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公开(公告)号：US06608701B1
公开(公告)日：2003-08-19
申请号：US09348378
申请日：1999-07-07
申请人： Robert P. Loce , Michael Branciforte , Fritz F. Ebner , Douglas N. Curry , Yeqing Zhang , Leon C. Williams
发明人： Robert P. Loce , Michael Branciforte , Fritz F. Ebner , Douglas N. Curry , Yeqing Zhang , Leon C. Williams
IPC分类号： G06K936
CPC分类号： H04N1/4052 , H04N1/4056
摘要： A compact rendering processor for processing image data including a multi-bit halftone region generates high addressability pixels. The compact rendering processor includes a tagging sub-processor operating on the image data to identify a target pixel and a neighboring pixel to determine a fill-order. The compact rendering processor also includes a rendering sub-processor that converts the target pixel into a high addressability pixel based upon the fill-order. Optionally, a diffusion sub-processor can be included to diffuse an error resulting from the conversion of the target pixel into a high addressability pixel to other pixels within the image data.
摘要翻译： 用于处理包括多位半色调区域的图像数据的紧凑渲染处理器产生高可寻址性像素。 紧凑渲染处理器包括对图像数据进行操作的标记子处理器，以识别目标像素和相邻像素以确定填充顺序。 紧凑渲染处理器还包括渲染子处理器，其基于填充顺序将目标像素转换为高可寻址性像素。 可选地，可以包括扩散子处理器以将由目标像素转换成高可寻址性像素所产生的误差扩散到图像数据内的其他像素。
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公开(公告)号：US06683702B1
公开(公告)日：2004-01-27
申请号：US09348398
申请日：1999-07-07
IPC分类号： G06K936
CPC分类号： H04N1/40075 , H04N1/4056
摘要： A method of reproducing a document including halftoned regions therein scans the document to generate scanned image data comprising a digitized representation of said document. The scanned image data that corresponds to the halftoned regions is then rendered using a compact rendering process that includes positioning an observation window about a target pixel and a neighboring pixel; selecting a fill-order based upon a result of the analyzing step; and generating a high addressability pixel as a function of the selected fill-order.
摘要翻译： 再现包括其中的半色调区域的文档的方法扫描文档以生成包括所述文档的数字化表示的扫描图像数据。 然后使用包括定位关于目标像素和相邻像素的观察窗的紧凑渲染过程来渲染与半色调区域对应的扫描图像数据; 基于分析步骤的结果选择填充顺序; 以及根据所选择的填充顺序生成高可寻址性像素。
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公开(公告)号：US06449396B1
公开(公告)日：2002-09-10
申请号：US09348871
申请日：1999-07-07
IPC分类号： G06K936
CPC分类号： H04N1/4056 , H04N1/40075
摘要： A method of processing a high addressability binary image comprises converting the high addressability binary image to gray-scale image data; manipulating the gray-scale image data; and rendering the manipulated gray-scale image to a high addressability format using a compact rendering process.
摘要翻译： 一种处理高可寻址性二值图像的方法包括将高可寻址性二进制图像转换为灰度图像数据; 操纵灰度图像数据; 并使用紧凑的渲染过程将操纵的灰度图像呈现为高寻址能力格式。
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公开(公告)号：US06678414B1
公开(公告)日：2004-01-13
申请号：US09505875
申请日：2000-02-17
IPC分类号： G06T700
CPC分类号： H04N1/40075 , G06K9/4609 , G06K9/56
摘要： An apparatus and method of template fitting for fitting a plurality of templates in correspondence with a gray-scale image, including receiving gray-scale image information of an observed image; defining a window of the gray-scale image information so as to enable a loose-gray-scale fit between the defined window and the plurality of templates; extracting a plurality of pixels of the image information and using the window to which to fit at least one of the plurality of templates. Further, fitting one of the plurality of templates to the defined window within a threshold looseness interval associated with the template wherein a looseness interval between the window of image data and the template is less than the threshold looseness interval.
摘要翻译： 一种用于与灰度图像相对应地装配多个模板的模板拟合装置和方法，包括接收观察图像的灰度图像信息; 定义灰度图像信息的窗口，以便能够在所定义的窗口和多个模板之间进行松散灰度拟合; 提取所述图像信息的多个像素并使用与所述多个模板中的至少一个模拟的所述窗口。 此外，在与模板相关联的阈值松动间隔内将多个模板中的一个拟合到定义的窗口，其中图像数据的窗口与模板之间的松动间隔小于阈值松动间隔。
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5.发明授权Platen cover for a digital document scanner with electrically switchable reflectance modes 失效用于具有电气可切换反射模式的数字文档扫描仪的压板盖
公开(公告)号：US5790211A
公开(公告)日：1998-08-04
申请号：US525884
申请日：1995-09-08
申请人： Ned J. Seachman , Leon C. Williams
发明人： Ned J. Seachman , Leon C. Williams
CPC分类号： H04N1/00795 , H04N2201/0422
摘要： A system and method digitally scans a document using a high reflectance mode and a low reflectance mode. Initially, a platen cover provides a low reflectance background around the document and the scanner scans the low reflectance background and document to determine an edge of the document or to retrieve other image characteristics of the document. Subsequently, the platen cover changes so as to provide a high reflectance background around the document. The scanner then scans the high reflectance background and the document and produces digital image data relating to an image on the document.
摘要翻译： 系统和方法使用高反射率模式和低反射率模式对文档进行数字扫描。 最初，压板盖在文件周围提供低反射率背景，并且扫描仪扫描低反射率背景和文档以确定文档的边缘或检索文档的其他图像特征。 随后，压板盖改变，以便在文件周围提供高反射率背景。 然后，扫描仪扫描高反射率背景和文档，并产生与文档上的图像有关的数字图像数据。
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公开(公告)号：US5729663A
公开(公告)日：1998-03-17
申请号：US569036
申请日：1995-12-07
申请人： Ying-wei Lin , Leon C. Williams
发明人： Ying-wei Lin , Leon C. Williams
CPC分类号： H04N1/40087
摘要： The present invention is a method and apparatus for generating N-bit per pixel output signals in response to M-bit per pixel image input signals, where M is greater than N. The invention employs a halftone cell threshold memory that stores a single threshold for each cell element. During real-time processing of the video image signals, multiple thresholds are calculated based upon the stored thresholds, and the image signals are compared to the thresholds. The threshold calculation process is simplified by using equally spaced constants and any desired variation from the resulting equally spaced thresholds is accomplished through a remapping of the video image signals using a look-up table. The output of the plurality of comparisons carried out for each halftone cell element is then encoded to produce a digital gray-scale output signal.
摘要翻译： 本发明是一种用于响应于M位每像素图像输入信号产生N位每像素输出信号的方法和装置，其中M大于N.本发明采用半色调单元阈值存储器，其存储单个阈值 每个单元格元素。 在视频图像信号的实时处理期间，基于存储的阈值计算多个阈值，并将图像信号与阈值进行比较。 通过使用等间隔的常数来简化阈值计算过程，并且通过使用查找表重新映射视频图像信号来实现来自所得等间隔的阈值的任何期望的变化。 然后对每个半色调单元元素执行的多个比较的输出被编码以产生数字灰度输出信号。
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7.发明授权System and method for redistributing error values from an error diffusion process 失效从误差扩散过程重新分配误差值的系统和方法
公开(公告)号：US5696601A
公开(公告)日：1997-12-09
申请号：US285265
申请日：1994-08-03
CPC分类号： H04N1/4052
摘要： A method and system implements a redistributive characteristic into an error diffusion process. A grey level value representing a pixel is received. A threshold circuit thresholds the received grey level value and generates an error value as a result of the threshold. A portion of the error value is diffused to adjacent pixels on a next scanline. All the error for a single pixel on the next scanline is accumulated. Since this accumulated error has a greater number of bits than can be stored in a buffer, a portion of the accumulated error is truncated and redistributed to a down stream pixel for inclusion in the downstream pixel's error accumulation process. The grey level value has a first resolution which corresponds to an original input resolution. In a high addressabilty environment, the received grey level value is interpolated to subpixel grey level values before thresholding.
摘要翻译： 一种方法和系统在误差扩散过程中实现再分配特性。 接收表示像素的灰度值。 阈值电路对接收的灰度级值进行阈值，并作为阈值的结果生成错误值。 错误值的一部分扩散到下一个扫描线上的相邻像素。 累积下一个扫描线上单个像素的所有错误。 由于该累加误差具有比可以存储在缓冲器中更多的位数，所以累积误差的一部分被截断并重新分配给下行像素以包括在下游像素的误差累加处理中。 灰度值具有对应于原始输入分辨率的第一分辨率。 在高可寻址环境中，接收到的灰度值被内插到阈值处理之前的子像素灰度值。
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公开(公告)号：US5390029A
公开(公告)日：1995-02-14
申请号：US185075
申请日：1994-01-24
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。
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9.发明授权High addressability image generator using pseudo interpolation of video and screen data 失效高可寻址性图像发生器使用视频和屏幕数据的伪插值
公开(公告)号：US5274472A
公开(公告)日：1993-12-28
申请号：US887972
申请日：1992-05-21
申请人： Leon C. Williams
发明人： Leon C. Williams
CPC分类号： H04N1/4056 , G06T3/4007
摘要： There is provided a method to convert gray level image data from image input terminals, into binary data for high-addressability image output terminals. High addressability output terminals such as printers increase their virtual resolution in the fast scan direction in order to achieve a higher effective printing resolution. For example, one pixel in the slow scan direction divided into eight pixels in the fast scan direction, improves a printer's actual resolution from n spots.times.m spots per unit area to (8 * n) spots.times.m spots per unit area. Gray level input data representing pixel data from image input terminals such as scanners is encoded by either an analog signal or a quantized digital signal with a large number of levels (e.g. 256 levels). Binary output data has pixels with either a value of one or zero or a much smaller number of gray levels compared to digital input signals.
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公开(公告)号：US5237432A
公开(公告)日：1993-08-17
申请号：US812334
申请日：1991-12-23
CPC分类号： G06T3/4007 , G06T3/60
摘要： An image processing system for altering the size of an image represented by a plurality of input video signals including a controller for producing a scale factor and a scale factor valid signal. The controller also includes a padder which is used to increase the accuracy of the scale factor during the operation of the controller. The signals generated by the controller are passed to an interpolator suitable for producing an output signal as a function of one or more of the input video signals in response to the scale factor and scale factor valid signal.
摘要翻译： 一种用于改变由多个输入视频信号表示的图像的尺寸的图像处理系统，包括用于产生比例因子的控制器和比例因子有效信号。 控制器还包括一个焊盘，用于在控制器的操作期间提高比例因子的精度。 由控制器产生的信号被传送到适于根据比例因子和比例因子有效信号产生作为一个或多个输入视频信号的函数的输出信号的内插器。
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