Abstract:

An effective and robust image identification approach is proposed based on digital signature. In this method, after preprocessing of images, the first five digits of the average value of image block are extracted as the distinctive information of the image, which is different from other images. Then the image is divided into regions, and the extracted distinctive information of the regions is extended for the ReedSolomon (RS) error control coding. Finally, the digital signature, which is the randomly scrambled encode RS parity bit, is sent out together with the public image. Experiment results show that this image identification approach can effectively identify the authenticity of image content and locate the deliberate tampering.

Key words: image identification, RS encoding and decoding, tamper detection, tamper location