A New Method For Digital Watermarking Based on Combination of DCT and PCA

TL;DR

This paper introduces a novel digital watermarking technique combining DCT and PCA transforms, enhancing robustness, capacity, and image quality compared to existing DCT-based methods.

Contribution

It proposes a new watermarking method that integrates DCT and PCA, improving robustness and capacity while maintaining image quality.

Findings

The method is more robust against attacks.

It increases watermark capacity.

It preserves cover image quality.

Abstract

In the digital watermarking with DCT method,the watermark is located within a range of DCT coefficients of the cover image. In this paper to use the low-frequency band, a new method is proposed by using a combination of the DCT and PCA transform. The proposed method is compared to other DCT methods, our method is robust and keeps the quality of cover image, also increases capacity of the watermarking.