Title:
ALTERATION DETECTION INFORMATION GENERATING APPARATUS, IMAGING APPARATUS, ALTERATION DETECTION INFORMATION GENERATING METHOD, PROGRAM, AND STORAGE MEDIUM
Document Type and Number:
Japanese Patent JP2008022373
Kind Code:
A
Abstract:
To rapidly generate an alteration detection digest value associated with an image data file of a large size.
In an alteration detection information generating apparatus, a hash arithmetic section 206 applies hash arithmetic operations to aggregated image data in the unit of a plurality of image data included in aggregated image file data in the unit of a plurality of image file data stored in a memory means. Or the hash arithmetic section 206 applies hash arithmetic operations to only part of the image data file to reduce the arithmetic time.
Inventors:
HIRAI YUICHI
Application Number:
JP2006193232A
Publication Date:
January 31, 2008
Filing Date:
July 13, 2006
Export Citation:
Assignee:
CANON KK
International Classes:
H04N1/387; G09C1/00; H04L9/32; H04N5/225
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura