Improved wavelet-based image watermarking through SPIHT

Abstract

This paper presents an improved watermarking algorithm using discrete wavelet transform (DWT), discrete cosine transforms (DCT) and singular value decomposition (SVD). Further, robustness and security of algorithm is enhanced by set partitioning in hierarchical tree (SPIHT) and Arnold transform, respectively. The experimental results evident that proposed method is imperceptible and robust against various form of attacks and found superior to other similar technique under consideration.