A Digital Image Watermark Algorithm Based on DC Coefficients Quantization

Author

Zhao, Yanling ; Zheng, Xiaoshi ; Li, Na ; Liu, Guangqi ; Wang, Qingxi

Author_Institution

Shandong Comput. Sci. Center

Volume

2

fYear

0

fDate

0-0 0

Firstpage

9734

Lastpage

9738

Abstract

Digital watermark technology is an efficient way to copyright protection. First, DCT coefficients characteristics were analyzed. Then, a new watermark technique quantization was proposed. According to watermark information, DC coefficients of each 8times8 block were modulated in DCT matrix. And an adaptive method was given to obtain quantization distance. The experiments show it does well in transparency and robustness. It can resist against JPEG compression, cut and common image attacks efficiently

Keywords

copyright; discrete cosine transforms; image coding; vector quantisation; watermarking; JPEG compression; copyright protection; digital image watermark; discrete cosine coefficient quantization; discrete cosine transform matrix; watermark information; Computer science; Copyright protection; Digital images; Discrete cosine transforms; Image coding; Quantization; Resists; Robustness; Transform coding; Watermarking; DC coefficient; Discrete Cosine Transform (DCT); digital watermark; quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on

Conference_Location

Dalian

Print_ISBN

1-4244-0332-4

Type

conf

DOI

10.1109/WCICA.2006.1713894

Filename

1713894