CAJ | 학술논문

数字散斑照相术提取的数字散斑条纹图存在信噪比低、强度弱的特点,因此需要对图像进行滤波除噪.为了比较不同的滤波方法对散斑条纹图的除噪效果,笔者在MATLAB中采用中值滤波、巴特沃斯低通滤波、指数低通滤波以及同态滤波对提取的条纹图进行处理并就处理结果做出了分析比较.实验结果表明,以上方法都能从噪声中提取信号,其中中值滤波除噪效果最好.
수자산반조상술제취적수자산반조문도존재신조비저、강도약적특점,인차수요대도상진행려파제조.위료비교불동적려파방법대산반조문도적제조효과,필자재MATLAB중채용중치려파、파특옥사저통려파、지수저통려파이급동태려파대제취적조문도진행처리병취처리결과주출료분석비교.실험결과표명,이상방법도능종조성중제취신호,기중중치려파제조효과최호.
The speckle fringe pattern from the digital speckle photography have the features of low signal-to-noise ratio,and weak intensity,so they need for filtering noise.In order to compare the effect of different filtering methods,we use the median filter,butterworth low-pass filter,index of low pass filter and homomorphic filter to remove the noise and comparison of the results.The results show that al of these methods can extract weak signal from noise,and the median filter can eliminate the noise more effectively.