Imperceptible Watermarking Technique using Arnold's Transform and Cross Chaos Map in DCT Domain

Adaptive Watermarking Algorithm in DCT Domain Based on Chaos

In order to improve the security, robustness and invisibility of the digital watermarking, a new adaptive watermarking algorithm is proposed in this paper. Firstly, this algorithm uses chaos sequence, which Logistic chaotic mapping produces, to encrypt the watermark image. And then the original image is divided into many sub-blocks and discrete cosine transform (DCT).The watermark information i...

Secured color image watermarking technique in DWT-DCT domain

The multilayer secured DWT-DCT and YIQ color space based image watermarking technique with robustness and better correlation is presented here. The security levels are increased by using multiple pn sequences, Arnold scrambling, DWT domain, DCT domain and color space conversions. Peak signal to noise ratio and Normalized correlations are used as measurement metrics. The 512x512 sized color imag...

Image watermarking using DCT domain constraints

DCT Domain Video Watermarking Technique for AVI Video

As the digital multimedia are integrated via the network, large amount of data is transfer and circulated easily and becoming faster, easier, and require less effort to make exact copies. This progress will benefit multimedia product owners as sales will increase. The major obstruction is the lack of effective intellectual property protection of digital media to put off unauthorized copying and...

A DCT Domain Visible Watermarking Technique for Images

The growth of computer networks has boosted the growth of the information technology sector to a greater extent. There is a trend to move from conventional libraries to digital libraries. In the digital libraries images and texts are made available through the internet for scholarly research. At the same time care is taken to prevent the unauthorized use of the images commercially. In some case...