Systems Engineering and Electronics ›› 2023, Vol. 45 ›› Issue (1): 41-48.doi: 10.12305/j.issn.1001-506X.2023.01.06

• Electronic Technology • Previous Articles    

Frequency centroid zero watermarking algorithm based on Tetrolet transform of color image

Tianqi ZHANG, Shaopeng YE, Jianxing LIU, Haojun BAI   

  1. 1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
    2. Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2021-06-03 Online:2023-01-01 Published:2023-01-03
  • Contact: Shaopeng YE

Abstract:

In order to solve the problem that the transparency of traditional digital watermarking algorithms decreases with the increase of embedding strength, many zero watermarking algorithms have been proposed. However, most algorithms are not robust and stable, or are designed based on grayscale images. In this paper, a frequency centroid zero watermarking algorithm based on color image Tetrolet transform is proposed. The algorithm first extracts the luminance component of the color carrier image in the YCbCr space, then carries out the Tetrolet transform to obtain its low-frequency coefficients. Then through the block non-negative matrix decomposition, it uses the method of calculating the frequency centroid to construct the feature matrix. The watermark information is encoded by Polar code in turn, and the interleaving matrix is constructed by two-dimensional interleaving. Finally, the zero watermark is generated by exclusive OR (XOR) operation between the interleaved square matrix and the feature matrix containing watermark information. Simulation results show that the zero watermarking algorithm can effectively resist non-geometric attacks, geometric attacks and combination attacks, and the watermark extraction normalized coeffecient (NC) value is more than 0.9, with strong robustness, stability, and good practicability.

Key words: zero watermark, color image, Tetrolet transform, frequency centroid, robustness

CLC Number: 

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