A 3D Model Authentication Algorithm Based on Reversible Watermarking

This paper proposes a 3D model authenticate algorithm. Tamper detection, tamper localization and recovery can be achieved. The tamper detection is achieved by fragile watermarking under a precision limit. The tamper localization is achieved by partitioning the model into several authentication units (AU). The robust features are chosen since they are invariant after watermark embedding. Data is embedded by modulating the x-coordinate values of some selected vertices according to a certain order. Furthermore, the portion of the model which is not illegally modified can be recovered perfectly using reversible watermarking technique. Experimental results demonstrate the effectiveness of the proposed authentication algorithm.