Digital Image Watermarking Algorithm Based on Wavelet Packet
In this paper, a method for Digital Image Watermarking based on the modification of certain subband of the wavelet packet decomposition was presented. A key is used for wavelet bases selection, watermark generation and selection of blocks for embedding the watermark bits. To efficiently embed the watermark within the images and provide the robustness for the watermark detection under attacks, watermark is embedded by quantizing the mean of the wavelet coefficient block. A method for exploiting human visual system (HVS) characteristics in wavelet packet domain is presented. In this method original image is not needed and only secret key is required for extracting the watermark. Experimental results show that proposed method is robust to different types of attacks.
Keywords: WaveletPacket, HVS, Weight Factor, Quantization, Robustness, Geometric Attacks.
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ABOUT THE AUTHORS
A. Geetha
completed B.E. during the year 1993 at Institute of Road and Transport Technology, Erode. Completed M.E. (Communication Systems) at Thiagarajar College of Engineering, Madurai. At present working as Assistant Professor ECE Department at Kamaraj College of Engineering & Technology, Virudhunagar. Her areas of interest include Digital Image Processing and Electronic Circuits. She is life member of Indian Society of Technical Education and Institution of Electronics and Telecommunication Engineers.
B.Vijayakumari
completed B.E. during the year 1997 at Institute of Road and Transport Technology, Erode. Completed M.E. (Communication Systems) at Thiagarajar College of Engineering, Madurai. Served as Lecturer at K.S.Rangasamy College of Technology for 3 years. Presently she is pursuing Ph.D in Biomedical Image Processing at Thiagarajar College of Engineering, Madurai. Her research interests include Image Processing and Digital Signal Processing.
C.Nagavani
completed B.E. during the year 2003 at Kamaraj college of Engineering and Technology, Virudhunagar.. Completed M.E. (Embedded System Technology)under Anna University ,Trichy. At present working as Assistant Professor ECE Department at Kamaraj College of Engineering & Technology, Virudhunagar. Her areas of interest include Digital Image Processing and Embedded systems. She is life member of Indian Society of Technical Education and Institution of Electronics and Telecommunication Engineers.
T.Pandiselvi
completed B.E. during the year 2003 at Kamaraj college of Engineering and Technology, Virudhunagar.. Completed M.E. (Communication systems) at Mepcoschlink Engineering College,Sivakasi. Served as Lecturer at Kalasalingam College of Engineering ,Srivilliputur for 3 years. At present working as Assistant Professor ECE Department at Kamaraj College of Engineering & Technology, Virudhunagar. Her areas of interest include Digital Image Processing and Digital signal Processing.
A. Geetha
completed B.E. during the year 1993 at Institute of Road and Transport Technology, Erode. Completed M.E. (Communication Systems) at Thiagarajar College of Engineering, Madurai. At present working as Assistant Professor ECE Department at Kamaraj College of Engineering & Technology, Virudhunagar. Her areas of interest include Digital Image Processing and Electronic Circuits. She is life member of Indian Society of Technical Education and Institution of Electronics and Telecommunication Engineers.
B.Vijayakumari
completed B.E. during the year 1997 at Institute of Road and Transport Technology, Erode. Completed M.E. (Communication Systems) at Thiagarajar College of Engineering, Madurai. Served as Lecturer at K.S.Rangasamy College of Technology for 3 years. Presently she is pursuing Ph.D in Biomedical Image Processing at Thiagarajar College of Engineering, Madurai. Her research interests include Image Processing and Digital Signal Processing.
C.Nagavani
completed B.E. during the year 2003 at Kamaraj college of Engineering and Technology, Virudhunagar.. Completed M.E. (Embedded System Technology)under Anna University ,Trichy. At present working as Assistant Professor ECE Department at Kamaraj College of Engineering & Technology, Virudhunagar. Her areas of interest include Digital Image Processing and Embedded systems. She is life member of Indian Society of Technical Education and Institution of Electronics and Telecommunication Engineers.
T.Pandiselvi
completed B.E. during the year 2003 at Kamaraj college of Engineering and Technology, Virudhunagar.. Completed M.E. (Communication systems) at Mepcoschlink Engineering College,Sivakasi. Served as Lecturer at Kalasalingam College of Engineering ,Srivilliputur for 3 years. At present working as Assistant Professor ECE Department at Kamaraj College of Engineering & Technology, Virudhunagar. Her areas of interest include Digital Image Processing and Digital signal Processing.
