A Simple Image Tamper Detection and Recovery Based on Fragile Watermark with One Parity Section and Two Restoration Sections

Chao-Ming Wu,Yan-Shuo Shih

doi:10.4236/opj.2013.32b026

Abstract

A fragile self-recovery watermarking scheme with simple and effective tamper detection capability is proposed in this paper. In conventional fragile watermark for tamper detection and recovery, the parity section of the watermark is used for tamper detection and the restoration section of the watermark is used for image recovery, separately. In addition, to provide second chance for block recovery in case one copy is destroyed, Lee and Lin proposed dual watermarking scheme in which two copies of restoration watermark are embedded. In the proposed new scheme, fragile watermark with one parity section and two restoration sections are embedded, too. In addition to the second chance for image restoration, the two restoration sections as well as the parity section are all used for tamper detection. Experimental results show that the tamper detection capability is superior to other techniques.

Highlights

In recent years, the image authentication is an interesting research topic since multimedia data in digital format can be modified or tampered with ease using a lot of image processing tools, whether it is malicious or not
In conventional fragile watermark for tamper detection and recovery, the parity section of the watermark is used for tamper detection and the restoration section of the watermark is used for image recovery, separately
Numerous experiments are conducted to demonstrate the effectiveness of the proposed self-recovery fragile watermarking scheme

Summary

Introduction

The image authentication is an interesting research topic since multimedia data in digital format can be modified or tampered with ease using a lot of image processing tools, whether it is malicious or not. Several self-recovery watermarking schemes have been proposed [2,3,4, 6] These schemes embed image block features as a watermark payload of a different image block (or blocks). To improve the recovery quality, Lee and Lin [3] proposed a dual-watermarking method. This scheme maintains two watermark copies of the whole image and provides a sec-. Ond chance for block recovery in case one copy is destroyed He et al [2] presented the performance analysis of a self-recovery fragile watermarking scheme employing an optimized neighborhood characterization method to detect the tampering.

Block-Based Watermark Embedding

Tamper Detection Strategies

Image Recovery

Experimental Results

Conclusions