Multi-resolution Image Authentication Watermarking Based on Progressive Image Transmission

In this paper, a watermarking for multi-resolution image authentication is proposed. The most important image content with progressive characteristic is taken as the authentication code. The authentication code is then embedded/extracted according to multi-resolution image coding. The experimental results show the validity of the proposed scheme. The significant tampering can be detected firstly and slight tampering is detected in the later authentication stages. Furthermore, the positions of the tampered areas can be located correctly.