High-Capacity Image Steganography Based on Side Match Block Matching

Abstract

In this paper, we proposed an image steganography method which exploits a variant of block matching (BM) algorithm, called side match block matching (SMBM), and discrete wavelet transform (DWT) for embedding high-capacity images. The proposed method can greatly improve the embedding capacity by using SMBM. In addition, the proposed method resolves the problem with the loss of least significant bits in previous BM-based steganography methods and improves the confidentiality by embedding secret information in the DWT high frequency regions.