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RESEARCH ON THE LOSS-LESS COMPRESSION ALGORITHM OF THE ULTRASONIC TESTING OF RAIL

Shuai-yuan LI  Guo-xuan LIAN  Zhao-bin PENG  
【摘要】:A large amount of data is produced in the process of ultrasonic testing of rail,and it's necessary to compress the raw data with a loss-less compression algorithm.This paper analyses statistical characteristics of ultrasonic test data of rail,and makes researches on the commonly used loss-less compression algorithm,Huffman compression algorithm and LZW compression algorithm.In order to improve the performance of compression,this paper designs and implements a new loss-less compression algorithm based on the above analysis and then tests the new algorithm with a number of ultrasonic test data files of rail.The test results show that the new algorithm has a relatively high compression ratio and the compression performance is significantly better than Huffman compression algorithm and LZW compression algorithm.

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