FPGA Implementation of 4-D DWT and BPS based Digital Image Watermarking
Journal Title: INTERNATIONAL JOURNAL OF ENGINEERING TRENDS AND TECHNOLOGY - Year 2012, Vol 3, Issue 2
Abstract
In order to protect copyrighted material from illegal duplication, two typical technologies have been developed they are key-based cryptographic techniques and digital watermarks which enable the appropriate security during the transmission process. A digital image watermark consists of signing an image with a signature or copyright message and the message is secretly embedded in the image by using a computer algorithm, using the signature the watermarked image will be detected and extracted. In our paper, we propose a new technique of watermarking, combining both Discrete Wavelet Transform (DWT) and Bit-Plane Slicing (BPS)techniques. In the first unit, we decomposed the image to be watermarked in to four dimensional modified DWT coefficients, by adding pseudo-random codes at the high and middle frequency bands of the DWT of an image. In the second unit, a key has been generated from LHLH frequency bands of the 4-Level DWT image and this key is watermarked in to the original gray image. In the third unit, for data compression we used bit plane slicing technique where the original gray image is sliced in to 8 planes and we used bit plane 3 to embed in to the key watermarked image. The embedded key watermarked image is transmitted and the key watermarks are extracted with robustness. Using our technique, the processing time of the extraction of the watermark has been reduced and the peak signal-to-noise ratio (PSNR) value is improved. We implemented our technique using MATLAB and these units are simulated, synthesized and optimized for Spartan- 3EDB FPGA chips using Active-HDL Version 7.2SE design tools
Authors and Affiliations
S. Bhargav Kumar#1 , K. Esther Rani*2
Keywords
Related Articles
- EP ID EP135663
- DOI -
- Views 131
- Downloads 0
Approximating Number of Hidden layer neurons in Multiple Hidden Layer BPNN Architecture
Hidden layers plays a vital role in the performance of Back Propagation Neural Network especially in the case where problems related to arbitrary decision boundary to arbitrary accuracy with rational activation fun...
Communication in Vibrant Peer Groups For Cluster Key Management
In this paper we present an efficient way of group communication using key trees. group member can be formed as a tree structure and it is divided into global cluster and local clusters and group communication can...
A NEW ENTROPY ENCODING ALGORITHM FOR IMAGE COMPRESSION USING DCT
- Digital images contain large amount of information that need evolving effective techniques for storing and transmitting the ever increasing volumes of data. Image compression addresses the problem by reducing the...
Fabrication Of High Speed Indication And Automatic Pneumatic Braking System
As for the Indian road transport scenario is concerned, accidents are becoming a day to day cause an attempt has been made in this project to reduce such mishaps. In our project a high speed indication is given and autom...
Mechanical Behaviour of Friction Stir Welding Joints of Aluminium alloy of AA6351 with AA6351 and AA6351 with AA5083
Modern structural application demands reduction in both the weight and as well as cost of the fabrication and production of materials. Aluminium alloys are the best choice for the reduction of weight, cost and replacing...