A Scheme for Tamper Detection by Image Watermarking

Abstract

This study proposes inattentive image watermarking scheme for tamper detection. By comparing pixel channel values of the image, the scheme endows to distinguish tamper attacks such as blurring, replacing, adding features from non - tamper regions out coming from general image processing operations. This technique can be implemented with small memory and computational requirements, which makes it potentially useful for hardware implementation in digital cameras. The scheme works by increasing the pixel value of odd number of an each pixel channel by one and embedding the hidden data value into the base image, robust watermark that sensitively depends on a secret key. The technique of watermarking method is designed based on Least Significant Bit algorithm. To achieve of finding the tamper region on the tampered image, this study proposed the inverse extraction procedure that extracts the watermark region and tampered region on the testing image.