A new method for color image watermarking based on combination of DCT and PCA

Author

Abolfazl Hosseini, S. ; Saboori, Arash

Author_Institution

Dept. of Commun., Islamic Azad Univ., Tehran, Iran

fYear

2015

fDate

17-19 Feb. 2015

Firstpage

1

Lastpage

5

Abstract

In the digital watermarking with DCT method, the watermark is located within a range of DCT coefficients of the cover image. In this paper a new method is proposed by using a combination of the DCT and PCA transform in order to use the low-frequency band for the color image. First, the digital color image is transformed into YCbCr from RGB color space and the luminance (Y) component is divided into non-overlapping blocks and the low-band coefficients of each block are placed in the matrix data, the PCA transform will be applied to it. The watermark is embedded in the first component of the PCA. The proposed method is compared to other DCT methods. Our method is robust and keeps the quality of the cover image, also increases capacity of the watermarking.

Keywords

discrete cosine transforms; image colour analysis; image watermarking; matrix algebra; principal component analysis; DCT coefficients; DCT combination; DCT method; DCT transform; PCA combination; PCA transform; RGB color space; YCbCr transform; color image watermarking; digital color image; digital watermarking; matrix data; Discrete cosine transforms; Image color analysis; PSNR; Principal component analysis; Robustness; Transform coding; Watermarking; Color image; DCT; Digital watermarking; PCA transform; YcbCr color space; low-frequency band;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Signal Processing, and their Applications (ICCSPA), 2015 International Conference on

Conference_Location

Sharjah

Type

conf

DOI

10.1109/ICCSPA.2015.7081310

Filename

7081310