Reversible authentication scheme for demosaicked images without false detection

Abstract

The integrity of an image transmitted over the Internet is easily breached, and as such, research into image authentication has become increasingly urgent. In this paper, a new efficient fragile watermark- based authentication scheme for demosaicked images is proposed. In the proposed scheme, each watermark bit is embedded into two rebuilt components of each demosaicked pixel by using a designed authentication table. The watermarked image can be recovered back to the original demosaicked image if necessary. The experimental results demonstrated that our method preserves very satisfactory image quality and tamper detection accuracy. Most important, there was no false detection in the proposed scheme.