A zero-watermarking algorithm for digital map based on DWT domain

Abstract

This paper presents a zero-watermarking algorithm for grid map based on wavelet transform. The algorithm of grid map data block to do a two-dimensional wavelet transform, the histogram information of wavelet coefficients extracted features as watermark information. Experimental results show that the algorithm of grid digital map with the general attack is robust, and grid digital map data does not make any alteration, has good practical value. © 2012 Springer Science+Business Media B.V.