Advances in SAR Change Detection
نویسنده
چکیده
SAR change detection performance using coherent change detection (CCD) and non-coherent change detection (NCCD) algorithms is demonstrated using high-resolution synthetic aperture radar (SAR) imagery gathered by the General Dynamics Data Collection System. CCD performance comparisons using phaseonly imagery versus complex (amplitude and phase) imagery are also presented. A new image quality metric, the “Universal Image Quality Index” is described and used to detect changes between a SAR intensity (reference versus test) image-pair; the change image is shown to be very similar to the corresponding CCD image. Studies of SAR coherent change detection using the Maximum Likelihood Estimate (MLE) of coherence are also presented; detection performance ROCs (PD vs. PFA curves) are presented comparing coherent and non-coherent change detection algorithms (CCD, MLE, and NCCD).
منابع مشابه
Change Detection in Urban Area Using Decision Level Fusion of Change Maps Extracted from Optic and SAR Images
The last few decades witnessed high urban growth rates in many countries. Urban growth can be mapped and measured by using remote sensing data and techniques along with several statistical measures. The purpose of this research is to detect the urban change that is used for urban planning. Change detection using remote sensing images can be classified into three methods: algebra-based, transfor...
متن کاملChange Mechanism Analysis and Integration Change Detection Method on Sar Images
Synthetic aperture radar (SAR) image change detection is a very complex problem like SAR imaging mechanism. Every change detection method has its advantage and disadvantage, and there are no optimal change detection approaches. If general means is directly applied to SAR image change detection, the results are usual no ideal. Sometimes, for a pair of multitemporal SAR images, different detectio...
متن کاملSurvey on Change Detection in SAR Images
Change detection in remote sensing images becomes more and more important for the last few decades, among them change detection in Synthetic Aperture Radar (SAR) images are having some more difficulties than optical ones due to the fact that SAR images suffer from the presence of the speckle noise. In this paper the Systematic survey of the common processing steps and core decision rules for ch...
متن کاملA change detection measure based on a likelihood ratio and statistical properties of SAR intensity images
With its weatherand illumination-independent characteristics, synthetic aperture radar (SAR) has become an important tool for change detection. There are two critical steps in SAR image change detection: designing a change detector and choosing a decision rule. Given a measure from a change detector, the change detection results could be sensitive to the decision rule, such as the selection of ...
متن کاملReducing Light Change Effects in Automatic Road Detection
Automatic road extraction from aerial images can be very helpful in traffic control and vehicle guidance systems. Most of the road detection approaches are based on image segmentation algorithms. Color-based segmentation is very sensitive to light changes and consequently the change of weather condition affects the recognition rate of road detection systems. In order to reduce the light change ...
متن کامل