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公开(公告)号：JPS62169537A
公开(公告)日：1987-07-25
申请号：JP27551986
申请日：1986-11-20
Applicant: IBM
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2.发明专利
公开(公告)号：JP2002252753A
公开(公告)日：2002-09-06
申请号：JP2001377437
申请日：2001-12-11
Applicant: IBM
Inventor： BRAUDAWAY GORDON WESLEY , MINTZER FREDERICK COLE
Abstract: PROBLEM TO BE SOLVED: To provide a method that provides a watermark on a digital image including original pixels with original luminance to generate a watermarked image. SOLUTION: This invention prepares a watermarking plane including watermarking parameters with one-to-one correspondence to the original pixels, each having a watermarking magnification to be multiplied with the luminance of the original pixel of the digital image and multiplying the watermarking magnification of corresponding one of the watermarking parameters with each luminance of the original pixel generates a watermarked image. In this case, the watermarking magnification is selected within 0.9-1.1.
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公开(公告)号：JPH10191017A
公开(公告)日：1998-07-21
申请号：JP29209097
申请日：1997-10-24
Applicant: IBM
Inventor： BRAUDAWAY GORDON WESLEY , MINTZER FREDERICK COLE
Abstract: PROBLEM TO BE SOLVED: To impart an invisible identification mark on an image and to make elimination impossible by a normal means by multiplying a prescribed luminance magnification to the luminance data of the respective pixels of digitized images and performing watermarking. SOLUTION: Image data 101 fetched from a physical source 102 by a scanner 100 are sent to a digital computer 104. By a (front end) image processing 112, scaling and expansion, etc., are performed and they are kept in an archive 110. Then, after performing the watermarking by the watermarking 114, compression or the like on a screen is performed in a (back end) image processing 116 and then, they are kept in a work storage area 106 and an image storage area 108. In the watermarking, the prescribed luminance magnification of 0.9-1.1 is multiplied to the luminance data of the pixels on the images. The watermarked image data are sent through an image server 118 to a digital network 120 and outputted by a display device 124 and a printer 126.
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公开(公告)号：GB2358100A
公开(公告)日：2001-07-11
申请号：GB0029063
申请日：2000-11-29
Applicant: IBM
Inventor： BRAUDAWAY GORDON WESLEY , MARTENS MARCO , SHEARER JAMES B , TRESSER CHARLES PHILIPPE LOUIS , WU CAHI W
Abstract: The present invention relates to a digital watermarking method and system which encode different pairs of watermarks into each of a plurality of images offered for use by a vendor. The watermarks in each pair are derived from two separate collections (COL1 and COL2) of watermarks and sufficiently different so as to prevent false positives. Because each pair of watermarks is assigned to a different customer relative to a particular image, unauthorised use of a digital image sold to a customer may be determined by locating the associated pair of watermarks assigned to the customer in the image. Collusion detection is also realized by forming each pair of masks from sub-collections of masks which are detectable in an image formed by combining the same images sold to one or more customers.
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公开(公告)号：DE69319848T2
公开(公告)日：1999-03-25
申请号：DE69319848
申请日：1993-10-19
Applicant: IBM
Inventor： BRAUDAWAY GORDON WESLEY , DELP HELEN ROXLO
Abstract: Faithful color images are created in an efficient manner for display on a specific computer display. A standard computer system generates a palette calibration table, based on information about a standard display. The standard computer system then creates a device independent image from the palette calibration table and from an original image. The palette calibration table and device independent image are then transmitted to a specific computer system. The specific computer system receives the palette calibration table and device independent image from the standard computer system. It calculates a display specific palette from the palette calibration table and from information about the specific display. The specific computer system then generates the faithful color image for display by sending the device independent image and the display specific palette to the display adapter in the specific computer system.
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Patent Agency Ranking
公开(公告)号：DE3687792D1
公开(公告)日：1993-03-25
申请号：DE3687792
申请日：1986-12-18
Applicant: IBM
Inventor： MELTZER CLIFFORD BENNETT , KANNAN KRISHNAMURTHI , BURKET THOMAS GERARD , KRUESI DEBORAH JEAN , BRAUDAWAY GORDON WESLEY
Abstract: Automatic detection of and recovery from errors of transmissions in the form of a sequence of data packets is described as well as an improved combination of end-of-text (ETX) bytes along with checksums in each data packet to detect errors. The ETX character (12) is dynamically selected for each packet after the data comprising the packet has been assembled. This character is coded differently from the remaining character codes in its respective packet and is made the second byte thereof following the start-of-text byte (STX). The third byte (3) in each packet is made the complement of the preceding ETX byte, the latter of which is also made the last byte in the packet. Other bytes in each packet include: one byte (4) indicating the location of the packet in a set in a given transmission sequence; a byte (7) distinguishing the packet's set from other transmission sequences; two bytes (5,6) indicative of the number of data bytes in the packet; one byte (8) operating as a control character indicating the functional nature of the packet; data bytes; and two checksum bytes (9,10+m) which precede the last ETX byte. Upon detection of an error in a packet, the transmitter is immediately notified and retransmission is carried out only from the erroneous packet rather than from the beginning of the entire sequence as in the prior art.
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公开(公告)号：BRPI0619398A2
公开(公告)日：2012-07-17
申请号：BRPI0619398
申请日：2006-11-10
Applicant: IBM
Inventor： BRAUDAWAY GORDON WESLEY , MINTZER FREDERICK COLE
Abstract: The present invention provides methods and apparatus for embedding an identifying pattern of visible speckles into the digitized image of each page of a document. A speckle is a cluster of black or white pixels. Speckles are printed as black speckles on the white paper, or conversely, as areas of missing black removed from the black text characters, called white speckles. The collective pattern of all embedded black and white speckles on a single document page is called a specklemark. A specklemark can survive contrast manipulations on photocopiers and binary rasterization done by fax scanning prior to data transmission. The random pattern of the black and white speckles visible in the digitized image of a document page can be detected automatically, and by systematically matching the detected pattern with those known to have been embedded into marked copies of a document page, a specific document copy can be identified. Methods for composing, embedding and detecting specklemarks are the subject of this patent.
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公开(公告)号：MX9303885A
公开(公告)日：1994-05-31
申请号：MX9303885
申请日：1993-06-28
Applicant: IBM
Inventor： BRAUDAWAY GORDON WESLEY , DELP HELEN ROXLO
Abstract: Faithful color images are created in an efficient manner for display on a specific computer display. A standard computer system generates a palette calibration table, based on information about a standard display. The standard computer system then creates a device independent image from the palette calibration table and from an original image. The palette calibration table and device independent image are then transmitted to a specific computer system. The specific computer system receives the palette calibration table and device independent image from the standard computer system. It calculates a display specific palette from the palette calibration table and from information about the specific display. The specific computer system then generates the faithful color image for display by sending the device independent image and the display specific palette to the display adapter in the specific computer system.
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公开(公告)号：GB2358100B
公开(公告)日：2004-03-17
申请号：GB0029063
申请日：2000-11-29
Applicant: IBM
Inventor： BRAUDAWAY GORDON WESLEY , MARTENS MARCO , SHEARER JAMES B , TRESSER CHARLES PHILIPPE LOUIS , WU CAHI W
Abstract: A digital watermarking method encodes different pairs of watermarks into each of a plurality of images offered for use by a vendor. The watermarks in each pair are derived from two separate collections of watermarks and sufficiently different so as to prevent false positives. Because each pair of watermarks is assigned to a different customer relative to a particular image, unauthorized use of a digital image sold to a customer may be determined by locating the associated pair of watermarks assigned to the customer in the image. Collusion detection is also realized by forming each pair of masks from sub-collections of masks which are detectable in an image formed by combining the same images sold to one or more customers.
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