Face Obfuscation Based Reversible Watermarking for Tamper Proof Iradication

Abstract

This paper proposes a 'Reversible de-identification for tamper proof iradication' using Integer Wavelet Transform that satisfies the requirements of imperceptibility, capacity, and robustness. De-Identification is nothing but a process which is used to ensure privacy by concealing the identity of individuals captured by video surveillance systems. Reversible watermarking also called lossless data hiding it is a method of hiding secret data into cover media, such as digital images, videos, audios, etc. and it enables marked media to be restored to their original form without any distortion. Several reversible watermarking methods have been proposed but one of the important challenge is to make the obfuscation process reversible so that the original image/video can be recovered by persons in possession of the right security credentials. This paper presents a novel Reversible De-Identification method which can be used in conjunction with any other obfuscation process. To reverse the obfuscation process. The residual information needed is compressed, authenticated, encrypted and embedded within the obfuscated image using a twolevel Reversible Watermarking scheme.