A high‐capacity and low‐distortion 3D polygonal mesh steganography using surfacelet transform

Steganography is the science and art of communicating secret data in an appropriate multimedia cover. Steganography's ultimate concerns are undetectability, robustness, and capacity of data hiding. Three‐dimensional (3D) meshes have been used more and more in industrial, medical, and entertainment applications during the last decades. In this paper, a high‐capacity and very‐low‐distortion 3D mesh steganography scheme based on novel directional N‐dimensional surfacelet transform is proposed. Experimental results show that the cover model distortion is very low. This novel approach can provide a much higher hiding capacity and lower distortion than existing approaches in the transform domain, at the same time, observing the main steganographic factors on 3D models.