CAJ | 학술논문

为了解决在数字散斑干涉技术测量时，散斑干涉相位条纹图像中大量噪声对相位解包裹结果和精度产生严重影响的问题，介绍了一种条纹正余弦分解和频域低通滤波结合的方法，实现了散斑干涉相位条纹图的高精度滤波。该方法的基本思路是在对相位图像进行滤波处理前，先将相位图通过正余弦函数进行映射转换成两幅图，分别经过频域滤波，然后再合成为相位图。这种分解频域滤波方法可以在滤波的同时，有效保留相位跳变信息。实验结果表明：与传统的图像降噪方法相比，该方法能够在保留图像“尖峰”信息的基础上，较好地滤除图像中的散斑噪声，方法简单有效，有效解决了传统滤波方法应用在相位条纹图中，相图灰度信息丢失10％～40％的问题。
위료해결재수자산반간섭기술측량시，산반간섭상위조문도상중대량조성대상위해포과결과화정도산생엄중영향적문제，개소료일충조문정여현분해화빈역저통려파결합적방법，실현료산반간섭상위조문도적고정도려파。해방법적기본사로시재대상위도상진행려파처리전，선장상위도통과정여현함수진행영사전환성량폭도，분별경과빈역려파，연후재합성위상위도。저충분해빈역려파방법가이재려파적동시，유효보류상위도변신식。실험결과표명：여전통적도상강조방법상비，해방법능구재보류도상“첨봉”신식적기출상，교호지려제도상중적산반조성，방법간단유효，유효해결료전통려파방법응용재상위조문도중，상도회도신식주실10％～40％적문제。
In order to solve the problem of serious influence of much noise in the phase fringe patterns of digit -al speckle pattern interferometry on the result and accuracy of phase unwrapping , an effective method of stripe sine/cosine decomposition combined with frequency domain low-pass filtering is introduced in this paper , and the high precision filter of phase fringe patterns of digital speckle pattern interferometry is realized .Basic idea of this method is that phase fringe patterns is mapped into two patterns by the sine /cosine function before the phase image filter processing , and then is synthesized into phase fringe patterns through frequency domain fil-ter.This decomposition frequency domain filtering method can retention phase jump information effectively when filtering .Experimental results show that compared with the traditional image noise reduction method ,this method can filter out the speckle noise in images better on the basis of reserving “rush” image informa-tion, and it is simple and effective , which solves the problem of loss from 10%to 40%for phase fringe pat-terns gray level information when traditional filtering methods are used in stripe phase fringe patterns .