CHT-Domain Watermarking Technique for Still Images: Robust and Imperceptibility Analysis under Noise

2019 International Journal of Engineering and Advanced Technology  
In this article, a new frequency domain image watermarking scheme has been proposed, which uses Cosine Hyperbolic transformation for embedding propose. Due to vulnerability of watermarked image against noise interference, geometrical attacks and data modification attacks in a channel, many spatial and frequency domain approaches are less robust and imperceptible. In the proposed algorithm, multiple watermark images are embedded into host. During de-watermarking process, the multiple watermark
more » ... ultiple watermark images in bulk recovered watermark are combined to get resultant watermark image. Hence any modification in pixel values of watermark image can be retrieved. The resultant watermark image is subjected for various security tests and obtained results are better compared to other existing techniques. Compared to other existing frequency domain approaches, the algorithm utilizes very less execution time.
doi:10.35940/ijeat.b3712.129219 fatcat:m4nuz3lq4vdghewg42cuxuziji