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1. 发明授权

US07515732B2 Method of embedding color information in printed documents using watermarking 失效
标题翻译：使用水印嵌入打印文档中的颜色信息的方法
公开(公告)号：US07515732B2
公开(公告)日：2009-04-07
申请号：US11034131
申请日：2005-01-12
申请人： Zhigang Fan , Shen-ge Wang , Hui Cheng
发明人： Zhigang Fan , Shen-ge Wang , Hui Cheng
IPC分类号： G06K9/00 , G06K9/46 , G06K9/40
CPC分类号： H04N1/32309 , G06T1/0021 , G06T2201/0601 , H04N1/32144 , H04N1/32341 , H04N1/6033 , H04N2201/0081 , H04N2201/3242 , H04N2201/3271 , H04N2201/3283
摘要： A method for enhancing color fidelity in multi-reproduction, includes scanning an image to be reproduced, wherein the image contains an invisible digital watermark including color information; decoding the color information contained in the watermark; comparing the decoded color information with the scanned image; generating a correction table from the differences between the decoded color information and the scanned image; and performing color correction on the scanned image using the correction table. This method confines the color error to one generation, even when copies go through multiple reproduction.
摘要翻译：一种用于增强多重再现中的色彩保真度的方法，包括扫描要再现的图像，其中图像包含包含颜色信息的不可见数字水印; 对包含在水印中的颜色信息进行解码; 将解码的颜色信息与扫描图像进行比较; 从解码的颜色信息和扫描图像之间的差异产生校正表; 并使用校正表对扫描图像执行颜色校正。这种方法将颜色误差限制在一代，即使拷贝经过多重再现。

2. 发明授权

US06973213B2 Background-based image segmentation 有权
标题翻译：基于背景的图像分割
公开(公告)号：US06973213B2
公开(公告)日：2005-12-06
申请号：US09977186
申请日：2001-10-12
申请人： Zhigang Fan , Hui Cheng
发明人： Zhigang Fan , Hui Cheng
IPC分类号： G06T11/60 , G06T5/00 , G06T7/40 , H04N1/387 , G06K9/34
CPC分类号： G06K9/00463 , G06K9/00456 , G06T7/11 , G06T7/155 , G06T7/187 , G06T2207/10008 , G06T2207/20156 , G06T2207/30176
摘要： A method for segmenting an image using a background-based segmentation process is provided. A document image (102) is low-pass filtered and decimated. The decimated image is processed at low resolution by a low-resolution segmentation (104) stage. Segmentation results include identification of a main background and one or more objects. Objects that cannot be classified in text or picture classes are further segmented into a local background and smaller objects. This process is reiterated until all objects are classified in text or picture classes. The results are overlaid on the image (102) during an original-resolution refinement (106) stage to refine the segmentation.
摘要翻译：提供了一种使用基于背景的分割过程来分割图像的方法。文档图像（102）被低通滤波和抽取。抽取的图像通过低分辨率分割（104）阶段以低分辨率处理。分割结果包括识别主背景和一个或多个对象。不能分类为文本或图片类的对象进一步分割为本地背景和较小对象。重复此过程，直到所有对象分类为文本或图片类。在原始分辨率细化（106）阶段期间，将结果覆盖在图像（102）上，以细化分割。

3. 发明授权

US06983068B2 Picture/graphics classification system and method 失效
标题翻译：图片/图形分类系统和方法
公开(公告)号：US06983068B2
公开(公告)日：2006-01-03
申请号：US09965922
申请日：2001-09-28
申请人： Salil Prabhakar , Hui Cheng , Zhigang Fan , John C. Handley , Ying-wei Lin
发明人： Salil Prabhakar , Hui Cheng , Zhigang Fan , John C. Handley , Ying-wei Lin
IPC分类号： G06K9/00
CPC分类号： G06K9/00456
摘要： A method and system for image processing, in conjunction with classification of images between natural pictures and synthetic graphics, using SGLD texture (e.g., variance, bias, skewness, and fitness), color discreteness (e.g., R—L, R—U, and R—V normalized histograms), or edge features (e.g., pixels per detected edge, horizontal edges, and vertical edges) is provided. In another embodiment, a picture/graphics classifier using combinations of SGLD texture, color discreteness, and edge features is provided. In still another embodiment, a “soft” image classifier using combinations of two (2) or more SGLD texture, color discreteness, and edge features is provided. The “soft” classifier uses image features to classify areas of an input image in picture, graphics, or fuzzy classes.
摘要翻译：一种用于图像处理的方法和系统，结合使用SGLD纹理（例如，方差，偏差，偏度和适应度）的自然图像和合成图像之间的图像分类，颜色离散性（例如，R SUB 提供了一个或多个边缘特征（例如每个检测到的边缘，水平边缘和垂直边缘的像素）。在另一个实施例中，提供了使用SGLD纹理，颜色离散性和边缘特征的组合的图片/图形分类器。在另一个实施例中，提供了使用两（2）或更多SGLD纹理，颜色离散性和边缘特征的组合的“软”图像分类器。 “软”分类器使用图像特征来对图像，图形或模糊类中的输入图像的区域进行分类。

4. 发明授权

US06956958B2 Method of embedding color information in printed documents using watermarking 失效
公开(公告)号：US06956958B2
公开(公告)日：2005-10-18
申请号：US10082535
申请日：2002-02-21
申请人： Zhigang Fan , Shen-ge Wang , Hui Cheng
发明人： Zhigang Fan , Shen-ge Wang , Hui Cheng
IPC分类号： H04N1/387 , G06T1/00 , H04N1/32 , H04N1/46 , H04N1/60 , G06K9/00
CPC分类号： H04N1/32309 , G06T1/0021 , G06T2201/0601 , H04N1/32144 , H04N1/32341 , H04N1/6033 , H04N2201/0081 , H04N2201/3242 , H04N2201/3271 , H04N2201/3283
摘要： A method for enhancing color fidelity in multi-reproduction, includes scanning an image to be reproduced, wherein the image contains an invisible digital watermark including color information; decoding the color information contained in the watermark; comparing the decoded color information with the scanned image; generating a correction table from the differences between the decoded color information and the scanned image; and performing color correction on the scanned image using the correction table. This method confines the color error to one generation, even when copies go through multiple reproduction.

5. 发明授权

US07006256B2 Watermarked image generator and method of embedding watermarks into an input image 失效
公开(公告)号：US07006256B2
公开(公告)日：2006-02-28
申请号：US09683540
申请日：2002-01-16
申请人： Shen-ge Wang , Hui Cheng , Zhigang Fan , Ying-wei Lin
发明人： Shen-ge Wang , Hui Cheng , Zhigang Fan , Ying-wei Lin
IPC分类号： H04N1/46
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0061 , H04N1/32203 , H04N1/32208 , H04N1/32256 , H04N2201/3233 , H04N2201/327
摘要： A watermarked image generator includes a watermark data source that inputs watermark data to a watermark embedding device. The watermark embedding device halftones the input image to generate the output image made of 2×2 binary patterns, the 2×2 binary patterns forming the watermarks embedded in the output image. The watermark embedding device includes a tri-level error diffusion generator that performs tri-level error diffusion on the input image by halftoning the input image into black, white and 50% gray. A plurality of halftoning circuits successively replace each pixel of the halftoned input image with one of a plurality of the 2×2 binary patterns. The one of the plurality of 2×2 binary patterns corresponds to at least one respective bit of the watermark data when a pixel of the halftoned image data is 50% gray. The watermark data can be segmentation map data of the input image.

6. 发明授权

US06954541B2 Method of detecting changes occurring in image editing using watermarks 失效
标题翻译：使用水印检测图像编辑中出现的变化的方法
公开(公告)号：US06954541B2
公开(公告)日：2005-10-11
申请号：US10158027
申请日：2002-05-29
申请人： Zhigang Fan , Hui Cheng , Robert J. Rolleston
发明人： Zhigang Fan , Hui Cheng , Robert J. Rolleston
IPC分类号： G06T1/00 , G11B20/00 , H04N1/32 , G06K9/00
CPC分类号： G06T1/0071 , G06T2201/0051 , G06T2201/0061 , G11B20/00086 , H04N1/00005 , H04N1/00037 , H04N1/32144 , H04N1/32213 , H04N1/32251 , H04N1/32267 , H04N1/32288 , H04N1/32299 , H04N1/32304 , H04N1/32309 , H04N2201/3242 , H04N2201/328
摘要： A method of editing a digital image having associated embedded data, such as printing hints, includes embedding a first watermark in the original image before the image is edited. The first watermarking scheme associates first watermark information with each pixel and is used to detect which pixels have been edited. A second watermark may be embedded in the original image according to a second watermarking scheme which associates second watermark information with non-overlapping groups of pixels in the original image. The second watermark information may be used to synchronize the first watermark information and to detect editing information which does not change pixel values. After editing, only those edited portions of the image need have their embedded data reapplied.
摘要翻译：编辑具有相关联的嵌入数据（诸如打印提示）的数字图像的方法包括在图像编辑之前在原始图像中嵌入第一水印。第一水印方案将第一水印信息与每个像素相关联，并用于检测哪些像素已被编辑。第二水印可以根据将第二水印信息与原始图像中的非重叠像素组相关联的第二水印方案嵌入到原始图像中。第二水印信息可以用于同步第一水印信息并且检测不改变像素值的编辑信息。编辑后，只有图像的编辑部分需要重新应用其嵌入的数据。

7. 发明申请

US20050123194A1 Method of embedding color information in printed documents using watermarking 失效
标题翻译：使用水印嵌入打印文档中的颜色信息的方法
公开(公告)号：US20050123194A1
公开(公告)日：2005-06-09
申请号：US11034131
申请日：2005-01-12
申请人： Zhigang Fan , Shen-ge Wang , Hui Cheng
发明人： Zhigang Fan , Shen-ge Wang , Hui Cheng
IPC分类号： H04N1/387 , G06T1/00 , H04N1/32 , H04N1/46 , H04N1/60 , G06K9/00 , G06K9/40 , G06K15/00 , G06T5/00 , H04N1/407
CPC分类号： H04N1/32309 , G06T1/0021 , G06T2201/0601 , H04N1/32144 , H04N1/32341 , H04N1/6033 , H04N2201/0081 , H04N2201/3242 , H04N2201/3271 , H04N2201/3283
摘要： A method for enhancing color fidelity in multi-reproduction, includes scanning an image to be reproduced, wherein the image contains an invisible digital watermark including color information; decoding the color information contained in the watermark; comparing the decoded color information with the scanned image; generating a correction table from the differences between the decoded color information and the scanned image; and performing color correction on the scanned image using the correction table. This method confines the color error to one generation, even when copies go through multiple reproduction.
摘要翻译：一种用于增强多重再现中的色彩保真度的方法，包括扫描要再现的图像，其中图像包含包含颜色信息的不可见数字水印; 对包含在水印中的颜色信息进行解码; 将解码的颜色信息与扫描图像进行比较; 从解码的颜色信息和扫描图像之间的差异产生校正表; 并使用校正表对扫描图像执行颜色校正。这种方法将颜色误差限制在一代，即使拷贝经过多重再现。

8. 发明授权

US09848105B1 Reducing smear and slow response artifacts in vector error diffusion 失效
公开(公告)号：US09848105B1
公开(公告)日：2017-12-19
申请号：US09080700
申请日：1998-05-18
申请人： Zhigang Fan
发明人： Zhigang Fan
IPC分类号： H04N1/405 , H04N1/60 , G06K15/02
CPC分类号： H04N1/4052 , G06K15/1881 , H04N1/52 , H04N1/6027
摘要： A method of color image processing for quantizing output includes obtaining an input for an object pixel which is represented by a vector in a first color space. A modified input equal to the input plus a sum of errors from other pixels in a neighborhood of the object pixel is generated. For each color component in the first color space, where corresponding color components of the modified input are located with respect to a preset range is determined. If the modified input's color component is greater than the preset range, then that color component for an output is determined to be on; if less than the preset range, then that color component for the output is determine to be off; and, if within the preset range, then that color component for the output is determined to be unknown. A transformed modified input is mapped to a perceptual color space when any color component of the output is unknown. Colors consistent with color components of the output that have already been determined are also mapped to the perceptual color space. The color in the perceptual color space that lies closest to the transformed modified input is chosen. An output in the first color space having color components on and off is generated consistent with the determinations and/or choices made. Error for the object pixel is then calculated as the difference between the output and the modified input.

9. 发明申请

US20160286114A1 IMAGE CAPTURE BY SCENE CLASSIFICATION 有权
标题翻译：通过场景分类的图像捕获
公开(公告)号：US20160286114A1
公开(公告)日：2016-09-29
申请号：US15081281
申请日：2016-03-25
申请人： Zhigang Fan
发明人： Zhigang Fan
IPC分类号： H04N5/235 , H04N5/232 , G02B7/28 , G06T5/00 , G06T5/20 , G06K9/46 , G06K9/62 , G06T7/00
CPC分类号： H04N5/2352 , G02B7/285 , G06K9/4661 , G06K9/6267 , H04N5/23212
摘要： A method, a device and a computer readable for automatically identifying a Christmas tree scene and setting a camera's focus and/or exposure parameters in a way that yields images with high image quality. The Christmas tree scene identification can be performed by segmenting the image into bright and dark regions, identifying the light objects, collecting the statistics of the light objects, and classifying the scene based on the statistics of the light objects, or by collecting the pixel value statistics for the image, and classifying the scene based on the statistics of the pixel values, or by collecting the pixel value statistics for the image, filtering the image, collecting the pixel value statistics for the filtered image, and classifying the scene by comparing the statistics of the pixel values before and after filtering. The focus and exposure settings can be adjusted based on the Christmas tree scene identification results. For Christmas tree scenes, the exposure can be set based on a value that is adjusted upwards from the mean luminance of the image, or on a value that is calculated from the top luminance value. The focus can be set by identifying the lights in the image, and minimizing the light size in the image.
摘要翻译：用于自动识别圣诞树场景并以产生具有高图像质量的图像的方式设置相机的焦点和/或曝光参数的方法，设备和计算机。可以通过将图像分割成明暗区域，识别光对象，收集光对象的统计数据和基于光对象的统计信息对场景进行分类，或者通过收集像素值来执行圣诞树场景识别统计图像，并根据像素值的统计信息对场景进行分类，或者通过收集图像的像素值统计信息，过滤图像，收集滤波图像的像素值统计数据，并对场景进行分类比较过滤前后像素值的统计。焦点和曝光设置可以根据圣诞树场景识别结果进行调整。对于圣诞树场景，可以基于从图像的平均亮度向上调整的值或从顶部亮度值计算的值来设置曝光。可以通过识别图像中的光，并最小化图像中的光线大小来设置焦点。

10. 发明申请

US20160275345A1 CAMERA SYSTEMS WITH ENHANCED DOCUMENT CAPTURE 审中-公开
标题翻译：具有增强文档捕获的摄像机系统
公开(公告)号：US20160275345A1
公开(公告)日：2016-09-22
申请号：US14663538
申请日：2015-03-20
申请人： Zhigang Fan
发明人： Zhigang Fan
IPC分类号： G06K9/00
CPC分类号： G06K9/00442 , G06K2009/363
摘要： A method, a mobile image capturing device and a computer readable for capturing and processing both document and non-document images in optimized manners. The present invention contains steps: a) determining if an image to be captured is a document image or a non-document image; b) capturing and processing said image with methods and parameters optimized for document images if said determination is document; c) capturing and processing said image with methods and parameters optimized for non-document images if said determination is non-document.

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