CA2088235A1 - Image processing for adding images information unrecognizable to human eyes - Google Patents

Image processing for adding images information unrecognizable to human eyes

Info

Publication number
CA2088235A1
CA2088235A1 CA002088235A CA2088235A CA2088235A1 CA 2088235 A1 CA2088235 A1 CA 2088235A1 CA 002088235 A CA002088235 A CA 002088235A CA 2088235 A CA2088235 A CA 2088235A CA 2088235 A1 CA2088235 A1 CA 2088235A1
Authority
CA
Canada
Prior art keywords
added
predetermined value
image processing
pixel data
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002088235A
Other languages
French (fr)
Other versions
CA2088235C (en
Inventor
Akira Negishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP01704692A external-priority patent/JP3367959B2/en
Priority claimed from JP04103392A external-priority patent/JP3193098B2/en
Application filed by Canon Inc filed Critical Canon Inc
Publication of CA2088235A1 publication Critical patent/CA2088235A1/en
Application granted granted Critical
Publication of CA2088235C publication Critical patent/CA2088235C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00838—Preventing unauthorised reproduction
    • H04N1/00856—Preventive measures
    • H04N1/00864—Modifying the reproduction, e.g. outputting a modified copy of a scanned original
    • H04N1/00867—Modifying the reproduction, e.g. outputting a modified copy of a scanned original with additional data, e.g. by adding a warning message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00838—Preventing unauthorised reproduction
    • H04N1/00856—Preventive measures
    • H04N1/00864—Modifying the reproduction, e.g. outputting a modified copy of a scanned original
    • H04N1/00867—Modifying the reproduction, e.g. outputting a modified copy of a scanned original with additional data, e.g. by adding a warning message
    • H04N1/0087—Modifying the reproduction, e.g. outputting a modified copy of a scanned original with additional data, e.g. by adding a warning message with hidden additional data, e.g. data invisible to the human eye
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3204—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to a user, sender, addressee, machine or electronic recording medium
    • H04N2201/3205—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to a user, sender, addressee, machine or electronic recording medium of identification information, e.g. name or ID code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3269—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of machine readable codes or marks, e.g. bar codes or glyphs
    • H04N2201/327—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of machine readable codes or marks, e.g. bar codes or glyphs which are undetectable to the naked eye, e.g. embedded codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3271—Printing or stamping

Abstract

Provided are an image processing method and apparatus in which there is little deterioration in picture quality when specific information specifying a copying machine or the user thereof is added to image data. Pixel data in an 8 x 4 array at a predetermined position of the image data is modulated by subtracting a predetermined value .alpha. from 2 x 4 pixel data 2302 and 2 x 4 pixel data 2303 and adding the predetermined value a to 4 x 4 pixel data 2301 in such a manner that the number of pixels from which the predetermined value is subtracted and the number of pixels to which the predetermined value is added will become equal. The modulated data serves as a unit of added information. A
plurality of units of the added information are arranged on the image data and the added information is represented by the mutual positional relationship of the plurality of information units.
CA002088235A 1992-01-31 1993-01-27 Image processing for adding images information unrecognizable to human eyes Expired - Fee Related CA2088235C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP4-017046 1992-01-31
JP01704692A JP3367959B2 (en) 1992-01-31 1992-01-31 Image processing apparatus and method
JP04103392A JP3193098B2 (en) 1992-02-27 1992-02-27 Image processing apparatus and method
JP4-041033 1992-02-27

Publications (2)

Publication Number Publication Date
CA2088235A1 true CA2088235A1 (en) 1993-08-01
CA2088235C CA2088235C (en) 2001-11-27

Family

ID=26353502

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002088235A Expired - Fee Related CA2088235C (en) 1992-01-31 1993-01-27 Image processing for adding images information unrecognizable to human eyes

Country Status (4)

Country Link
US (1) US6166750A (en)
EP (1) EP0554115B1 (en)
CA (1) CA2088235C (en)
DE (1) DE69324290T2 (en)

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US5721788A (en) 1992-07-31 1998-02-24 Corbis Corporation Method and system for digital image signatures
US6421145B1 (en) * 1992-09-28 2002-07-16 Canon Kabushiki Kaisha Image processing apparatus and method using image information and additional information or an additional pattern added thereto or superposed thereon
US6574350B1 (en) 1995-05-08 2003-06-03 Digimarc Corporation Digital watermarking employing both frail and robust watermarks
US6681028B2 (en) 1995-07-27 2004-01-20 Digimarc Corporation Paper-based control of computer systems
US6580819B1 (en) * 1993-11-18 2003-06-17 Digimarc Corporation Methods of producing security documents having digitally encoded data and documents employing same
US6522770B1 (en) 1999-05-19 2003-02-18 Digimarc Corporation Management of documents and other objects using optical devices
JP2996277B2 (en) * 1994-06-15 1999-12-27 富士ゼロックス株式会社 Image forming device
GB2292036A (en) * 1994-08-02 1996-02-07 Gestetner Management Ltd Data security monitoring system
DE69525918T2 (en) * 1994-12-28 2002-08-01 Canon Kk Image processing device
US6721440B2 (en) 1995-05-08 2004-04-13 Digimarc Corporation Low visibility watermarks using an out-of-phase color
US6590996B1 (en) 2000-02-14 2003-07-08 Digimarc Corporation Color adaptive watermarking
US6728390B2 (en) 1995-05-08 2004-04-27 Digimarc Corporation Methods and systems using multiple watermarks
US6788800B1 (en) 2000-07-25 2004-09-07 Digimarc Corporation Authenticating objects using embedded data
US6829368B2 (en) 2000-01-26 2004-12-07 Digimarc Corporation Establishing and interacting with on-line media collections using identifiers in media signals
US6577746B1 (en) 1999-12-28 2003-06-10 Digimarc Corporation Watermark-based object linking and embedding
EP0901282B1 (en) 1997-09-03 2006-06-28 Hitachi, Ltd. Method for recording and reproducing electronic watermark information
EP0921675B1 (en) * 1997-12-03 2006-07-05 Kabushiki Kaisha Toshiba Method of processing image information and method of preventing forgery of certificates or the like
US6804376B2 (en) 1998-01-20 2004-10-12 Digimarc Corporation Equipment employing watermark-based authentication function
JP3397680B2 (en) 1998-03-23 2003-04-21 株式会社東芝 Method for manufacturing conductive antireflection film and method for manufacturing cathode ray tube
JP2000155798A (en) * 1998-11-18 2000-06-06 Toshiba Corp Method and system for device control
US6608919B1 (en) * 1999-11-10 2003-08-19 Digimarc Corporation Method and apparatus for encoding paper with information
US6625297B1 (en) 2000-02-10 2003-09-23 Digimarc Corporation Self-orienting watermarks
US6804377B2 (en) 2000-04-19 2004-10-12 Digimarc Corporation Detecting information hidden out-of-phase in color channels
ES2356598T3 (en) * 2000-09-20 2011-04-11 Alpvision Sa PROCESS INTENDED TO PREVENT THE FALSIFICATION OR ALTERATION OF A PRINTED OR RECORDED SURFACE.
GB0025096D0 (en) * 2000-10-13 2000-11-29 Bank Of England Detection of printing and coating media
US6930759B2 (en) * 2003-09-23 2005-08-16 Eastman Kodak Company Method and apparatus for exposing a latent watermark on film
JP2006079448A (en) * 2004-09-10 2006-03-23 Konica Minolta Business Technologies Inc Data control method, data control device and data control server
JP4800420B2 (en) * 2007-05-31 2011-10-26 株式会社Ｐｆｕ Paper medium information encryption system, decryption system, program and method
US8023160B2 (en) * 2008-09-10 2011-09-20 Xerox Corporation Encoding message data in a cover contone image via halftone dot orientation
JP4875723B2 (en) * 2009-04-24 2012-02-15 シャープ株式会社 Image forming apparatus

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DE3229616A1 (en) * 1982-08-09 1984-02-09 Siemens AG, 1000 Berlin und 8000 München Method and circuit arrangement for superimposing graphical patterns and/or symbols
US4908873A (en) * 1983-05-13 1990-03-13 Philibert Alex C Document reproduction security system
US4709274A (en) * 1983-08-29 1987-11-24 Canon Kabushiki Kaisha Image processing apparatus
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Also Published As

Publication number Publication date
EP0554115A1 (en) 1993-08-04
US6166750A (en) 2000-12-26
CA2088235C (en) 2001-11-27
EP0554115B1 (en) 1999-04-07
DE69324290T2 (en) 1999-09-16
DE69324290D1 (en) 1999-05-12

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130128