Last modified: 2022-12-29
Abstract
SAR images produced by active sensors have advantages in recording the earth's surface in cloud-covered areas, such as in parts of Indonesia. The resulting radar image has a drawback, namely speckle noise. This is caused by interactions outside the reflection phase of particular objects. In this study, EMD filtering is introduced to overcome this speckle-noise, which is assumed to decompose the temporal backscatter information from each pixel into logarithmic scales in different frequency domains. The multitemporal speckle filtering EMD method gives quite good results. Compared to the Quegan method, EMD can maintain its spatial resolution so that small objects will be preserved as information, not as noisy as in the Quegan method when filtered using a large window.