Prediction of Landslide by Displacement Measurement using Sampling Moiré Method

In sampling moire method, a specimen grating pattern on an object is recorded by a digital camera. A moire fringe pattern appears by sampling the recorded grating pattern with a constant pixel pitch. The phase analysis of the moire patterns obtained from one grating pattern provides accurate results of displacement values of the grating. Meanwhile, it is very important to keep our life safely by predicting landslides. If the small displacement of land before the landslide is detected, it is possible to put out an alert before the disaster happens. In this paper, a measurement system for small displacement of landslide by sampling moire method is developed.