公开(公告)号：US20100098351A1

公开(公告)日：2010-04-22

申请号：US12254432

申请日：2008-10-20

申请人： Amal Z. Malik ,  Xing Li

发明人： Amal Z. Malik ,  Xing Li

IPC分类号： G06K9/40

CPC分类号： G06K9/34 ,  G06K9/38 ,  G06K2209/01 ,  G06T5/003 ,  G06T5/20 ,  G06T7/12 ,  G06T7/136 ,  G06T7/194 ,  G06T2207/20192 ,  G06T2207/30176 ,  H04N1/41 ,  H04N1/58

摘要： A method for improving image quality of edge pixels, when separating an image signal into a set of image planes is provided. The method includes searching for a minimum value and a maximum value within at least one predefined neighborhood pixel window centered on a current pixel in the image signal; and conditionally switching the edge pixels to either the minimum value or the maximum value in the foreground and background planes respectively, or to a value of a specified characteristic of the current pixel, based on predetermined criteria. One such predetermined criteria for this conditional switching of the edge pixels comprises comparing the minimum or maximum luminance values in the predefined neighborhood window of the current pixel and their corresponding chrominance values to some predetermined thresholds which are characteristic of the image for the foreground and background planes, respectively.

摘要翻译： 提供了一种用于在将图像信号分离成一组图像平面时提高边缘像素的图像质量的方法。 该方法包括在以图像信号中的当前像素为中心的至少一个预定邻域像素窗口内搜索最小值和最大值; 并且基于预定标准，有条件地将边缘像素切换到前景和背景平面中的最小值或最大值，或者切换到当前像素的指定特性的值。 用于边缘像素的这种条件切换的一个这样的预定标准包括将当前像素的预定邻域窗口中的最小或最大亮度值与其对应的色度值进行比较，作为前景和背景平面图像的特征的一些预定阈值 ， 分别。

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。

公开(公告)号：US07480078B2

公开(公告)日：2009-01-20

申请号：US11116894

申请日：2005-04-28

申请人： Yungran Choi ,  Xing Li ,  Daniel A. Mohabir

发明人： Yungran Choi ,  Xing Li ,  Daniel A. Mohabir

IPC分类号： H04N1/40

CPC分类号： H04N1/4052

摘要： A method and system for performing error diffusion are disclosed. An ordered set of pixels, including a pixel intensity value for each pixel, is received. Each pixel intensity value includes a value within a range from a low value to a high value, inclusive. An initial error value is also received. Based on the pixel intensity values and the initial error value, a pixel value for each pixel and an updated error value are computed substantially simultaneously with each other.

摘要翻译： 公开了一种用于执行误差扩散的方法和系统。 接收包括每个像素的像素强度值的有序的像素集合。 每个像素强度值包括从低值到高值的范围内的值（包括端值）。 也接收到初始错误值。 基于像素强度值和初始误差值，基本上彼此同时地计算每个像素的像素值和更新的误差值。

公开(公告)号：US07430064B2

公开(公告)日：2008-09-30

申请号：US11167888

申请日：2005-06-27

申请人： Yingjun Bai ,  Xing Li

发明人： Yingjun Bai ,  Xing Li

IPC分类号： H04N1/405

CPC分类号： H04N1/405 ,  H04N1/4105

摘要： A method and system for rotation-dependent halftone rendering. An image input is received from a scanning system or other source, the received image being either a contone image or an error-diffused mage. If a following right-angle image rotation is to be performed, the image is clustered by a clustering method which yields reduced file sizes with respect to the rotated orientation of the image. If no following right-angle image rotation will be performed, the binary image is clustered by an alternate clustering method which yields reduced file sizes with respect to the non-rotated image. The selective clustering includes dividing the image into a tessellation of cells and then concatenating like bits in each cell in a preferred direction for the rotated or non-rotated image. The clustered image is then rotated if necessary, and compressed.

摘要翻译： 一种用于旋转相关半色调渲染的方法和系统。 从扫描系统或其他源接收图像输入，所接收的图像是连续图像或误差扩散法师。 如果要执行以下直角图像旋转，则通过聚类方法聚集图像，该聚类方法相对于图像的旋转取向产生缩小的文件大小。 如果不执行后续的直角图像旋转，则二进制图像通过替代的聚类方法进行聚类，该方法相对于非旋转图像产生缩小的文件大小。 选择性聚类包括将图像划分为单元格的细分，然后在旋转或未旋转的图像的优选方向上将每个单元格中的像位相连。 如果需要，聚集的图像然后旋转并被压缩。

公开(公告)号：US07406210B2

公开(公告)日：2008-07-29

申请号：US10878693

申请日：2004-06-28

申请人： John C. Handley ,  André Blaakman ,  Anthony Lanza ,  Francis Tse ,  Xing Li ,  Aron Nacman ,  David J. Lieberman

发明人： John C. Handley ,  André Blaakman ,  Anthony Lanza ,  Francis Tse ,  Xing Li ,  Aron Nacman ,  David J. Lieberman

IPC分类号： G06K9/40

CPC分类号： H04N1/40037 ,  H04N1/4092

摘要： The present invention is a method and apparatus for processing image data to accomplish tuning or adjustment of images, so as to modify at least the darkness thereof, using compact, efficient methods and designs.

摘要翻译： 本发明是用于处理图像数据以完成图像调谐或调整的方法和装置，以便使用紧凑，有效的方法和设计来至少修改其暗度。

公开(公告)号：US07251059B2

公开(公告)日：2007-07-31

申请号：US10272866

申请日：2002-10-16

申请人： Xing Li

发明人： Xing Li

IPC分类号： G06K15/00 ,  H04N1/40

CPC分类号： H04N1/40062

摘要： In a system, such as in a digital copier, for classifying image data derived from an original image, the image data is classified by type. An algorithm is applied to the gray levels of pixels surrounding each pixel of interest. The algorithm determines whether a local maximum or minimum is part of an image of closely-spaced lines.

摘要翻译： 在诸如数字复印机的系统中，为了对从原始图像导出的图像数据进行分类，图像数据按类型分类。 将算法应用于围绕每个关注像素的像素的灰度级。 该算法确定局部最大值或最小值是否是紧密间隔线的图像的一部分。

公开(公告)号：US20070172149A1

公开(公告)日：2007-07-26

申请号：US11340391

申请日：2006-01-26

申请人： Clara Cuciurean-Zapan ,  Ramesh Nagarajan ,  Ammal Malik ,  Xing Li

发明人： Clara Cuciurean-Zapan ,  Ramesh Nagarajan ,  Ammal Malik ,  Xing Li

IPC分类号： G06K9/36

CPC分类号： H04N1/3876

摘要： The disclosed systems and methods pertain to the processing of large format images in a manner to avoid introducing imaging defects, and more particularly to dividing the large image into bands, processing these bands in parallel and then putting them back together in to create the final processed image. The methods include the use of overlapping the image bands, padding of the bands prior to processing and the redefinition of image values at common boundaries of the bands to minimize or eliminate visible defects.

摘要翻译： 所公开的系统和方法涉及以避免引入成像缺陷的方式处理大幅面图像，更具体地涉及将大图像分割成频带，并行处理这些频带，然后将它们放在一起以创建最终处理 图片。 这些方法包括使用重叠的图像带，处理之前的频带的填充以及频带的共同边界处的图像值的重新定义以最小化或消除可见的缺陷。

公开(公告)号：US07200285B2

公开(公告)日：2007-04-03

申请号：US10943310

申请日：2004-09-17

申请人： Xing Li ,  Terri A. Clingerman

发明人： Xing Li ,  Terri A. Clingerman

IPC分类号： G06K9/36 ,  H04N1/04 ,  G06K9/20

CPC分类号： H04N1/3873 ,  H04N1/3878

摘要： Detecting skew and determining skew angle using the front of a document by determining background-to-document transitions. Incoming scanlines are interval sampled in the fast scan direction every nth pixel. The samples are collected and organized into a two dimension array comprised of scanline based rows and interval based columns. The collected and organized samples are analyzed by intervals to determine a scanline (row) where a specified sampling condition exceeds predetermined threshold. The corresponding row-interval point forms a background-to-medium transition point of the edge of a document. When two or more background-to-medium transition points are found from different intervals the skew angle can be determined using linear regression.

摘要翻译： 通过确定背景到文档的转换，使用文档的正面检测偏斜和确定偏斜角。 进入的扫描线是每第n个像素在快速扫描方向进行间隔采样。 样本被收集并组织成由基于扫描线的行和基于间隔的列组成的二维阵列。 收集和组织的样本以间隔进行分析，以确定指定采样条件超过预定阈值的扫描线（行）。 相应的行间隔点形成文档边缘的背景到中间的转换点。 当从不同的间隔发现两个或多个背景到中间的转换点时，可以使用线性回归来确定偏斜角。

公开(公告)号：US20060290990A1

公开(公告)日：2006-12-28

申请号：US11167888

申请日：2005-06-27

申请人： Yingjun Bai ,  Xing Li

发明人： Yingjun Bai ,  Xing Li

IPC分类号： G06F15/00

CPC分类号： H04N1/405 ,  H04N1/4105

摘要： A method and system for rotation-dependent halftone rendering. An image input is received from a scanning system or other source, the received image being either a contone image or an error-diffused mage. If a following right-angle image rotation is to be performed, the image is clustered by a clustering method which yields reduced file sizes with respect to the rotated orientation of the image. If no following right-angle image rotation will be performed, the binary image is clustered by an alternate clustering method which yields reduced file sizes with respect to the non-rotated image. The selective clustering includes dividing the image into a tessellation of cells and then concatenating like bits in each cell in a preferred direction for the rotated or non-rotated image. The clustered image is then rotated if necessary, and compressed.

摘要翻译： 一种用于旋转相关半色调渲染的方法和系统。 从扫描系统或其他源接收图像输入，所接收的图像是连续图像或误差扩散法师。 如果要执行以下直角图像旋转，则通过聚类方法聚集图像，该聚类方法相对于图像的旋转取向产生缩小的文件大小。 如果不执行后续的直角图像旋转，则二进制图像通过替代的聚类方法进行聚类，该方法相对于非旋转图像产生缩小的文件大小。 选择性聚类包括将图像划分为单元格的细分，然后在旋转或未旋转的图像的优选方向上将每个单元格中的像位相连。 如果需要，聚集的图像然后旋转并被压缩。

公开(公告)号：US20060245000A1

公开(公告)日：2006-11-02

申请号：US11116894

申请日：2005-04-28

申请人： Yungran Choi ,  Xing Li ,  Daniel Mohabir

发明人： Yungran Choi ,  Xing Li ,  Daniel Mohabir

IPC分类号： H04N1/40

CPC分类号： H04N1/4052

摘要： A method and system for performing error diffusion are disclosed. An ordered set of pixels, including a pixel intensity value for each pixel, is received. Each pixel intensity value includes a value within a range from a low value to a high value, inclusive. An initial error value is also received. Based on the pixel intensity values and the initial error value, a pixel value for each pixel and an updated error value are computed substantially simultaneously with each other.

摘要翻译： 公开了一种用于执行误差扩散的方法和系统。 接收包括每个像素的像素强度值的有序的像素集合。 每个像素强度值包括从低值到高值的范围内的值（包括端值）。 也接收到初始错误值。 基于像素强度值和初始误差值，基本上彼此同时地计算每个像素的像素值和更新的误差值。