Reliable detection of BPCS-steganography in natural images

Image steganalysis has attracted increasing attention recently. BPCS steganalysis is currently a hot research topic. Although some BPCS steganalysis methods have been proposed, these methods have their limitations. In this paper, we propose a new approach to detect BPCS-steganography. The approach, based on statistical features, can detect the existence of secret message not only in spatial domain, but also in transform domain. To evaluate the proposed steganalytic framework, two examples of detection are performed. It is shown that the accuracy of detection of the existence of secret message in images is relatively high. Experimental results and theoretical analysis show that the proposed method is an effective steganlytic method of BPCS-steganography.