A Robust Watermarking Technique in Geometric Distortion of Digital Image

Abstract

Generally, existing watermarking techniques are fragile in geometric distortion and have difficulty in detecting artificial manipulation of digital data. In this paper, we propose a robust watermarking technique in geometric distortion of digital images. The proposed watermarking technique embeds the watermark by modifying phase information in the complex wavelet domain about an original image. A watermark is extracted with a hierarchical from a watermarked image, and a correlation is compared. The watermarking technique us-ing the Complex Wavelet Transform is compared with the watermarking technique which uses the existing wavelet transformation was used for performance evaluation, and proposed techniques showing a robust on a geometric distortion