描仪的电子图像注册

    公开(公告)号：US06999209B2

    公开(公告)日：2006-02-14

    申请号：US10854010

    申请日：2004-05-26

    申请人： Nancy R. Kelly ,  Ramesh Nagarajan ,  Francis K. Tse

    发明人： Nancy R. Kelly ,  Ramesh Nagarajan ,  Francis K. Tse

    IPC分类号： H04N1/04

    CPC分类号： G06T3/608 ,  G06K9/32 ,  H04N1/3878

    摘要： A system electronically registers an image on an input document. The system includes a scanner for generating an image data stream representing an electronic image of the image on the input document and an edge detecting circuit for detecting edge data within the image data stream. A circuit detects a first corner of a leading edge of the input document based on the detected edge data and for establishing a first coordinate value therefrom and a second corner of a leading edge of the input document based on the detected edge data and for establishing a second coordinate value therefrom. The system further determines a minimum and maximum location for a leading edge of the scanned document and determines a minimum and maximum location for a trailing edge of the scanned document. An image window is generated representing valid image data to processed and rendered based on the minimum and maximum location for a leading edge of the scanned document, the minimum and maximum location for a trailing edge of the scanned document, the first coordinate value, and the second coordinate value.

    摘要翻译： 系统在输入文档上电子地注册图像。 该系统包括用于生成表示输入文档上的图像的电子图像的图像数据流的扫描器和用于检测图像数据流内的边缘数据的边缘检测电路。 电路基于检测到的边缘数据检测输入文档的前沿的第一角，并且基于检测到的边缘数据和从输入文档的前沿的第二角度建立第一坐标值和第二角，并且建立 第二坐标值。 系统进一步确定扫描文档前缘的最小和最大位置，并确定扫描文档后缘的最小和最大位置。 生成基于扫描文档的前沿的最小和最大位置处理和呈现的有效图像数据的图像窗口，扫描文档的后缘的最小和最大位置，第一坐标值和 第二坐标值。

    Automatic background detection of scanned documents
    7.
    发明授权
    Automatic background detection of scanned documents 有权
    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。

    Document classification using segmentation tag statistics
    8.
    发明授权
    Document classification using segmentation tag statistics 有权
    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。