Digital Watermarking Algorithm Based on CCC - FWHT Technique

Abstract

This paper proposes a watermarking algorithm to embed a watermark generated through Complete complementary code method into the original image by using Fast Walsh Hadamard Transform (FWHT) technique. Two valued kernels of Hadamard transformation cause smaller image information change during embedding compared to other transform domains. Spread spectrum communication systems use the spread sequences having good correlation properties. Complete complementary code (CCC) is a set of spread sequences, and has an ideal autocorrelation and cross correlation properties. This paper also discusses the watermark extraction procedure. It is found that the algorithm implementation on various 24 bit color images have proven that the strength of the algorithm is as required.