无损检测
無損檢測
무손검측
NONDESTRUCTIVE TESTING
2015年
8期
21-25,66
,共6页
超声检测%数据压缩%整数小波变换%阈值处理
超聲檢測%數據壓縮%整數小波變換%閾值處理
초성검측%수거압축%정수소파변환%역치처리
Ultrasonic flaw detection%Data compression%IWT%Threshold process
针对一代小波变换阈值压缩算法实现复杂、实时性差且存在浮点系数等问题,提出了一种基于整数小波变换的机车轮对超声检测数据阈值压缩算法,从阈值函数和非零系数位置标记两个方面对传统阈值压缩方式进行了优化,并与传统阈值压缩方式和基于一代小波变换的阈值压缩算法的压缩效果进行了对比。结果表明:该算法在超声检测数据的压缩中能够获得更高的压缩倍数和重构精度,具有良好的应用前景。
針對一代小波變換閾值壓縮算法實現複雜、實時性差且存在浮點繫數等問題,提齣瞭一種基于整數小波變換的機車輪對超聲檢測數據閾值壓縮算法,從閾值函數和非零繫數位置標記兩箇方麵對傳統閾值壓縮方式進行瞭優化,併與傳統閾值壓縮方式和基于一代小波變換的閾值壓縮算法的壓縮效果進行瞭對比。結果錶明:該算法在超聲檢測數據的壓縮中能夠穫得更高的壓縮倍數和重構精度,具有良好的應用前景。
침대일대소파변환역치압축산법실현복잡、실시성차차존재부점계수등문제,제출료일충기우정수소파변환적궤차륜대초성검측수거역치압축산법,종역치함수화비령계수위치표기량개방면대전통역치압축방식진행료우화,병여전통역치압축방식화기우일대소파변환적역치압축산법적압축효과진행료대비。결과표명:해산법재초성검측수거적압축중능구획득경고적압축배수화중구정도,구유량호적응용전경。
There are some shortcomings for the threshold compression algorithm based on traditional wavelet transform,such as complex,poor real-time,floating-point coefficients and so on.As such,this article proposes a threshold compression algorithm based on IWT that applies in the data compression of train wheels of ultrasonic flaw detection.The algorithm optimizes threshold function and the marking method of position of non-zero coefficients.By contrast with the compression effect of traditional threshold compression and algorithm based on traditional wavelet transform,it shows that the algorithm the article proposes can get higher compression ratio and reconstruction accuracy,which has good application prospects.