An algorithm for watermarking mobile phone colour images using BCH code

Abstract

This paper proposes a scheme for embedding phone numbers into color images captured by a mobile phone camera. Firstly, the phone number digits are transformed using BCD encoder and the generated binary vector is appended by the phone number checksum represented in binary format. Then, this binary vector is coded by BCH code before inserting it in the DCT blocks of the image. The coded watermark information are embedded into a predefined low frequency coefficient in the DCT domain. The robustness of the scheme is assessed by using “Stirmark” software package. The new algorithm survived JPEG compression and 3×3 2D filtering.