Image compression by backpropagation algorithm

IV IMAGE COMPRESSION BY BACKPROPAGATION ALGORITHM Mustafa Tosun Electric-Electronic Engineering Ms. thesis, 1997 Supervisor: Yrd. Doc. Dr. M. Ali Ebeoğlu SUMMARY Communication technologies are developed in information age. This is raised up the communicating between human and societies. Therefore, it is necessary using the communicatior. channel succesfuly. Compression techniques are real solutions of this problem In This study, basic information about lossy and lossless data compression techniques has been given. Minimum redundancy coding, arithmetic coding and ran length coding techniques have been analysed. Vector quantisation technique has been considered. Detailed information has been given about image compression technique by backpropagation neural network and realised the algorithm of this study. This algorithm has been succeeded by 4:1 compression ratio with 3% error. Keywords: Image compression, Signal processing, vector quantisation, neural network, backpropagation algorithm.