Patents by Inventor Kohichi Kamijoh

Kohichi Kamijoh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080151280
    Abstract: An image of a sample print printed to obtain parameters is picked up by using “a parameter obtaining device” that meets the standards of an instrument for the invention of “the electronic scrap system.” Then, the picked-up image is captured by a DTP system, and color data of a needed position are imported to a parameter DB. Thereby, parameters for simulation to be used in an invisible code printing support system can be easily inputted. Use of this method eliminates the necessity of figuring out parameters through experiments and the like, and of inputting these parameters as numerical values. In addition, since this method uses a physical medium and inks to be actually used, as they are, their optical characteristics, an influence of a blue component of invisible light emitted from an ultraviolet LED, and the like can be inputted all together as a picked-up image.
    Type: Application
    Filed: December 21, 2007
    Publication date: June 26, 2008
    Inventors: Noboru Kamijo, Kohichi Kamijoh
  • Publication number: 20080075288
    Abstract: To delegate authority for cryptographic communication without increasing the risk of leaking a device key. A system and method including a first communication apparatus and a managing apparatus allowing the first communication apparatus to perform cryptographic communication with an external at least one second communication apparatus. The managing apparatus includes: storing a first device key shared with the second communication apparatus; generating a computation by passing the first device key read from the stored keys to a keyed one-way function, to generate a computed result as a second device key; and outputting the second device key and a key of the one-way function to the first communication apparatus. The first communication apparatus transmits a key of a one-way function to the second communication apparatus causing the second communication apparatus to perform a computation which generates a second device key, and which performs a cryptographic communication with a second communication apparatus.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 27, 2008
    Applicant: International Business Machines Corporation
    Inventors: Kohichi Kamijoh, Masaharu Sakamoto
  • Publication number: 20080075291
    Abstract: To delegate authority for cryptographic communication without increasing the risk of leaking a device key. A system and method including a first communication apparatus and a managing apparatus allowing the first communication apparatus to perform cryptographic communication with an external at least one second communication apparatus. The managing apparatus includes: storing a first device key shared with the second communication apparatus; generating a computation by passing the first device key read from the stored keys to a keyed one-way function, to generate a computed result as a second device key; and outputting the second device key and a key of the one-way function to the first communication apparatus. The first communication apparatus transmits a key of a one-way function to the second communication apparatus causing the second communication apparatus to perform a computation which generates a second device key, and which performs a cryptographic communication with a second communication apparatus.
    Type: Application
    Filed: September 12, 2007
    Publication date: March 27, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kohichi Kamijoh, Masaharu Sakamoto
  • Patent number: 7065227
    Abstract: Watermark data that indicate additional information, such as copyright information, are optimized in accordance with the contents of object data, and the watermark data is embedded in image data. An image divider 200 divides image data Vi into image blocks Iij, and corresponds a selected basic pattern Phij with each of the image blocks Iij. Orthogonal transformation units 24 and 202 generate DFT coefficients I?ij and P?hij, and power element calculators 208 and 264 generate power elements I?ij and P?ij. A basic pattern adjustment unit 26 adjusts the coefficient of P?hij to generate P?hij1 to P?hijn. A watermark pattern generator 28 calculates variations before and after P?hij1 to P?hijn are embedded in I?ij, and selects, from P?hij1 to P?hijn, P??hij1 to P??hij1 that provide variations equal to or smaller than the threshold value e. Then, the watermark pattern generator 28 selects, as a watermark pattern P?ij, the pattern that is most easily detectable, and a pattern embedding unit 204 that adds P?ij to I?ij.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: June 20, 2006
    Assignee: International Business Machines Corporation
    Inventors: Masaaki Taniguchi, Shuhichi Shimuzu, Kohichi Kamijoh
  • Patent number: 7046817
    Abstract: It is one object of the present invention to prevent embedded verification information from being lost even when a quantization process is performed after verification information has been embedded. A pre-embedding portion 32 converts a image data value so that quantized values not changing by error introduced through the embedding process. A hash value calculator 300 calculates a hash value using image data and key information, and a hash value embedding portion 302 embeds the hash value in the image data. An output format converter 304 quantizes the image data in which the hash value is embedded, and generates JPEG data.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: May 16, 2006
    Assignee: International Business Machines Corporation
    Inventors: Kohichi Kamijoh, Norishiqe Morimoto, Satoko Tonegawa
  • Patent number: 7006655
    Abstract: The present invention provides methods, apparatus and systems for embedding and detecting an electronic watermark without requiring signals for geometric compensation. A particular embodiment uses a periodic pattern with repetition as an embedded pattern itself, which has information embedded as an electronic watermark, and observes the change of its period upon detection to calculate the scaling factor. When detecting the electronic watermark, the scaling factor of images is calculated from digital data that underwent the scaling processing, and then the processing to detect the electronic watermark is performed based on the obtained scaling factor.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: February 28, 2006
    Assignee: International Business Machines Corporation
    Inventors: Masaaki Taniguchi, Shuhichi Shimizu, Kohichi Kamijoh, Ryoh Sugihara
  • Patent number: 6963655
    Abstract: The present invention is directed to the detection of what part of an image alteration was added to by embedding an electronic watermark in the image. More particularly, embedding part 30 renders as pairs two each of DCT blocks of luminance component Y of an image, randomly selects, by using a random number, mutually corresponding DCT coefficients from each DCT block contained in the pairs, and manipulates so that the relationship among these DCT coefficients represent data according to a certain rule, and then embeds the data. If alteration is added to this image, the DCT coefficients contained in the pairs in the altered part do not observe the above rule and represent different values from the original data. Extraction part 40 extracts data from the image, and makes decision by majority to estimate the initially embedded data to detect and display the pairs from which different data form the estimated data was extracted as those to which alteration was added.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: November 8, 2005
    Assignee: International Business Machines Corporation
    Inventors: Satoko Tonegawa, Norishige Morimoto, Kohichi Kamijoh
  • Publication number: 20050097329
    Abstract: Method and system for embedding a unique and different digital watermark in digital contents for each access without increasing the overhear or load at the contents server. The contents server has a digital watermark-embedded contents storage unit for storing a plurality of digital contents where a different digital watermark is embedded, and a fingerprint performing unit for, adding to the digital contents the information specified using a bit row that is formed by a digital watermark being embedded for each part of the digital contents.
    Type: Application
    Filed: August 7, 2003
    Publication date: May 5, 2005
    Inventors: Norishige Morimoto, Kohichi Kamijoh, Seiji Kobayashi, Masato Kurokawa
  • Publication number: 20040223612
    Abstract: [Object]To provide lossless embedding of a visible watermark in compressed motion picture data.
    Type: Application
    Filed: March 25, 2004
    Publication date: November 11, 2004
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kohichi Kamijoh, Seiji Nagata, Masaaki Taniguchi
  • Publication number: 20020114490
    Abstract: The present invention provides methods, apparatus and systems for embedding and detecting an electronic watermark without requiring signals for geometric compensation. A particular embodiment uses a periodic pattern with repetition as an embedded pattern itself, which has information embedded as an electronic watermark, and observes the change of its period upon detection to calculate the scaling factor. When detecting the electronic watermark, the scaling factor of images is calculated from digital data that underwent the scaling processing, and then the processing to detect the electronic watermark is performed based on the obtained scaling factor.
    Type: Application
    Filed: September 11, 2001
    Publication date: August 22, 2002
    Applicant: International Business Machines Corporation
    Inventors: Masaaki Taniguchi, Shuhichi Shimizu, Kohichi Kamijoh, Ryoh Sugihara
  • Publication number: 20020001394
    Abstract: It is one object of the invention to optimize watermark data that indicate additional information, such as copyright information, in accordance with the contents of object data, and, for example, to embed the watermark data in image data.
    Type: Application
    Filed: April 13, 2001
    Publication date: January 3, 2002
    Inventors: Masaaki Taniguchi, Shuhichi Shimuzu, Kohichi Kamijoh
  • Publication number: 20010010729
    Abstract: It is one object of the present invention to prevent embedded verification information from being lost even when a quantization process is performed after verification information has been embedded. A pre-embedding portion 32 converts a image data value so that quantized values not changing by error introduced through the embedding process. A hash value calculator 300 calculates a hash value using image data and key information, and a hash value embedding portion 302 embeds the hash value in the image data. An output format converter 304 quantizes the image data in which the hash value is embedded, and generates JPEG data.
    Type: Application
    Filed: January 18, 2001
    Publication date: August 2, 2001
    Inventors: Kohichi Kamijoh, Norishiqe Morimoto, Satoko Tonegawa