Title :
Semi-fragile Watermarking Technique for Image Tamper Localization
Author :
Zhou Hao ; Li, Haiyan ; Yu, Pengfei
Author_Institution :
Inf. Sch., Yunnan Univ., Kunming, China
Abstract :
In this paper an image authentication scheme is proposed to locate tampered area correctly and accurately on the watermarked image. Semi-fragile watermarks are extracted from detail coefficients of wavelet transform and embedded into DCT coefficients. In order to enhance the security, chaotic sequence is employed to encrypt the watermark signals. Experimental results show the proposed technique is robust against JPEG lossy compression and noise pollution.
Keywords :
cryptography; data compression; image coding; watermarking; DCT coefficients; JPEG lossy compression; encryption; image authentication scheme; image tamper localization; security enhancement; semifragile watermarking technique; wavelet transform; Authentication; Chaos; Cryptography; Discrete cosine transforms; Image coding; Noise robustness; Security; Transform coding; Watermarking; Wavelet transforms; DCT; JPEG-lossy; Keywords-Semi-fragile; tamper localization; watermarking;
Conference_Titel :
Measuring Technology and Mechatronics Automation, 2009. ICMTMA '09. International Conference on
Print_ISBN :
978-0-7695-3583-8
DOI :
10.1109/ICMTMA.2009.110
