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31. 发明申请

US20060269131A1 Apparatus and method for auto windowing using multiple white thresholds 有权
标题翻译：使用多个白色阈值进行自动窗口化的装置和方法
公开(公告)号：US20060269131A1
公开(公告)日：2006-11-30
申请号：US11139541
申请日：2005-05-31
申请人： David Metcalfe , Jeng-Nan Shiau
发明人： David Metcalfe , Jeng-Nan Shiau
IPC分类号： G06K9/34 , G06K9/38
CPC分类号： G06K9/38 , G06K2209/01
摘要： Methods and apparatus for segmenting image data into windows and rendering a best-estimate outline delineating document windows may include adjusting a background white threshold differently than adjusting a white threshold normally used to classify pixels as white for video processing purposes. Such an independently arrived at threshold may be more suitable for the different task of differentiating between document background and document content.
摘要翻译：将图像数据分割成窗口并渲染描绘文档窗口的最佳估计轮廓的方法和装置可以包括调整背景白色阈值，而不是调整通常用于将像素分类为白色的白色阈值用于视频处理目的。这样独立地达到阈值可能更适合区分文档背景和文档内容的不同任务。

32. 发明授权

US06549658B1 Method and system for classifying and processing of pixels of image data 失效
标题翻译：用于图像数据像素分类和处理的方法和系统
公开(公告)号：US06549658B1
公开(公告)日：2003-04-15
申请号：US09010371
申请日：1998-01-21
申请人： Stuart A. Schweid , Jeng-Nan Shiau
发明人： Stuart A. Schweid , Jeng-Nan Shiau
IPC分类号： G06K934
CPC分类号： H04N1/40062 , G06K9/00456
摘要： A system and method classify a pixel of image data as one of a plurality of image types. A first image characteristic value for the pixel, a second image characteristic value for the pixel, a third image characteristic value for the pixel, and a fourth image characteristic for the pixel is determined. Some of these determinations may be resolution dependent. The values from these determination are utilized in assigning an image type classification to the pixel. Moreover, if at least one of the image characteristic values is greater than a predetermined threshold value the pixel is classified as a halftone peak value. The system includes a plurality of microclassifiers for determining a distinct image characteristic value of the pixel; a plurality of macroreduction circuits connected to the plurality of microclassifiers for performing further higher level operations upon the distinct image characteristic values of the pixel to produce reduced values; and a classification circuit to classify the pixel as an image type based on the reduced values from the macroreduction circuits. The system also includes a circuit to detect flat peaks without detecting multiple peaks and a rectangular blur filtering system.
摘要翻译：系统和方法将图像数据的像素分类为多个图像类型之一。确定像素的第一图像特征值，像素的第二图像特征值，像素的第三图像特征值和用于像素的第四图像特性。这些确定中的一些可能取决于分辨率。来自这些确定的值被用于为像素分配图像类型分类。此外，如果图像特征值中的至少一个大于预定阈值，则将像素分类为半色调峰值。该系统包括用于确定像素的不同图像特征值的多个微分类器; 连接到所述多个微分类器的多个宏观还原电路，用于根据所述像素的不同图像特征值进行更高级的操作以产生减小的值; 以及分类电路，用于基于来自大致减小电路的减小值将像素分类为图像类型。该系统还包括用于检测平坦峰而不检测多个峰的电路和矩形模糊滤波系统。

33. 发明授权

US06427030B1 Method and system for image conversion utilizing dynamic error diffusion 失效
标题翻译：利用动态误差扩散进行图像转换的方法和系统
公开(公告)号：US06427030B1
公开(公告)日：2002-07-30
申请号：US08285324
申请日：1994-08-03
申请人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
发明人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
IPC分类号： G06K946
CPC分类号： H04N1/4053
摘要： A method and system implements a dynamic error diffusion process. A grey level value representing a pixel is received. An image segmentation circuit determines an image characteristic of the pixel being processed. A threshold circuit thresholds the grey level value (pixel) and generates an error value as a result of the threshold process. A portion of the error value is diffused to adjacent pixels on a next scanline. The distribution of this error value is dynamic in that different sets of weighting coefficients are used based the image characteristic of the processed pixel. One set of coefficients are utilized in processing a pixel having a first image characteristic, and a second set of coefficients are utilized in processing a pixel having a second image characteristic.
摘要翻译：一种方法和系统实现了动态误差扩散过程。接收表示像素的灰度值。图像分割电路确定正在处理的像素的图像特性。阈值电路对灰度值（像素）进行阈值，并作为阈值处理的结果产生误差值。错误值的一部分扩散到下一个扫描线上的相邻像素。基于经处理的像素的图像特性，使用不同的加权系数集合，该误差值的分布是动态的。一组系数用于处理具有第一图像特性的像素，并且第二组系数被用于处理具有第二图像特性的像素。

34. 发明授权

US5960109A Single pass marker enclosed area detection system and method for a photocopier 失效
标题翻译：单通标记封闭区域检测系统和复印机的方法
公开(公告)号：US5960109A
公开(公告)日：1999-09-28
申请号：US117591
申请日：1993-09-07
申请人： Jeng-Nan Shiau
发明人： Jeng-Nan Shiau
IPC分类号： G03G15/36 , G03G15/01 , G06T1/00 , H04N1/38 , H04N1/387 , H04N1/62 , G06K9/46
CPC分类号： G06K9/2072 , H04N1/38 , H04N1/62 , H04N1/626 , G06K2209/01
摘要： The present invention provides a marker detection and thinning process for a photocopier which is executed during a single scan of a document and does not require a prescan of the document. The system realtime analyzes pixel image data, which is stored in a memory during the scanning process, to detect a marker line of a predetermined color and to thin the marker line. This analysis begins with image data stored in the memory that corresponds to a first pixel. The first pixel is associated with the scanline being presently scanned. It is determined if the image data of the first pixel represents a color that is equivalent to the predetermined color. Marker data is then stored in a buffer at a location corresponding to the first pixel if it is determined that the image data of the first pixel represents a color that is equivalent to a predetermined marker color. The data, stored in the buffer at a second pixel location, is analyzed. The second pixel is associated with a scanline that is prior in time to the scanline of the first pixel. It is determined if the data at the second pixel location is marker data. Also, the data stored in pixel locations adjacent to the second pixel location is analyzed to determine if this data is marker data. The marker data at the second pixel location is eliminated if it is determined, upon examining data of pixel locations adjacent to the second pixel location, that the elimination of this marker data would maintain the connectivity of the marker line. However, the data at the second pixel location is maintained if it is determined that, upon examining the data of pixel locations adjacent to the second pixel location, the elimination of this marker data would cause disconnectivity of the marker line.
摘要翻译：本发明提供了一种用于复印机的标记检测和稀疏处理，其在文档的单次扫描期间执行并且不需要文档的预扫描。系统实时分析在扫描过程中存储在存储器中的像素图像数据，以检测预定颜色的标记线并使标记线变薄。该分析开始于存储在对应于第一像素的存储器中的图像数据。第一像素与当前扫描的扫描线相关联。确定第一像素的图像数据是否表示等于预定颜色的颜色。如果确定第一像素的图像数据表示相当于预定标记颜色的颜色，则将标记数据存储在与第一像素对应的位置处的缓冲器中。分析存储在第二像素位置的缓冲器中的数据。第二像素与先前在第一像素的扫描线之间的扫描线相关联。确定第二像素位置处的数据是否是标记数据。此外，分析存储在与第二像素位置相邻的像素位置中的数据，以确定该数据是否是标记数据。如果在检查与第二像素位置相邻的像素位置的数据时确定消除该标记数据将维持标记线的连接性，则在第二像素位置处的标记数据被消除。然而，如果确定在检查与第二像素位置相邻的像素位置的数据时，消除该标记数据将导致标记线的断开连接，则维持第二像素位置处的数据。

35. 发明授权

US5787206A Method and system for processing image information using expanded dynamic screening and error diffusion 失效
标题翻译：使用扩展动态筛选和误差扩散处理图像信息的方法和系统
公开(公告)号：US5787206A
公开(公告)日：1998-07-28
申请号：US655422
申请日：1996-05-30
申请人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
发明人： Leon C. Williams , Jeng-Nan Shiau , David J. Metcalfe
IPC分类号： B41J2/52 , G06T5/00 , H04N1/405
CPC分类号： H04N1/4053
摘要： A printing system for rendering marks on a recording medium receives a multi-level grey scale pixel value representing a pixel having a first resolution. A screening circuit generates a screened multi-level grey scale pixel value equal to (G.sub.L -V.sub.i)+(S.sub.i -Th)*Dmp.sub.vi *Mod.sub.Eff wherein G.sub.L is the maximum grey level value of the pixel, V.sub.i is equal to the multi-level grey scale pixel value of the first resolution, S.sub.i is equal to a screen value corresponding to a position of the pixel, Th is the threshold value, Dmp.sub.vi is a video dependent dampening factor, and Mod.sub.Eff is a modulation multiplication factor. An interpolator converts the screened multi-level grey scale pixel value to a second resolution, the second resolution being higher than the first resolution, and a binarization circuit binarizes the converted multi-level grey scale pixel value so as to output a binary signal and an error value, the error value having a resolution equal to the first resolution. The error value is diffused to multi-level grey scale pixel values corresponding to pixels adjacent to the pixel having the first resolution, and the binary signal is converted into a mark on the recording medium.
摘要翻译：用于在记录介质上渲染标记的打印系统接收表示具有第一分辨率的像素的多级灰度像素值。筛选电路产生等于（GL-Vi）+（Si-Th）* Dmpvi * ModEff的屏蔽多级灰度像素值，其中GL是像素的最大灰度级值，Vi等于多级第一分辨率的灰阶像素值，Si等于与像素的位置对应的屏幕值，Th是阈值，Dmpvi是视频相关的衰减因子，ModEff是调制倍增因子。内插器将所筛选的多级灰阶像素值转换为第二分辨率，第二分辨率高于第一分辨率，二值化电路对转换后的多级灰阶像素值进行二值化处理，以输出二进制信号和误差值，误差值具有等于第一分辨率的分辨率。误差值扩散到与具有第一分辨率的像素相邻的像素对应的多级灰度像素值，并且二进制信号被转换成记录介质上的标记。

36. 发明授权

US5553171A Apparatus and method for arbitrary binary resolution conversion 失效
标题翻译：用于任意二进制分辨率转换的装置和方法
公开(公告)号：US5553171A
公开(公告)日：1996-09-03
申请号：US507064
申请日：1995-07-26
申请人： Ying-wei Lin , Jeng-Nan Shiau
发明人： Ying-wei Lin , Jeng-Nan Shiau
IPC分类号： H04N1/387 , G06T3/40 , G06T5/20 , H04N1/40 , G06K9/36
CPC分类号： G06T3/4007 , H04N1/40068
摘要： A method of arbitrary image resolution conversion takes an original print ready image at a first resolution and orientation and simulates printing of that image by creating a representation of a page at a particular resolution and orientation using a suitable spot model for the reconstruction function. The image is then filtered with a low pass filter and sampled with an aperture that corresponds to the desired output. The image data, which may be definable at several bits per pixel, is then made print-ready by reducing the number of bits defining each pixel to a valid output state. The reduction step is accomplished through error diffusion methods that maintain the local area gray density level. The filtering step reduces moire in the converted image.
摘要翻译：任意图像分辨率转换的方法以第一分辨率和方向获取原始打印准备好的图像，并且通过使用用于重建功能的合适的斑点模型以特定分辨率和取向创建页面的表示来模拟该图像的打印。然后用低通滤波器过滤图像，并用对应于期望输出的孔进行采样。然后，可以通过将每个像素的几个比特定义的图像数据通过将定义每个像素的比特数减少到有效输出状态来进行打印准备。还原步骤通过维持局部区域灰度密度水平的误差扩散方法来实现。过滤步骤减少转换图像中的莫尔条纹。

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