CT-SVD and Arnold Transform for Secure Color Image WatermarkingAM Publications,India
Watermarking is used for protecting copyright of digital images. In this paper, we propose a novel technique for watermarking using Contourlet Transform (CT) and Singular Value Decomposition (SVD). CT ensures imperceptibility of the watermark and SVD ensures its robustness against attacks. Arnold transform is used for scrambling watermark pixels to ensure watermark security. Watermark extraction is semi-blind, which avoids the need for original image for extraction. Both watermark and cover image are color images. Performance of the system is judged by using PSNR and Correlation Coefficient (CC) values. System shows good robustness against noise, JPEG compression, filtering and cropping
CT-SVD and Arnold Transform for Secure Color Image WatermarkingAM Publications,India
Watermarking is used for protecting copyright of digital images. In this paper, we propose a novel technique for watermarking using Contourlet Transform (CT) and Singular Value Decomposition (SVD). CT ensures imperceptibility of the watermark and SVD ensures its robustness against attacks. Arnold transform is used for scrambling watermark pixels to ensure watermark security. Watermark extraction is semi-blind, which avoids the need for original image for extraction. Both watermark and cover image are color images. Performance of the system is judged by using PSNR and Correlation Coefficient (CC) values. System shows good robustness against noise, JPEG compression, filtering and cropping