Perceptually adaptive spread transform image watermarking scheme using Hadamard transform

  • Authors:

  • Santi P. Maity;Malay K. Kundu

  • Affiliations:

  • Dept. of Information Technology, Bengal Engineering and Science University, Shibpur, P.O. Botanic Garden, Howrah 711 103, India;Machine Intelligence Unit and Center for Soft Computing, Indian Statistical Institute, 203, B. T. Road, Kolkata 700 108, India

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2011

Quantified Score

Hi-index 0.07

Visualization

Abstract

The present paper proposes a digital image watermarking scheme using the characteristics of the human visual system (HVS), spread transform technique and statistical information measure. Spread transform (ST) scheme is implemented using the transform coefficients of both the host and the watermark signal. Watermark embedding strength is adaptively adjusted using frequency sensitivity, luminance, contrast and entropy masking of HVS model. The choice of Hadamard transform as watermark embedding domain offers several advantages, such as low loss in image information (higher image fidelity), greater reliability of watermark detection and higher data hiding capacity at high degree of compression. Performance of the proposed method is compared with a number of recently reported watermarking schemes based on spread spectrum (SS) and quantization index modulation (QIM).