Affiliations: [a]
College of Computer and Information Science, Southwest University, Chongqing, China
| [b]
College of Artificial Intelligence, Southwest University, Chongqing, China
Correspondence:
[*]
Corresponding author. Yu Zhang, College of Computer and Information Science, Southwest University, Chongqing, China. E-mail: zhangyuswu@163.com.
Abstract: The embedding capacity and steganography quality are two important performance indicators of data hiding which has practical application value for copyright and intellectual property protection, public information protection and online elections. Many researches presented hiding methods to improve the performance. However, the existing data hiding methods have problems such as low embedding capacity or poor stego-image quality. This paper proposes a new method (Single Pixel Modification, SPM) to improve the performance further. The SPM (Single Pixel Modification) method embeds k secret bits into a cover-pixel with the idea that minimizing the change to cover-pixel and adopting modulus operation based on 2k. The experimental results show that the proposed method has better performance than methods compared and the highest hiding capacity can reach 4 bits per pixel and the average PSNR of stego-images is 34.83 dB. The source code and related materials are made to public to make it easy for researchers to verify the work and stimulate further research.
Keywords: Data hiding, modulus calculation, cover image, stego-image
