High-Capacity Image Steganography Based on Discrete Hadamard Transform
Yingqian Zhang, Kuan Zhong, Xingyuan Wang
Abstract
High capacity and high imperceptibility are the primary targets for ideal image steganography. For the traditional transform-based schemes, the main challenge is to balance the imperceptibility, hiding capacity, and running efficiency. To obtain a high-quality image in dense embedding, existing high-capacity schemes usually sacrifice running efficiency and security. These disadvantages make the schemes less appealing. In this paper, based on a lightweight transform Discrete Hadamard Transform (DHT), we introduce a simple but high-performance image steganographic model. In the case of only stego-image passed, the experiment results demonstrate that the proposed scheme achieves high imperceptibility and security even in the dense embedding of 8 BPP (Bits Per Pixel). Furthermore, the proposed scheme withstands various tests and shows desirable robustness. The comparative analyses are demonstrated that our scheme is efficient and feasible image steganography.