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    Multibit screening of print documents in a PDL environment
    11.
    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。

    Segmentation tag cleanup system
    14.
    发明授权
    Segmentation tag cleanup system 失效
    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。

    Pixel level segmentation tag cleanup
    15.
    发明授权
    Pixel level segmentation tag cleanup 有权
    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。

    Block level analysis of segmentation tags
    16.
    发明授权
    Block level analysis of segmentation tags 有权
    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。

    Text vectorization using OCR and stroke structure modeling
    17.
    发明授权
    Text vectorization using OCR and stroke structure modeling 失效
    使用OCR和笔画结构建模的文本向量化

    公开(公告)号：US08244038B2

    公开(公告)日：2012-08-14

    申请号：US12332913

    申请日：2008-12-11

    申请人： Zhigang Fan ,  Francis K. Tse ,  Bingfeng Zhou ,  Yadong Mu ,  Tao He

    发明人： Zhigang Fan ,  Francis K. Tse ,  Bingfeng Zhou ,  Yadong Mu ,  Tao He

    IPC分类号： G06K9/18

    CPC分类号： G06K9/481 ,  G06K2209/01

    摘要： Systems and methods are described that facilitate dominant point detection for text in a scanned document. The dominant points are classified as “major” (e.g., structural) and “minor” (e.g., serif). A set of rules or parameters for each character is determined off-line. During the text vectorization, OCR is performed and the rules (parameters) associated with the recognized character are selected. Both major and minor dominant points are detected as a maximization process with the parameter set. For minor dominant points, additional processes are optionally employed.

    摘要翻译： 描述了促进扫描文档中的文本的主要点检测的系统和方法。 优势点被归类为“主要”（例如，结构）和“次要”（例如，衬线）。 离线确定每个字符的一组规则或参数。 在文本向量化期间，执行OCR并选择与识别的字符相关联的规则（参数）。 主要和次要主要点被检测为具有参数集的最大化过程。 对于较小的优势点，可以采用额外的过程。

    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
    18.
    发明授权
    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
    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。

    Method for controlling the processing of digital image signals
    19.
    发明授权
    Method for controlling the processing of digital image signals 失效
    用于控制数字图像信号处理的方法

    公开(公告)号：US5390029A

    公开(公告)日：1995-02-14

    申请号：US185075

    申请日：1994-01-24

    申请人： Leon C. Williams ,  Francis K. Tse ,  Robert F. Buchheit

    发明人： Leon C. Williams ,  Francis K. Tse ,  Robert F. Buchheit

    IPC分类号： H04N1/387 ,  G06T3/00 ,  G09G5/14 ,  H04N1/40 ,  G06K9/36

    CPC分类号： G09G5/14

    摘要： A method and apparatus for controlling the execution of image processing operations carried out on an array of image signals, the specific operations having been identified by a plurality of predefined windows. The windows are divided into a plurality of non-overlapping tiles, the boundaries of which correspond to transitions from one window region to another. Each tile therefore defines an exclusive region within the array of image signals, and the image processing operations to be applied to the signals within the boundaries of that region. Tile data is stored in one of two memory banks, thereby enabling bank switching and reprogramming of the device in real-time to permit management of complex window shapes. The apparatus is designed to efficiently manage the identification of tile regions while minimizing the required decoding hardware. The apparatus also provides flexibility of programming resulting in greater efficiency of memory usage.

    摘要翻译： 一种用于控制对图像信号阵列执行的图像处理操作的执行的方法和装置，该特定操作已经被多个预定窗口识别。 窗口被分成多个不重叠的瓦片，其边界对应于从一个窗口区域到另一个窗口区域的过渡。 因此，每个瓦片在图像信号阵列内定义独占区域，并且将图像处理操作应用于该区域的边界内的信号。 平铺数据存储在两个存储体之一中，从而能够实时地对设备进行库切换和重新编程，以允许管理复杂的窗口形状。 该设备被设计为在最小化所需的解码硬件的同时有效地管理瓦片区域的识别。 该设备还提供了编程的灵活性，从而提高了存储器使用的效率。