Method of preventing falsification of image

• US 20020051577A1
• Filed: 10/19/2001
• Published: 05/02/2002
• Est. Priority Date: 10/20/2000
• Status: Abandoned Application

• Current Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Kinjo, Naoto
• Application Number:
  US09/981,920
• Publication Number:
  US 20020051577A1
• Time in Patent Office: Days
• US Class Current: 382/218
• CPC Class Codes: G06T 1/0028 Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
• CPC Class Codes: G06T 2201/0081 whereby both original and watermarked images are required at decoder, e.g. destination-based, non-blind, non-oblivious

Abstract

This invention relates to a method of preventing falsification of an image of a produced image produced in an imaging apparatus, comprising the steps of: extracting a first image characteristic amount by a specified algorithm from the produced image in the imaging apparatus, recording identification information of the produced image in the imaging apparatus and the image characteristic amount into a database of an authentication section which authenticates a status that there is no falsification in the produced image; regarding as an authentication object image whose authentication is requested to the authentication section, extracting a second image characteristic amount by the specified algorithm from said authentication object image; comparing the first image characteristic amount with the second image characteristic amount in which the first image and the second image has the same identification information; and judging whether or not the authentication object image is falsified after the image production, based on consistency between the first and second image characteristic amounts acquired from the comparison in order to prevent the falsification of the produced image based on the judgment.

Claims

1. A method of preventing falsification of an image of a produced image produced in an imaging apparatus, comprising the steps of:

extracting a first image characteristic amount by a specified algorithm from said produced image in said imaging apparatus;

recording identification information of said produced image in said imaging apparatus and said first image characteristic amount into a database of an authentication section which authenticates a status that there is no falsification in said produced image;

regarding as an authentication object image whose authentication is requested to said authentication section, extracting a second image characteristic amount by said specified algorithm from said authentication object image;

comparing said first image characteristic amount with said second image characteristic amount, in which said extracted authentication data and said authentication data recorded in said database have the same identification information,; and

judging whether or not said authentication object image is falsified after said image production, based on consistency between said first and second image characteristic amounts acquired from said comparison in order to prevent said falsification of said produced image based on said judgment.

2. The method according to claim 1, wherein said imaging apparatus has a camera, in which said produced image is a photographic image photographed by said camera, in which said identification information is an identification information or said camera or a file name of said photographic image or an identification information a photographer of said photographic image.

3. The method according to claim 1, wherein said imaging apparatus has a computer in which said produced image is a computer graphics image produced by said computer or an image which has been image-processed by said computer, and said identification information is an identification information of said computer or a file name of said produced image, or an identification information of a producer of said produced image.

4. A method of preventing falsification of a produced image produced in an imaging apparatus, comprising the steps of:

producing an image to acquire a first image data of the produced image in said imaging apparatus,

recording identification information for identifying said produced image by said imaging apparatus and said first image data of said produced image by said imaging apparatus into a database in an authentication section which authenticates that there is no falsification in said produced image,

comparing a second image data of authentication object image which has been requested to be authenticated by said authentication section, with said first image data recorded in said databases in the said authentication section, in which said extracted authentication data and said authentication data recorded in said database have the same identification information, and

judging whether or not said authentication object image is falsified after said image production, based on consistency between said first and second image characteristic amounts acquired from said comparison in order to prevent said falsification of said produced image based on said judgment.

5. The method according to claim 4, wherein said imaging apparatus has a camera, in which said produced image is a photographic image photographed by said camera, and said identification information is an identification information of said camera or a file name of said photographic image or an identification information of a photographer of said photographic image.

6. The method according to claim 4, wherein said imaging apparatus has a computer, in which said produced image is a computer graphics image produced by said computer or an image which has been image-processed by said computer, and information of said computer or a file name of said produced image or an identification information of a producer of said produced image.

7. A method of preventing falsification of a produced image produced in an imaging apparatus, comprising the steps of:

sending authentication data from an authentication section for authenticating a status that there is no falsification in a produced image which is produced by said imaging apparatus to said imaging apparatus,

recording said authentication data and identification information for identifying said produced image of said imaging apparatus into a database in said authentication section,

attaching said authentication data to said produced image or embedding said authentication data into said produced image, when said imaging apparatus produces said produced image,

extracting said authentication data from an authentication object image which has been requested to be authenticated in said authentication section,

comparing said extracted authentication data with said authentication data recorded in said database, in which said extracted authentication data and said authentication data recorded in said database have the same identification information, and

judging whether or not said authentication object image is falsified after said image production, based on consistency between said extracted authentication data and said authentication data acquired from said comparison in order to prevent said falsification of said produced image based on said judgment.

8. The method according to claim 7, wherein said imaging apparatus has a camera, in which said produced image is a photographic image photographed by said camera, and said identification information is an identification information of said camera or a file name of said photographic image or an identification information of a photographer of said photographic image.

9. The method according to claim 7, wherein said imaging apparatus has a computer, in which said produced image is a computer graphics image produced by said computer or an image which has been image-processed by said computer, and said identification information is an identification information of said computer or a file name of said produced image or an identification information of producer of said produced image.