Title:
DIGITAL WATERMARK EMBEDDING AND EXTRACTING METHOD
Document Type and Number:
Japanese Patent JP2023068677
Kind Code:
A
Abstract:
To obtain a digital watermark method which has print and scan resistance and correctly extracts watermark information even when it is printed in a curved surface.SOLUTION: Image data is divided into a plurality of blocks, and bit information is multiplexed by using two different kinds of digital watermark embedding techniques for each block, and the bit information is embedded. Extraction of a watermark from the embedded image obtains a high percentage of a correct answer by calculating the embedded bit information and its reliability from each digital watermark method and selecting the highly reliable watermark information.SELECTED DRAWING: Figure 1
Inventors:
KAWAMURA NAOTO
Application Number:
JP2021179878A
Publication Date:
May 18, 2023
Filing Date:
November 03, 2021
Export Citation:
Assignee:
KAWAMURA NAOTO
International Classes:
H04N1/32; G06T1/00