Digital Watermarking for Volume Data Based on 3D-DWT

摘要

With the rapid development of computer multimedia, how to protect digital products from being copied, pirated and juggled has been an urgent issue in the information security field. Digital watermarking is a new method to solve the referred problems. This paper proposes a digital watermarking algorithm for volume data based on three-dimension discrete wavelet transform (3D-DWT) and spread-spectrum communication technique. The embedded watermark is invisible and withstands the common attacks such as cropping, adding noise, and filtering. The validity of proposed algorithm has been confirmed with experiments.