A fuzzy controlled image watermarking based on a dual transform tehnique

الملخص EN

This paper presents a new watermarking technique using hybrid image transforms that aims to be very robust against attacks.

It also aims to reduce the amount of distortion created from embedding the watermark as much as possible, and have good capacity.

The proposed system uses a hybrid watermarking technique that is based on Non-Subsampled Contourlet Transform and Discrete Wavelet Transform.

In addition, the proposed system makes use of the fuzzy logic to automatically choose the strength of the embedded watermark.

Furthermore, the system uses Spread Spectrum Code Division Multiple Access to embed and recover the watermark after transforming the image.

To enhance recoverability of the watermarks, the system uses a high level of redundancy in the imbedding process, which allows a powerful Error Correcting Code to be used in the recovery process.

The fuzzy logic is used in the system to help the system in producing watermarked images that reserve their quality and not be heavily altered after embedding the watermark.

Experiments were performed to measure the quality of the proposed system using JPEG compression attacks.

The results showed that the proposed system is robust and has good capacity and imperceptibility although it suffers from being computationally complex.