Robust color image watermarking and web-tracing system using digitail wavelet transform and mobile agents

الملخص EN

This paper describes a complete system for watermarking and web tracing of color images.

The watermark system uses DWT (Discrete Wavelet Transform) that gives the watermark a significant robustness and invisibility.

The watermarking system is applied to color images by converting color coding from RGB to YUV space, and applying the watermark on V channel.

The system adopts blind detection model that depends on SIFT (Scale invariant feature transform) algorithm for watermark embedding and extraction.

These points are used as reference points in both phases (embedding and extraction), because of their high stability against possible attacks.

The system is also able to trace images on the web, using watermark mobile agents, sent by the watermark agency to every connected node, contracted with the agency, in order to examine the stored files in them.

This system is very efficient in dealing with large-size images across congested networks.

It uses blind-model based detection to improve tracing system performance, so that the agent doesn't have to “carry” the original image through its navigation.

A portal is also implemented to ensure simple and easy-to-use services.-