Bandwidth Efficient Digital Image Watermarking Scheme Using a Concatenation of Three Transforms

Abstract

Digital watermarking is a preliminary task of ingraining data into digital forms such as visual , audio-visual as well as audible data which helps to identify possessorship of those data. This technique is useful for copyright protection, tamper-resistant, theft-intimidation etc. it should be fixed in such a way that naked eye cannot bring into the mind & hard to eliminate, as growth of technologies in the digital side is becoming wider and wider chances of clone copies is added. The trending research field in current times is ensuring the penetration of  data so that minor party cannot hold it. This paper covers an algorithm for black and white (binary) digital image watermarking mechanism based upon discrete wavelet transform, singular value decomposition and DCST.  In this proposed watermarking algorithm, the proprietory image is compressed in the beginning and then watermarking process is carried out. The required bandwidth and storage capacity for image data will be reduced during transmission due to the applied compression before watermarking. The sturdiness of both host image as well as watermark image is tested along with DCST using respective performance measures. Finally, the performance of DCST based watermarking implementation has been compared with existing algorithm based on DOST.   Comparative analysis has been carried out in presence of white Gaussian noise attack. The results show that, the performance and achievements of the presented algorithm is superior in comparison to the extant DOST based algorithm.