The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2007
Filed:
Jun. 02, 2004
Takashi Otsuki, Kanagawa-ken, JP;
Takashi Otsuki, Kanagawa-ken, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method, apparatus, and program for image processing are provided to perform operations for generating an encoded image, detecting image alteration on the encoded image, and regenerating an original image from the encoded image. The encoded image is generated by an encoding apparatus, which inserts a redundant code into an LSB (least significant bit) bit-plane of the original image. The redundant code can be generated based on bit-planes other than the LSB bit-plane, using a CRC (cyclic redundancy check) method. A decoding apparatus recalculates a redundant code from the encoded image, and checks validity of the encoded image based on the extracted redundant code.