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公开(公告)号：BR0301947A
公开(公告)日：2004-08-24
申请号：BR0301947
申请日：2003-05-26
Applicant: XEROX CORP
Inventor： FAN ZHIGANG , CHENG HUI , ROLLESTON ROBERT J
Abstract: A method of editing a digital image having associated embedded data, such as printing hints, includes embedding (14) a first watermark in the original image (10) before the image is edited (16). 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.
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公开(公告)号：CA2430021A1
公开(公告)日：2003-11-29
申请号：CA2430021
申请日：2003-05-26
Applicant: XEROX CORP
Inventor： CHENG HUI , FAN ZHIGANG , ROLLESTON ROBERT J
Abstract: 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 secon d 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 ha ve their embedded data reapplied.
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公开(公告)号：CA2430021C
公开(公告)日：2009-07-21
申请号：CA2430021
申请日：2003-05-26
Applicant: XEROX CORP
Inventor： CHENG HUI , FAN ZHIGANG , ROLLESTON ROBERT J
Abstract: 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 secon d 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 ha ve their embedded data reapplied.
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公开(公告)号：DE60323706D1
公开(公告)日：2008-11-06
申请号：DE60323706
申请日：2003-05-23
Applicant: XEROX CORP
Inventor： FAN ZHIGANG , CHENG HUI , ROLLESTON ROBERT J
Abstract: A method of editing a digital image having associated embedded data, such as printing hints, includes embedding (14) a first watermark in the original image (10) before the image is edited (16). 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.
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公开(公告)号：BR0204103A
公开(公告)日：2003-09-16
申请号：BR0204103
申请日：2002-10-10
Applicant: XEROX CORP
Inventor： FAN ZHIGANG , CHENG HUI
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：JP2003263636A
公开(公告)日：2003-09-19
申请号：JP2003000076
申请日：2003-01-06
Applicant: XEROX CORP
Inventor： CHENG HUI , LIN YING-WEI , SCHWEID STUART A
Abstract: PROBLEM TO BE SOLVED: To efficiently and cost-effectively remove speckles from a gray scale and a color image for improving the quality of a scanned image. SOLUTION: An annular window-shaped structuring element A comprising two differently sized squares sharing the same geometric center-point is provided for detecting and removing speckles from a scanned image, and the pixel to be analyzed is at the center point of the structuring element A. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2003143393A
公开(公告)日：2003-05-16
申请号：JP2002288207
申请日：2002-10-01
Applicant: XEROX CORP
Inventor： FAN ZHIGANG , CHENG HUI
Abstract: PROBLEM TO BE SOLVED: To provide a method for segmenting an image using a background- based segmentation process. SOLUTION: 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.
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公开(公告)号：JP2004358967A
公开(公告)日：2004-12-24
申请号：JP2004151923
申请日：2004-05-21
Applicant: Xerox Corp , ゼロックス コーポレイションXerox Corporation
Inventor： CHENG HUI , XU BEILEI , EKLUND ELLIOTT A
CPC classification number: B41J2/2139 , B41J2/0451 , B41J2/04586 , H04N1/58
Abstract: PROBLEM TO BE SOLVED: To reduce artifacts, generated by a broken or malfunctioning injector, without incorporating the other artifacts.
SOLUTION: A method for selectively printing a pixel in a printing position with a missing color comprises determining whether or not the missing color is to be printed in terms of the pixel, determining which color is to be printed according to a value of the color to be printed for the pixel, in terms of the pixel including the missing color, and selecting at least one color to be printed in place of the missing color, in accordance with at least a pseudo-random process, when the missing color is to be printed.
COPYRIGHT: (C)2005,JPO&NCIPI-
9.发明专利Method of embedding color information in printed documents using watermarking 有权使用水印将打印文件中的颜色信息嵌入的方法
公开(公告)号：JP2003283805A
公开(公告)日：2003-10-03
申请号：JP2003035888
申请日：2003-02-14
Applicant: Xerox Corp , ゼロックス・コーポレーション
Inventor： FAN ZHIGANG , WANG SHEN-GE , CHENG HUI
CPC classification number: H04N1/32309 , G06T1/0021 , G06T2201/0601 , H04N1/32144 , H04N1/32341 , H04N1/6033 , H04N2201/0081 , H04N2201/3242 , H04N2201/3271 , H04N2201/3283
Abstract: PROBLEM TO BE SOLVED: To guarantee the same color correction by enhancing a color fidelity in a printed document for each print and for each copy.
SOLUTION: In the method for enhancing the color fidelity in a plurality of times of reproduction is provided with steps for scanning an image to be reproduced, wherein the relevant image contains a digital watermark including color information, decoding the color information included 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 by using the correction table.
COPYRIGHT: (C)2004,JPOAbstract translation: 要解决的问题：通过增强打印文档中的每个打印件和每个副本的色彩保真度来保证相同的颜色校正。 解决方案：在用于增强多次再现中的色彩保真度的方法中，提供了用于扫描要再现的图像的步骤，其中相关图像包含包含颜色信息的数字水印，对包含在其中的颜色信息进行解码 水印，将解码的颜色信息与扫描图像进行比较，根据解码的颜色信息和扫描图像之间的差异生成校正表，并通过使用校正表对扫描图像执行颜色校正。 版权所有（C）2004，JPO
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公开(公告)号：JP2002218254A
公开(公告)日：2002-08-02
申请号：JP2001356899
申请日：2001-11-22
Applicant: XEROX CORP
Inventor： CHENG HUI
Abstract: PROBLEM TO BE SOLVED: To provide image compression method and system. SOLUTION: This image compression method is provided with step of digitizing an image (102) and segmenting the image (102) by a plurality of different methods. The respective segmented images are compressed. Further, the image compression method is provided with the step of deciding a bit rate (RN) for the respective compressed images and the step of deciding how much image distortion (DN) occurs by each compression. Finally, a segmentation method which results in an optimal compromise between the rate and the distortion is selected.
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