Image processing apparatus, image processing method, and storage medium

• US 6,721,438 B1
• Filed: 03/28/2000
• Issued: 04/13/2004
• Est. Priority Date: 03/30/1999
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ishida, Yoshihiro, Iwamura, Keiichi, Makita, Takeshi
• Primary Examiner(s): Johns, Andrew W.
• Assistant Examiner(s): NAKHJAVAN, SHERVIN K
• Application Number:
  US09/536,457
• Time in Patent Office: 1,477 Days
• Field of Search: 382/100, 382/232, 380/203, 380/210, 380/241, 713/176, 713/178, 713/179, 348/460, 348/211.5, 348/211.6, 725/21
• US Class Current: 382/100
• CPC Class Codes: G06T 1/0028 Adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
• CPC Class Codes: H04N 1/32154 Transform domain methods H04N1/32309 takes precedence
• CPC Class Codes: H04N 1/32165 using cosine transforms
• CPC Class Codes: H04N 1/32187 with selective or adaptive application of the additional information, e.g. in selected frequency coefficients

Abstract

A deterrent effect for a forgery of an image can be provided and both of the protection of a picture quality of an image of a relatively low similarity and the prevention of a forgery of an image of a relatively high similarity can be realized. For this purpose, an image processing apparatus has embedding processing means for embedding predetermined information which can specify an output apparatus and an output date/time as a digital watermark having a resistance according to a similarity with a specific image 106 into an output image, thereby enabling the deterrent of a forgery of the specific image 106 according to the similarity to be realized while outputting an image which the operator intends to output.

Claims

1. An image processing apparatus comprising:

input means for inputting image information;

discriminating means for discriminating a similarity between said image information and a specific image; and

embedding means for embedding a digital watermark having higher resistance in proportion to an increase of said similarity, into said image information.

2. An apparatus according to claim 1, wherein said resistance changes due to said digital watermark embedding method or said resistance parameter.

3. An apparatus according to claim 1, wherein said digital watermark includes a watermark which is embedded into a space region and a watermark which is embedded into a frequency region.

4. An apparatus according to claim 1, wherein said specific image includes a bill or securities.

5. An image processing method comprising:

an input step of inputting image information;

a discriminating step of discriminating a similarity between said image information and a specific image; and

an embedding step of embedding a digital watermark having higher resistance in proportion to an increase of said similarity, into said image information.

6. A computer-readable storage medium which stored an image processing program, wherein said program comprises:

an input step of inputting image information;

a discriminating step of discriminating a similarity between said image information and a specific image; and

an embedding step of embedding a digital watermark having higher resistance in proportion to an increase of said similarity, into said image information.