A Computational Approach to Edge Detection
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Contrast-Sensitive Visible Watermarking Scheme
IEEE MultiMedia
Adaptive Visible Watermarking of Images
ICMCS '99 Proceedings of the IEEE International Conference on Multimedia Computing and Systems - Volume 2
Digital Watermarking and Steganography
Digital Watermarking and Steganography
A contrast-sensitive reversible visible image watermarking technique
IEEE Transactions on Circuits and Systems for Video Technology
A secure partition-based document image watermarking scheme
International Journal of Information and Computer Security
Secure spread spectrum watermarking for multimedia
IEEE Transactions on Image Processing
Reversible Visible Watermarking and Lossless Recovery of Original Images
IEEE Transactions on Circuits and Systems for Video Technology
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A novel approach for adaptive visible watermarking algorithm using Hadamard transformation technique is proposed in this paper for copyright protection of digital images. In this work, watermark is inserted into luminance component of a cover image and hence the proposed scheme could be used for both colour and monochrome images. In order to maintain quality of the given cover image as well as the visibility of inserted watermark, calculation of scaling and embedding factors is automated using the content of cover image. The performance of the proposed watermarking algorithm is tested with different types of greyscale/colour images and the results show the efficiency of the proposed work. The visibility of embossed watermark is evident from the results obtained without much degradation in quality of the underlying cover image. The statistical observations further strengthen the claim.