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1. 发明授权

US06175650B1 Adaptive quantization compatible with the JPEG baseline sequential mode 失效
标题翻译：与JPEG基线顺序模式兼容的自适应量化
公开(公告)号：US06175650B1
公开(公告)日：2001-01-16
申请号：US09013480
申请日：1998-01-26
申请人： Pradeep S. Sindhu , Jean-Marc Frailong , Donald J. Curry , Asghar Nafarieh , Doron Kletter
发明人： Pradeep S. Sindhu , Jean-Marc Frailong , Donald J. Curry , Asghar Nafarieh , Doron Kletter
IPC分类号： G06K900
CPC分类号： G06T9/005
摘要： Pixel blocks of an input image are type classified based on an analysis of the secord differences between the values of neighboring pixels in the rows and columns of each pixel block. A histogram of these second order differences may be employed to refine this analysis
摘要翻译：基于对每个像素块的行和列中的相邻像素的值之间的秒差的分析，输入图像的像素块是类型分类的。可以使用这些二阶差分的直方图来改进该分析

2. 发明授权

US07456982B2 Segmentation method and system for multiple raster content (MRC) representation of documents 有权
标题翻译：用于多个光栅内容（MRC）表示文档的分割方法和系统
公开(公告)号：US07456982B2
公开(公告)日：2008-11-25
申请号：US10612368
申请日：2003-07-01
申请人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
发明人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
IPC分类号： G06K9/34 , H04N1/41 , H04N1/64 , G06T7/00
CPC分类号： G06K9/00456 , G06K9/38 , G06K2209/01 , H04N1/40062
摘要： A method and a system for dynamically thresholding an image signal. The system comprises a computing block. The computing block receives the image signal and a minimum and a maximum within each of a set of windows centered on the current pixel in the image signal, and computes, for each of the windows, based on the current pixel and the respective minimum and maximum, a respective indicator representing the distance and direction of the current pixel relative to a respective threshold plane, and outputs a control signal based on the indicators.
摘要翻译：一种用于动态阈值化图像信号的方法和系统。该系统包括计算块。计算块在图像信号中以当前像素为中心的一组窗口的每一个的每一个中接收图像信号，并且接收最小和最大值，并且基于当前像素和相应的最小和最大值来计算每个窗口，表示当前像素相对于相应阈值平面的距离和方向的相应指示符，并且基于指示符输出控制信号。

3. 发明授权

US07365882B2 Halftone screen frequency and magnitude estimation for digital descreening of documents 有权
标题翻译：半色调屏幕频率和幅度估计用于文件的数字去网
公开(公告)号：US07365882B2
公开(公告)日：2008-04-29
申请号：US10776612
申请日：2004-02-12
申请人： Donald J. Curry , Asghar Nafarieh , Doron Kletter
发明人： Donald J. Curry , Asghar Nafarieh , Doron Kletter
IPC分类号： H04N1/405
CPC分类号： H04N1/40075
摘要： A highly efficient method and system for eliminating halftone screens from scanned documents while preserving the quality and sharpness of text and line-art is disclosed. The method and system utilizes a single channel screen frequency estimator module, which generates a screen frequency estimate for image data. The module generates a signal based on the highly filtered image signal at low contrast levels, and based on a reliable estimate to the halftone frequency at higher contrast levels. The single channel screen estimate module has adequate performance in resolution ranges from 300 to 600 dpi.
摘要翻译：公开了一种用于从扫描文档中消除半色调屏幕的高效方法和系统，同时保持文本和线条的质量和清晰度。该方法和系统利用单通道屏幕频率估计模块，其生成图像数据的屏幕频率估计。该模块基于低对比度下的高度滤波的图像信号产生信号，并且基于对较高对比度下的半色调频率的可靠估计。单通道屏幕估算模块在300至600 dpi的分辨率范围内具有足够的性能。

4. 发明授权

US07356183B2 Segmentation method and system for multiple raster content (MRC) representation of documents 有权
标题翻译：用于多个光栅内容（MRC）表示文档的分割方法和系统
公开(公告)号：US07356183B2
公开(公告)日：2008-04-08
申请号：US10612248
申请日：2003-07-01
申请人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
发明人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
IPC分类号： G06K9/34 , G06K9/36
CPC分类号： G06K9/00456 , H04N1/40062
摘要： A method and a system for separating an image signal into a set of image planes in accordance with a control signal. The system comprises a selector module, an edge processing module and a foreground/background separation module. The selector module receives the control signal and produces a selector signal. The edge processing module receives the selector signal and produces a decision signal. The foreground/background separation module receives the image signal and the decision signal, and outputs a foreground signal and a background signal, a representation of the current pixel of the image signal being included in at least one of the foreground signal and the background.
摘要翻译：根据控制信号将图像信号分离为一组图像平面的方法和系统。该系统包括选择器模块，边缘处理模块和前景/背景分离模块。选择器模块接收控制信号并产生选择信号。边缘处理模块接收选择器信号并产生判定信号。前景/背景分离模块接收图像信号和判定信号，并输出前景信号和背景信号，图像信号的当前像素的表示被包括在前景信号和背景中的至少一个中。

5. 发明授权

US07236641B2 Page background detection and neutrality on scanned documents 有权
标题翻译：扫描文档上的页面背景检测和中立性
公开(公告)号：US07236641B2
公开(公告)日：2007-06-26
申请号：US10612234
申请日：2003-07-01
申请人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
发明人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
IPC分类号： G06K9/40 , G06K9/34 , G06K9/00
CPC分类号： H04N1/56 , G06T5/001 , G06T2207/10008 , G06T2207/10024 , G06T2207/20008 , G06T2207/30176
摘要： A Statistics Module (STS) is disclosed for collecting essential statistics about an image content for the purpose of applying various image enhancement operations such as page background removal and automatic neutral detection to determine if the page is gray or colored. The Statistics Module uses the blurred signal BLR from a De-Screen Module in order to eliminate some of the scanner noise. The output is a special 3D color histogram array.
摘要翻译：公开了统计模块（STS），用于收集关于图像内容的基本统计数据，以便应用各种图像增强操作，例如页面背景去除和自动中性线检测，以确定页面是灰色还是彩色。统计模块使用去屏模块的模糊信号BLR，以消除一些扫描仪噪声。输出是一个特殊的3D颜色直方图数组。

6. 发明授权

US07324120B2 Segmentation method and system for scanned documents 有权
标题翻译：扫描文档的分割方法和系统
公开(公告)号：US07324120B2
公开(公告)日：2008-01-29
申请号：US10776516
申请日：2004-02-12
申请人： Donald J. Curry , Asghar Nafarieh , Doron Kletter
发明人： Donald J. Curry , Asghar Nafarieh , Doron Kletter
IPC分类号： G06T11/00
CPC分类号： G06K9/00456 , G06K9/38 , G06K2209/01 , G06T7/11 , G06T7/12 , G06T7/194 , G06T2207/10008 , G06T2207/20012 , G06T2207/20192 , G06T2207/30176 , H04N1/40062
摘要： Methods and systems include a dependent min-max module the receives image data and generates a dependent Min value and a dependent Max value within a window around a pixel of interest. A dynamic threshold module, based on the dependent Min and Max values, generates continuity data and enhanced data suitable for identifying, for example, blobs.
摘要翻译：方法和系统包括依赖的最小 - 最大模块，其接收图像数据，并在感兴趣的像素周围的窗口内生成依赖的最小值和依赖的最大值。动态阈值模块基于相关的最小值和最大值，生成适用于识别例如斑点的连续性数据和增强数据。

7. 发明授权

US07269294B2 Foreground erosion method and system for Multiple Raster Content (MRC) representation of documents 有权
标题翻译：多光栅内容（MRC）表示文件的前景侵蚀方法和系统
公开(公告)号：US07269294B2
公开(公告)日：2007-09-11
申请号：US10612063
申请日：2003-07-01
申请人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
发明人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
IPC分类号： G06K9/42 , G06K9/44 , G06K9/56 , G06K9/60
CPC分类号： G06K9/00456 , G06T5/002 , G06T5/30 , G06T7/194 , G06T2207/10008 , G06T2207/30176 , H04N1/40062
摘要： A foreground erosion method is used to meet thin (but unbroken) text requirements using linear YCC segmentation. The method uses a fixed value subtracted from a gray selector signal, thereby thinning/eroding the foreground. In cases where the pixel would be converted from foreground to background, this is only done if a neighborhood test verifies that the thinning won't result in broken lines. The foreground erosion method attempts to match a couple of templates wherein if a match is found, then the adjustment is performed.
摘要翻译：使用前景侵蚀法来满足使用线性YCC分割的薄（但不间断）文本需求。该方法使用从灰度选择器信号中减去的固定值，从而使前景变薄/侵蚀。在像素将从前景转换为背景的情况下，只有在邻域测试验证稀疏不会导致虚线的情况下才会进行。前景侵蚀方法尝试匹配几个模板，其中如果找到匹配，则执行调整。

8. 发明授权

US07227988B2 Prioritized PDL segmentation producing two bit selector 有权
标题翻译：优先PDL分段产生两位选择器
公开(公告)号：US07227988B2
公开(公告)日：2007-06-05
申请号：US10612057
申请日：2003-07-01
申请人： Donald J. Curry , Fritz F. Ebner , Doron Kletter , Asghar Nafarieh
发明人： Donald J. Curry , Fritz F. Ebner , Doron Kletter , Asghar Nafarieh
IPC分类号： G06K9/00 , G06K9/34 , G06K9/36 , H04N1/38 , H04N1/40
CPC分类号： H04N1/41 , G06K9/00456 , G06T9/20 , H04N1/40062 , H04N1/642 , H04N19/12 , H04N19/14 , H04N19/17 , H04N19/176 , H04N19/20 , H04N19/80 , H04N19/85 , H04N19/86
摘要： A method of generating a binary Sel plane for image compression is disclosed. The method first generates a 2 bit gray selector (GraySel). This 2 bit selector is then processed in a second stage to produce a binary Sel decision which minimizes the compression noise evident in the reconstructed image. The method used here to generate the 2 bit GraySel applies a set of prioritized rules over a small 3×3 window that is well suited for segmenting synthetic, PDL generated images that are typically free of scanner noise. The method not only marks the proper sense of the selector when it is known, but also include a 3rd state that indicates that the selector decision is weak or unknown. This weak decision can then be optimized in the second stage process based on strong edges information in the neighborhood.
摘要翻译：公开了一种生成用于图像压缩的二进制Sel平面的方法。该方法首先生成一个2位灰色选择器（GraySel）。然后，该2位选择器在第二级中被处理以产生使得在重构图像中显而易见的压缩噪声最小化的二进制Sel判定。这里用于生成2位GraySel的方法在一个小的3x3窗口上应用一组优先级规则，非常适合分割通常没有扫描仪噪声的合成PDL生成的图像。该方法在已知时不仅标示选择器的适当感觉，而且还包括指示选择器判定为弱或未知的3“状态”。然后可以在基于邻域中的强边缘信息的第二阶段过程中优化该弱决策。

9. 发明授权

US07218418B2 Digital de-screening of documents 失效
标题翻译：数字去筛选文件
公开(公告)号：US07218418B2
公开(公告)日：2007-05-15
申请号：US10187499
申请日：2002-07-01
申请人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
发明人： Donald J. Curry , Doron Kletter , Asghar Nafarieh
IPC分类号： H04N1/405 , G06K9/40
CPC分类号： H04N1/40075
摘要： A method and a system for de-screening an image signal. The system comprises a filter bank, a control module and a blend module. The filter bank filters the image signal and produces a set of filter output signals. The control module generates at least one control signal based on the image signal and some of the filter output signals. The blend module dynamically blends the filter output signals in accordance with the control signal to produce a de-screened output signal.
摘要翻译：一种用于去除图像信号的方法和系统。该系统包括过滤器组，控制模块和混合模块。滤波器组滤除图像信号并产生一组滤波器输出信号。控制模块基于图像信号和一些滤波器输出信号产生至少一个控制信号。混合模块根据控制信号动态地混合滤波器输出信号以产生去屏蔽的输出信号。

10. 发明授权

US07532363B2 Apparatus and methods for de-screening scanned documents 失效
标题翻译：扫描文件的扫描装置和方法
公开(公告)号：US07532363B2
公开(公告)日：2009-05-12
申请号：US10776508
申请日：2004-02-12
申请人： Donald J. Curry , Asghar Nafarieh , Doron Kletter
发明人： Donald J. Curry , Asghar Nafarieh , Doron Kletter
IPC分类号： G06K15/00 , H04N1/405
CPC分类号： H04N1/40075 , G06T5/003 , H04N1/4092
摘要： Apparatus and methods for de-screening an image signal utilizing a bank of filters to provide several increasingly blurred versions of the original image signal is disclosed. At any given time, one or more of the blurred versions are created, on a pixel-by-pixel basis. The outputs from a selected pair of blurred signals are then blended together to create a variable blending output that can vary smoothly from no blurring to maximum blurring in a smooth and continuous manner. In addition, the apparatus and methods provide enhanced text and line art by using a variable un-sharp masking mechanism with independent post-blur sharpening control, and detect and enhance neutral (no-color) output pixels.
摘要翻译：公开了一种使用一组滤波器去除屏幕图像信号以提供原始图像信号的几个日益模糊的版本的设备和方法。在任何给定的时间，一个或多个模糊版本是逐个像素地创建的。然后将所选择的一对模糊信号的输出混合在一起，以创建可以以平滑和连续的方式从无模糊到最大模糊的平滑变化的可变混合输出。此外，该装置和方法通过使用具有独立的模糊后锐化控制的可变的非锐利掩蔽机制来提供增强的文本和线条艺术，并且检测和增强中性（无彩色）输出像素。

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