TITLE:
A New Robust Color Image Watermarking Scheme Based on 3D-DCT
AUTHORS:
Xiangguang Xiong
KEYWORDS:
Color Image Watermarking, Three Dimensional Discrete Cosine Transform (3D-DCT), Quantitative Method, Robustness
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.3 No.3C,
October
23,
2015
ABSTRACT: In this paper, for color image copyright
protection application, a new and blind color image watermarking algorithm
based on quantitation method in three dimensional discrete cosine transform
(3D-DCT) is proposed. Firstly, the original RGB color image is divided into
non-overlapping blocks sized 8 × 8 × 3, and then performs 3D-DCT transform on
each block. Secondly, embed a bit watermarking signal into each block’s 3D-DCT
direct-current (DC) coefficient by quantization method. The results show that
the proposed scheme has very good imperceptibility and robustness against the
common image processing attacks. Compared with similar algorithm, the proposed
scheme has better robustness performance for most attacks.