DIFFERENTIAL HISTOGRAM-BASED REVERSIBLE WATERMARKING METHOD THROUGH ROW-COLUMN CROSS SCANNING

PURPOSE: A differential histogram based reversible watermarking method by row-column cross scanning is provided to obtain a high insertion capacity by efficient repetitive insertion while maintaining low distortion with complete reversibility. CONSTITUTION: If R is an odd number for an original imag...

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Bibliographic Details
Main Authors YEO, DONG GYU, LEE, HAE YEOUN
Format Patent
LanguageEnglish
Korean
Published 10.10.2012
Subjects
ADVERTISING
CALCULATING
CODING OR CIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHERPURPOSES INVOLVING THE NEED FOR SECRECY
COMPUTING
COUNTING
CRYPTOGRAPHY
DISPLAY
EDUCATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEALS
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Summary:PURPOSE: A differential histogram based reversible watermarking method by row-column cross scanning is provided to obtain a high insertion capacity by efficient repetitive insertion while maintaining low distortion with complete reversibility. CONSTITUTION: If R is an odd number for an original image, row major scanning is performed on the original image. If R is an even number, column major scanning is performed on the original image. A differential histogram is gradually formed. Bins not used for insertion are shifted to obtain an insertion space. The differential histogram is modified according to a bit of an insertion target message. A message is inserted by modifying the differential histogram. [Reference numerals] (AA) ROUND input; (BB) R is an odd number?; (CC) Row priority scanning; (DD) Column priority scanning; (EE) Message is inserted by modifying histogram.
Bibliography:Application Number: KR20110029694