Yu Qifeng, Fu Sihua, Liu Xiaolin, Yang Xia, Sun Xiangyi
Opt Express. 2004 Oct 4;12(20):4980-5. doi: 10.1364/opex.12.004980.
Speckle fringe patterns of electronic speckle pattern interferometry (ESPI) are full of high-level speckle noise and are mainly processed by phase-shifting methods that normally require three speckle fringe patterns or more. The author proposes a novel method, the contoured correlation-fringe-pattern (CCFP) method, by which speckle-noise-free fringe patterns can be generated for ESPI. The application of this novel method is extended to the phase-shifting or phase-stepping for ESPI after its improvement. It generates speckle-noise-free phase fringes and remains valid for single phase-step condition, thus eliminates the two main disadvantages of the phase-shifting (stepping) methods of ESPI.
电子散斑干涉术（ESPI）的散斑条纹图案充满了高水平的散斑噪声，并且主要通过相移方法进行处理，而相移方法通常需要三个或更多的散斑条纹图案。作者提出了一种新颖的方法，即轮廓相关条纹图案（CCFP）方法，通过该方法可以为ESPI生成无散斑噪声的条纹图案。这种新颖方法在改进后被扩展应用于ESPI的相移或相步进。它生成无散斑噪声的相位条纹，并且在单相步进条件下仍然有效，从而消除了ESPI相移（步进）方法的两个主要缺点。
