By Modifying Optical Image (e.g., Transmissive Overlay) Patents (Class 380/54)
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Patent number: 8347102Abstract: An image processing apparatus generates a password each time transmission of image data is instructed, encrypts the image data with the generated password, transmits the encrypted image data, and notifies the generated password.Type: GrantFiled: March 10, 2006Date of Patent: January 1, 2013Assignee: Canon Kabushiki KaishaInventor: Yoshihide Terao
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Patent number: 8339678Abstract: An apparatus, system, and method for image processing are disclosed, each of which obtains a mark from image data, detects additional information in the mark, determines whether the mark is detected in the mark to generate a determination result, and controls processing performed by an image processing apparatus with respect to the image data based on the determination result.Type: GrantFiled: February 17, 2009Date of Patent: December 25, 2012Assignee: Ricoh Company, Ltd.Inventors: Masaaki Ishikawa, Hiroshi Shimura
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Patent number: 8335014Abstract: A test pattern containing plurality of patches recorded using small dot patterns and large dot patterns is printed. The dot sizes arranged in the patches are different between patches. Then the test patterns are read. The detection rate and average density of additional information embedded in each large dot pattern are obtained. A large dot pattern whose detection rate and average density fall within a reference range and are closest to ideal values is determined. The average density of each small dot pattern is obtained. A small dot pattern whose average density falls within a reference range and is closest to the average density of the determined large dot pattern is determined. A copy-forgery-inhibited pattern image is generated using these dot patterns and combined with a print target image.Type: GrantFiled: May 12, 2009Date of Patent: December 18, 2012Assignee: Canon Kabushiki KaishaInventor: Mizuki Muramatsu
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Patent number: 8331608Abstract: The invention is concerned with a hidden image product, an identification device which shows the hidden image information, an identification system, the produce method of the produce and the identification equipment, the identification equipment contains a single layer or multi-layer lens with the specified array micro-structure. The produce contains the array pixels with same-level array-distance corresponding with the identification equipment array micro-structure. The selected area of the array pixels and the identification equipment array micro-structure has the entirely or partly controlling phase excursion, shows the micro-structure or the hidden image in the pixel when the array of pixels of the product or the array of the identification equipment array micro-structure is superposition or spacedly squaring with distance. The invention overcomes the low anti-false precision and the inconvenience of the existing hidden image identification technique.Type: GrantFiled: July 12, 2007Date of Patent: December 11, 2012Assignee: Digigraphics Toys & Games Ltd.Inventor: Wah Sing Alex Cheung
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Patent number: 8312281Abstract: A computer system includes a printer configured to print invisible coded data tags on print media. Each data tag includes a target and a dot arrangement representing a value. A pen-type device includes an image sensor configured to sense the targets and wirelessly transmit sensed data associated with the dot arrangements. A relay is configured to receive the transmitted data. One or more servers are interfaced to the relay, and are configured to process the received data from the relay and to perform an action based upon the processed data.Type: GrantFiled: November 18, 2008Date of Patent: November 13, 2012Assignee: Silverbrook Research Pty LtdInventors: Kia Silverbrook, Paul Lapstun
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Patent number: 8306876Abstract: When a potential consumer finds a product catalog on the monitor of the consumer's PC showing digital images of products, the potential consumer orders a desired product from a vendor, at least after selecting a desired product from the digital image of the product catalog in a recognized condition by naked eye observation that the color of the digital image of a basic color reference involved in the product catalog is substantially identical to a color reference owned by the potential consumer.Type: GrantFiled: February 3, 2003Date of Patent: November 6, 2012Inventors: Akira Aoki, Hiroshi Shijyo, Mitsuko Shijyo
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Patent number: 8306221Abstract: In an image encryption apparatus for visually encrypting an input image, an encryption area selector selects an encryption area within an input image including an area to be encrypted. An image converter divides the encryption area into a plurality of blocks. The image converter divides each block of the encryption area into a plurality of sub-blocks. An image converter performs an image conversion including rotation and mirror-reverse in accordance with an encryption key on the image in each sub-block. The image converter scrambles the image on a block-by-block basis in accordance with the encryption key. A pixel value converter converts a pixel value of a minimal area in a block so that a position of the block may be detected.Type: GrantFiled: March 26, 2009Date of Patent: November 6, 2012Assignee: Fujitsu LimitedInventors: Jun Takahashi, Taizo Anan, Kensuke Kuraki, Shohei Nakagata
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Patent number: 8300878Abstract: A blind wavelet-based watermarking method is provided to extract one or more embedded watermarks form one or more high subbands of a watermarked image generated by 1-level or 2 level wavelet transform. One or more least-mean-square (LMS) filters are trained to predict the data sets in the high subbands of an original image by converting a low subband of the watermarked image. Therefore, the one or more embedded watermarks could be extracted by comparing the predicted data sets in the high subbands with data sets in corresponding subbands of the watermarked image.Type: GrantFiled: September 9, 2008Date of Patent: October 30, 2012Assignee: National Taiwan University of Science and TechnologyInventors: Jing-Ming Guo, Yu-Quan Tzeng
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Patent number: 8300806Abstract: Systems and methods are provided that employ two or more cryptographically linked codes. The codes, when encrypted, become cipher texts that appear unrelated. The codes described herein are characterized by a series of bits including one or more switch bits. The cipher text of a code having a switch bit in one state will appear to be unrelated to the cipher text of another code differing only in that the switch bit is in the opposite state. The cryptographically linked codes can be used in various combinations, such as on a product and its packaging, on a product and a component of the product, on a certificate packaged with the product and on the packaging, or on outer and inner packagings of the product.Type: GrantFiled: June 20, 2008Date of Patent: October 30, 2012Assignee: YottaMark, Inc.Inventor: Elliott Grant
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Patent number: 8282015Abstract: A document and a related viewer for the document are constructed as image files capable of transmission to a printing site. The document file contains information for printing a document having hidden security indicia, and the viewer file contains information for printing a document viewer having a decrypting portion for revealing the hidden security indicia in the document.Type: GrantFiled: April 27, 2007Date of Patent: October 9, 2012Assignee: Document Security Systems, Inc.Inventors: David Michael Wicker, Michael Scott Caton
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Image processing method, program thereof, image processing apparatus, and inkjet recording apparatus
Patent number: 8279493Abstract: An image processing method is disclosed. A printer driver is a program for performing the method. The printer driver forms print image data that are printed by an inkjet recording apparatus capable of forming multi-level dots by ejecting droplets of recording liquid. The printer driver transforms image data of a manuscript into manuscript image data corresponding to the multi-level dots capable of being output from the inkjet recording apparatus by applying an image process such as a CMM process, a BG/UCR/? correction process, and a gradation process to the image data of the manuscript; further, forms the print image data corresponding to the multi-level dots capable of being output from the inkjet recording apparatus by combining the manuscript image data with data corresponding to the multi-level dots of an image pattern indicating that the manuscript is prohibited from being duplicated by a manuscript and tint block pattern combining section.Type: GrantFiled: March 14, 2006Date of Patent: October 2, 2012Assignee: Ricoh Company, Ltd.Inventors: Takashi Kimura, Masakazu Yoshida, Toshihito Kamei, Taku Satoh -
Patent number: 8280054Abstract: Various embodiments of the present invention are directed to scrambling-descrambling systems for encrypting and decrypting electromagnetic signals transmitted in optical and wireless networks. In one aspect, a system (1302) for scrambling electromagnetic signals comprises a first electronically reconfigurable electro-optical material (1402) positioned to receive a beam of electromagnetic radiation including one or more electromagnetic signals encoding data. The beam is transmitted through the electro-optical material (1402) and a two-dimensional speckled pattern (1410) is introduced into the cross-section of the beam such that data encoded in the one or more electromagnetic signals is scrambled.Type: GrantFiled: April 30, 2009Date of Patent: October 2, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventor: Alexandre M. Bratkovski
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Patent number: 8281138Abstract: Techniques described herein are generally related to steganalysis of suspect media. Steganalysis techniques may include receiving instances of suspect media as input for steganalytic processing. A first set of quantized blocks of data elements may be identified within the media, with this first set of blocks being eligible to be embedded with steganographic data. A second set of quantized blocks of data elements may be identified within the media, with this second set of blocks being ineligible to be embedded with steganographic data. The steganalysis techniques may requantize the first and second blocks. In turn, these techniques may compare statistics resulting from requantizing the first block with statistics resulting from requantizing the second block. The steganalysis techniques may then assess whether the first block of data elements is embedded with steganographic features based on how the statistics of the second blocks compare with the statistics of the first blocks.Type: GrantFiled: April 13, 2009Date of Patent: October 2, 2012Assignee: New Jersey Institute of TechnologyInventors: Yun-Qing Shi, Bin Li
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Patent number: 8270603Abstract: The present invention provides a method and apparatus for the production and labeling of objects in a manner suitable for the prevention and detection of counterfeiting. Thus, the system incorporates a variety of features that make unauthorized reproduction difficult. In addition, the present invention provides an efficient means for the production of labels and verification of authenticity, whereby a recording apparatus which includes a recording medium, having anisotrophic optical domains, along with a means for transferring a portion of the recording medium to a carrier, wherein a bulk portion of the recording medium has macroscopically detectable anisotrophic optical properties and the detecting apparatus thereon.Type: GrantFiled: August 10, 2010Date of Patent: September 18, 2012Assignee: Tracer Detection Technology Corp.Inventors: David I. Durst, Norman Kaish, Jay Fraser, Michael Hoffberg, Brian Rodricks
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Patent number: 8261060Abstract: A content transmitting apparatus, includes: an acquisition device configured to acquire content data distributed in streaming mode; a temporary storage device configured to store temporarily the content data acquired by the acquisition device; a data control device configured to read the content data from the temporary storage device on a first-in first-out basis; an encryption device configured to encrypt in units of a predetermined amount the content data read out by the data control device; and a transmission device configured to transmit the content data encrypted by the encryption device to a predetermined receiving apparatus via a network. If the remaining capacity of the temporary storage device becomes smaller than a predetermined threshold value depending on status of the network, then the data control device discards the content data read from the temporary storage device.Type: GrantFiled: March 10, 2010Date of Patent: September 4, 2012Assignee: Sony CorporationInventor: Ryoki Honjo
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Patent number: 8223964Abstract: A system, method, and apparatus for authenticating microparticle marks or marks including other three-dimensional objects. The authentication utilizes two or more sets of information captured or acquired for the mark in response to illumination of the mark by electromagnetic energy such as in the visible frequency range. These sets of information are then used to verify that the mark includes three-dimensional objects such as microparticles. The two or more sets of information about the mark preferably vary from each other in time, space/directionality, color, frequency or any combinations thereof, and can be captured or acquired as part of one, two, or more images of the microparticle mark.Type: GrantFiled: October 6, 2010Date of Patent: July 17, 2012Assignee: SMI Holdings, Inc.Inventors: Thomas Stierman, Dan Hunt, Chris Zdon
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Patent number: 8213050Abstract: An image processing device, which includes: an original reception unit that receives an original image; a dot image generation unit that generates, on the basis of additive information to be added to the original image, a dot image in which a plurality of dots each formed by one or more pixels are arranged; a state alteration unit that, when any of the dots in the dot image is determined to be not extractable, alters a state of the non-extractable dot on the basis of a relationship between a position on the dot image generated by the dot image generation unit and a corresponding position on the original image; and a composite image generation unit that generates a composite image by superimposing, on the original image, the dot image having the state of the non-extractable dot altered by the state alteration unit.Type: GrantFiled: February 27, 2009Date of Patent: July 3, 2012Assignee: Fuji Xerox Co., Ltd.Inventor: Yasuhiko Iwamoto
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Patent number: 8205086Abstract: The present invention is relate to watermark information embedding apparatus and method for the same, watermark information detecting apparatus and method for the same, and method of containing watermark document. A document image generator (101) generates a document image according to document data (105). A watermark image generator (102) generates a watermark image. The watermark information (106) is denoted with dot pattern, and the dot pattern within the outline of the watermark information are of special value. A synthesizer (103) overlaps document image generated from the document image generator (101) and the watermark image generated from the watermark image generator (102) so as to generate a containing watermark document image.Type: GrantFiled: March 12, 2004Date of Patent: June 19, 2012Assignee: Oki Data CorporationInventor: Kurato Maeno
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Patent number: 8203728Abstract: A print device includes a print data acquisition unit that acquires print data having a plurality of signature attachment areas defined thereon, each signature attachment area having electronic signature data produced therefor and attached thereto, a range data acquisition unit that acquires data indicative of a range of a print target area defined on the print data, and a verification unit that verifies, before completion of acquisition of the print data by the print data acquisition unit, the electronic signature data attached to the signature attachment area containing at least a part of the print target area.Type: GrantFiled: June 20, 2007Date of Patent: June 19, 2012Assignee: Fuji Xerox Co., Ltd.Inventor: Takashi Komatsu
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Patent number: 8199913Abstract: An authenticatable object comprises a surface having a latent hidden image embossed therein. The latent image is an encoded version of an authentication image and comprises a plurality of elements applied to the surface with a predetermined frequency. The latent hidden image is configured for optical decoding by a decoder having a decoder frequency corresponding to the predetermined frequency.Type: GrantFiled: March 10, 2006Date of Patent: June 12, 2012Assignee: Graphic Security Systems Corp.Inventors: Alfred V. Alasia, Alfred J. Alasia, Thomas C. Alasia
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Patent number: 8189861Abstract: A watermark is embedded in a document having a plurality of pages. The pages of the document are analyzed to produce watermark information, which indicates whether the page is suitable for use with one or more of a plurality of watermarking schemes. The plurality of watermarking schemes may include page element shifting, flyspecking and text warping. An identifier (ID) is established, the ID associating the document with a user receiving the document. The ID is embedded in the pages of the document using the plurality of watermark schemes according to the watermark information. To recover an ID from a document, the pages of the document are analyzed to identify watermark information associated with the document. Embedded watermarks are recovered from the pages using the watermark information.Type: GrantFiled: April 5, 2011Date of Patent: May 29, 2012Assignee: Google Inc.Inventor: William J. Rucklidge
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Patent number: 8189863Abstract: A watermark is embedded in a document having a plurality of pages. The pages of the document are analyzed to produce watermark information, which indicates whether the page is suitable for use with one or more of a plurality of watermarking schemes. The plurality of watermarking schemes may include page element shifting, flyspecking and text warping. An identifier (ID) is established, the ID associating the document with a user receiving the document. The ID is embedded in the pages of the document using the plurality of watermark schemes according to the watermark information. To recover an ID from a document, the pages of the document are analyzed to identify watermark information associated with the document. Embedded watermarks are recovered from the pages using the watermark information.Type: GrantFiled: September 26, 2011Date of Patent: May 29, 2012Assignee: Google Inc.Inventor: William J. Rucklidge
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Patent number: 8175322Abstract: A digital camera comprising a watermark-adding device, which comprises a device for obtaining the signal values of digital signals, a bits dividing device, an altered regions initializing device, an eigenvalue calculating device, an encrypting device and a watermark embedding device. The bits dividing device divides the data recording each pixel point of the digital image, on the basis of bit, into bits for calculating the eigenvalue of the image, bits for hiding the watermark and bits for locating altered regions. The altered regions initializing device can set all the data of the bits for locating altered regions to 0 or 1. The eigenvalue calculating device can calculate the eigenvalue of digital signals. The encryption device encrypts the calculated eigenvalue. The watermark embedding device embeds the eigenvalue information in the digital signals.Type: GrantFiled: February 6, 2006Date of Patent: May 8, 2012Assignee: Huaqi Research Institute of Image Computing Co., Ltd.Inventors: Xin Tian, Man Liu, Xianghui Yang
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Patent number: 8170208Abstract: When a decrypting apparatus receives an encrypted image, the apparatus detects the state of the encrypted image and determines whether the encrypted image is an image passed through only a digital medium or an analog medium, according to the state of the encrypted image. When the encrypted image is determined to be the image passed through only the digital medium, the decrypting apparatus switches to perform a digital decryption process and, when the encrypted image is determined to be the image passed through the analog medium, the decrypting apparatus switches to perform an analog decryption process.Type: GrantFiled: September 25, 2008Date of Patent: May 1, 2012Assignee: Fujitsu LimitedInventors: Kensuke Kuraki, Jun Takahashi, Shohei Nakagata, Taizo Anan
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Patent number: 8158253Abstract: Fibers (2, 14) having a plurality of colored regions printed on front and rear sides of said fiber are disclosed, wherein the colors are visible only under ultra-violet light. The regions may be in the form of stripes (4, 6, 8, 10 and 12) or may be arranged is a pseudo-random pattern (16, 18, 20, 22, 24). The regions may be differently colored. Such fibers can be incorporated into paper products as a form of counterfeit protection.Type: GrantFiled: August 28, 2003Date of Patent: April 17, 2012Assignee: D W Spinks (Embossing) Ltd.Inventor: Gary D. Spinks
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Patent number: 8155316Abstract: A method of displaying an image includes generating a contract in the display engine, transferring the contract to the memory controller before the end of a sweep, generating a contract amendment in response to changes in the display engine, transferring the contract amendment to the memory controller, making a decision whether the contract amendment can be processed, fetching data from the memory controller according to the contract incorporating the contract amendment if the decision is that the contract amendment can be processed, sending the fetched data to the display engine in an isochronous stream; and processing the fetched data using the display engine.Type: GrantFiled: February 26, 2007Date of Patent: April 10, 2012Assignee: NVIDIA CorporatonInventors: Duncan A. Riach, Brijesh Tripathi
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Patent number: 8155312Abstract: A device disclosed herein relates to a rotation invariant data storage device comprising, a data storage device with an optically sensible image, encoded data stored within the sensible image, and a plurality of radial vectors stores the encoded data. The encoded data comprises an image that has been encrypted to a two-dimensional (2-D) white noise matrix and converted to a one-dimensional (1-D) array.Type: GrantFiled: September 14, 2006Date of Patent: April 10, 2012Assignee: The University of ConnecticutInventors: Bahram Javidi, Elisabet Perez-Cabre
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Patent number: 8150096Abstract: A method of video fingerprinting computes statistics for video frames and forms a fingerprint used to identify the video as a change in the statistics over the video frames. Another method of video fingerprinting computes values representing motion between different portions of the video and forms a fingerprint to identify the video utilizing data associated with at least the values. Yet another method of video fingerprinting computes values associated with luminance for a first video portion, computes values associated with luminance for a second video portion, determines changes in luminance between the first video portion and the second video portion, and forms a fingerprint to identify the video based at least in part on data associated with the changes.Type: GrantFiled: March 23, 2006Date of Patent: April 3, 2012Assignee: Digimarc CorporationInventor: Adnan M. Alattar
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Patent number: 8150033Abstract: A method of encrypting a set of data is disclosed. The method may include encoding a set of data with a first encryption key, and transforming the set of data encoded with the first encryption key. The method may also include using a second encryption key to encode the transformation of the set of data encoded with the first encryption key. The method may also include transforming the encoded transformation of the set of data encoded with the first encryption key generating thereby and encrypted set of data.Type: GrantFiled: October 4, 2007Date of Patent: April 3, 2012Assignee: University of ConnecticutInventors: Bahram Javidi, Ahouzi Esmail, Guanshen (Eric) Zhang
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Patent number: 8144368Abstract: This disclosure describes methods for using embedded auxiliary signals in documents for copy detection and other applications. In on application, the auxiliary signal is formed as an array of elements selected from a set of print structures with properties that change differently in response to copy operations. These changes in properties of the print structures that carry the embedded auxiliary signal are automatically detectable. For example, the changes make the embedded auxiliary signal more or less detectable. The extent to which the auxiliary data is detected forms a detection metric used in combination with one or more other metrics to differentiate copies from originals. Examples of sets of properties of the print structures that change differently in response to copy operations include sets of colors (including different types of inks), sets of screens or dot structures that have varying dot gain, sets of structures with different aliasing effects, etc.Type: GrantFiled: November 26, 2003Date of Patent: March 27, 2012Assignee: Digimarc CoporationInventors: Tony F. Rodriguez, Alastair M. Reed, Ravi K. Sharma, Osama M. Alattar, Brett T. Hannigan, Kenneth L. Levy, Hugh L. Brunk, Geoffrey B. Rhoads, Ammon E. Gustafson
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Patent number: 8126142Abstract: It is a source of security digital characters, incomprehensible to the naked eye, which can only be identified when the transparent substrate (acrylic, plastic or another material) is placed over the substrate on which they were printed (paper, PVC, polyester, film or others), or over the screen where they are displayed (CRT, LCD, plasma, acrylic or others), and the characters that are unreadable characters may be embedded or may be part of photos, images, drawings, illustrations, logos or figures, and the transparent base contains the remaining and complementary parts of the characters already printed or displayed on the screen, in a manner that their combination with the characters printed or displayed on the screen reveals them or make them comprehensible and identifiable, being that each substrate, described thus, may reveal or make comprehensible a series of documents containing these sources printed or displayed on the screen, or may even reveal and make the characters printed or displayed on the screenType: GrantFiled: August 21, 2007Date of Patent: February 28, 2012Assignee: Interprint Ltda.Inventor: João Robinson Rozado
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Patent number: 8126141Abstract: Embodiments of interferometric communication are disclosed.Type: GrantFiled: February 21, 2007Date of Patent: February 28, 2012Assignee: Hewlett-Packard Development Company, L.P.Inventors: Kuohua (Angus) Wu, Andrew L. Van Brocklin
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Patent number: 8127137Abstract: The present invention provides encryption techniques useful with digital watermarking payloads. One claim recites: a method to secure a first digital watermark payload and a second digital watermark payload through encryption of only one of the first digital watermark payload or the second digital watermark payload. The method includes: utilizing a multi-purpose computer processor configured to: provide information redundantly in the first digital watermark payload and the second digital watermark payload, yet the first digital watermark payload includes at least some information that is unique relative to at least the second digital watermark payload; encrypt the first digital watermark payload; embed a first digital watermark in media, the media representing audio, imagery or video, the first digital watermark comprising the encrypted first digital watermark payload; and embed a second digital watermark in the media, the second digital watermark comprising the second digital watermark payload.Type: GrantFiled: March 15, 2005Date of Patent: February 28, 2012Assignee: Digimarc CorporationInventor: Kenneth L. Levy
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Patent number: 8125691Abstract: A watermark information embedding apparatus generates a document image from electronic document data that has been input thereto, modifies the electronic document data based upon the document image and embeds information in the electronic document data. The apparatus includes a document image generator for generating a document image from the electronic document data; a document analyzer for detecting layout information of each constituent image in the generated document image; a normalization information calculation unit for calculating normalization information, which is for normalizing placement of each constituent image, based upon the detected layout information; a modification unit for modifying the electronic document data; and an embedding unit for embedding information in the modified electronic document data.Type: GrantFiled: October 1, 2008Date of Patent: February 28, 2012Assignee: Canon Kabushiki KaishaInventor: Kenichi Okihara
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Patent number: 8096466Abstract: A system for recording a transaction relating to a security document, the security document having disposed thereon or therein coded data including a number of coded data portions. Each coded data portion is indicative of at least an identity of the security document. The system includes a computer system that receives indicating data from a sensing device, in response to sensing of the coded data. The computer system determines the identity of the security document and the transaction and uses this to update transaction data indicative of the identity of the security document and the transaction.Type: GrantFiled: May 27, 2010Date of Patent: January 17, 2012Assignee: Silverbrook Research Pty LtdInventors: Kia Silverbrook, Paul Lapstun
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Patent number: 8090141Abstract: A system and method are disclosed for determining preferred image locations for placing watermark information (both hidden and obvious). The disclosure includes at least three criteria (image similarity, contrast, and image value range) that may be used alone or in combination to determine a preferred area of the target image for placing the watermark depending upon the user's intent for the mark (hiding or showing watermark).Type: GrantFiled: January 31, 2006Date of Patent: January 3, 2012Assignee: Xerox CorporationInventors: Reiner Eschbach, Shen-ge Wang, Zhigang Fan
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Patent number: 8089661Abstract: In a computer system in which information represented by digital data is output to plural pages of recording medium, and then information on the plural pages of recording medium is read to use digital data representing the read information, authentication information is embedded in information of a start page selected by the computer system; a page number of the start page embedded the authentication information is notified to a user; information on the plural pages of recording medium is read, wherein the start page is positioned so as to be read first; digital data read from the plural pages of recording medium is authenticated based on the authentication information embedded in the start page; and a process for the digital data read from the plural pages of recording medium is controlled in accordance with a result of the authentication.Type: GrantFiled: June 19, 2008Date of Patent: January 3, 2012Assignee: Canon Kabushiki KaishaInventor: Ryuta Mori
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Patent number: 8085978Abstract: Digital data is decoded from media signals (e.g., audio, images, video, etc.) using a distributed processing in which a first device receives and pre-processes the signal, and transmits it to a remote device for further decoding. One method pre-filters the media signal, leaving a residual from which digital data is decoded. Other arrangements progressively send portions of the signal for decoding operations.Type: GrantFiled: March 9, 2010Date of Patent: December 27, 2011Assignee: Digimarc CorporationInventors: Trent J. Brundage, Brett T. Hannigan, Ravi K. Sharma
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Patent number: 8031377Abstract: An image forming apparatus includes a paper fiber reading unit that reads fiber properties of a paper sheet; an encryption unit that encrypts at least a part of an input image based on the fiber properties read by the paper fiber reading unit; and a printing unit that prints an encrypted image portion encrypted by the encryption unit and an image including information representing the fiber properties read by the paper fiber reading unit on the paper sheet whose fiber properties are read by the paper fiber reading unit.Type: GrantFiled: April 3, 2008Date of Patent: October 4, 2011Assignee: Fuji Xerox Co., Ltd.Inventors: Atsushi Ugajin, Toshio Hisamura, Yoshitake Matsubara, Hirokazu Tsubota, Satoshi Kurashima, Osamu Yasui, Yasuhiro Arai, Masaki Fujise
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Patent number: 8023159Abstract: 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.Type: GrantFiled: July 9, 2008Date of Patent: September 20, 2011Assignee: International Business Machines CorporationInventors: Gordon W. Braudaway, Frederick C. Mintzer
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Patent number: 8009326Abstract: In some embodiments, techniques for voting and visual cryptography may include various enhancements.Type: GrantFiled: January 5, 2010Date of Patent: August 30, 2011Inventors: James A. Roskind, Aaron T. Emigh
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Patent number: 7999973Abstract: A method of controlling an apparatus which is capable of determining a dot disposition of a copy-forgery-inhibited pattern image is disclosed. The copy-forgery-inhibited pattern image has a latent image area in which a number of first dots and a number of second dots smaller than the first dots are disposed and a background area in which a number of the second dots are disposed. The first dots can be reproduced when copied. The method includes displaying information related to a disposition of the first dots and the second dots in the latent image area, setting a rate of the first dots that are disposed in the latent image area, or a rate of the second dots that are disposed in the latent image area, in accordance with a designation performed by a user, and determining the dot disposition in the latent image area in accordance with the setting of the rate.Type: GrantFiled: September 21, 2006Date of Patent: August 16, 2011Assignee: Canon Kabushiki KaishaInventors: Hiroaki Nakata, Masanori Aritomi, Tatsuro Uchida, Masaki Yamamichi
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Publication number: 20110194690Abstract: A watermarking system uses distinct bit patterns to identify a logic 0, a logic 1, and a marker bit, which demarcates segments of logic bit information. Marker bits, which are printed on both foreground and background areas of an image, outline message blocks. In message extraction, a preprocessing step removes any white boarders, identifies the best defined corner of a message block, crops the image, and rotates the image to place the identified corner at the top-left corner. Message extraction scans the rotated image in window segments of increasing size during multiple cycles. During each cycle, if a bit pattern cannot be identified as a data bit, then the size of the examined bit area is increased and rechecked to see it specifically is a marker bit. If no bit information can be definitively identified, then it is assigned a logic bit value based on a 50% random assignment.Type: ApplicationFiled: February 5, 2010Publication date: August 11, 2011Inventors: Mithun Das Gupta, Jing Xiao
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Patent number: 7995246Abstract: The present invention is concerned with detection of a “fragile watermark” in a printed image to aid in a determination whether a document under examination is an original or a copy. The watermark may be applied by phase-space encoding data to be included in the watermark. The image may be examined on a block-by-block basis after scanning. Correlation of detected watermark strength with block brightness and/or with wave vectors used for encoding may be used to detect that the image is a copy.Type: GrantFiled: November 24, 2003Date of Patent: August 9, 2011Assignee: Pitney Bowes Inc.Inventors: Robert A. Cordery, Claude Zeller, Bertrand Haas
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Patent number: 7984491Abstract: Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorithm. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.Type: GrantFiled: October 16, 2009Date of Patent: July 19, 2011Assignee: Computer Systems Engineering Co., Ltd.Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai
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Patent number: 7983440Abstract: A system and method are provided for selecting frames of a compressed video stream that may be used for client-side watermarking. In general, a content source evaluates a number of Intra-Frames (I-Frames) in the compressed video stream using a sample watermark that is similar to actual watermarks that may be used for client-side watermarking. More specifically, each of a number of I-Frames in the compressed video stream is evaluated by first watermarking the I-Frame with the sample watermark. Associated frames in the compressed video stream are then decoded using the watermarked I-Frame. An error value for the decoded video frames is then computed. If the error value is outside of a predetermined error threshold range, the I-Frame is selected as an I-Frame that may be used for client-side watermarking.Type: GrantFiled: November 2, 2006Date of Patent: July 19, 2011Assignee: Qurio Holdings, Inc.Inventors: Thomas A. Roberts, Gregory Morgan Evans, Cheryl Adams
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Patent number: 7966267Abstract: A method and system for authenticating an item by using a security marking. The security marking is provided on the item with an OVD ink capable of absorbing light in a visible wavelength range to appear visibly black and producing a red fluorescent emission under ultraviolet excitation. Under visible light illumination and ultraviolet excitation, a visible image and a fluorescent image are obtained from the security marking using image scanners. The images are compared to find a substantial match with each other. The security marking can be a postage indicium, a barcode, a symbol, a message or an image. The item to be authenticated can be a mailpiece, a banknote, a tag, a ticket, a document, an identification card, or the like.Type: GrantFiled: April 13, 2009Date of Patent: June 21, 2011Assignee: Pitney Bowes Inc.Inventors: Judith D. Auslander, Robert A Cordery, Claude Zeller
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Patent number: 7945948Abstract: Disclosed is an off-line user authentication system, which is designed to present a presentation pattern to a user subject to authentication, and apply a one-time-password derivation rule serving as a password to certain pattern elements included in the presentation pattern at specific positions so as to create a one-time password. An off-line authentication client pre-stores a plurality of pattern element sequences each adapted to form a presentation pattern, and a plurality of verification codes created by applying a one-time-password derivation rule to the respective presentation patterns and subjecting the obtained results to a one-way function algorism. A presentation pattern is created using one selected from the stored pattern element sequences, and presented to a user. A one-time password entered from the user is verified based on a corresponding verification code to perform user authentication. The present invention provides an off-line matrix authentication scheme with enhanced security.Type: GrantFiled: June 9, 2006Date of Patent: May 17, 2011Assignee: Computer Systems Engineering Co., Ltd.Inventors: Yukiya Ueda, Tsugune Saito, Shigetomo Tamai
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Patent number: 7925015Abstract: An image forming system according to one embodiment of the present invention has a user authentication mode for granting only authorized users a setting change for an image forming apparatus. This image forming apparatus 200 includes a user authentication section 203 to perform authentication on receiving user information from a host computer 100. The image forming apparatus 200 also issues an authentication key for an authorized user and sends the key to the host computer 100. The host computer 100 sends a changed setting and the authentication key to the image forming apparatus 200, whereby making the setting change swiftly. This structure makes it possible to address a problem with related art systems that send user information every time a setting is changed and send a changed setting only when a user is deemed to have authority where authentication is redundant and time consuming.Type: GrantFiled: September 28, 2006Date of Patent: April 12, 2011Assignee: Kyocera Mita CorporationInventors: Toru Yasui, Takashi Araki, Keiko Fujii
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Patent number: 7921296Abstract: Hashes are short summaries or signatures of data files which can be used to identify the file. The disclosed method generates robust hashes for multimedia content, for example, audio clips. The audio clip is divided into successive (preferably overlapping) frames. For each frame, the frequency spectrum is divided into bands. A robust property of each band (e.g. energy) is computed and represented by a respective hash bit. An audio clip is thus represented by a concatenation of binary hash words, one for each frame. To identify a possibly compressed audio signal, a block of hash words derived therefrom is matched by a computer with a large database. Such matching strategies are also disclosed. In an advantageous embodiment, the extraction process also provides information as to which of the hash bits are the least reliable. Flipping these bits considerably improves the speed and performance of the matching process.Type: GrantFiled: May 7, 2007Date of Patent: April 5, 2011Assignee: Gracenote, Inc.Inventors: Jaap Andre Haitsma, Antonius Adrianus Cornelis Maria Kalker, Constant Paul Marie Jozef Baggen, Job Cornelis Oostveen