CFAR edge detector for polarimetric SAR images
- 28 February 2003
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Geoscience and Remote Sensing
- Vol. 41 (1), 20-32
- https://doi.org/10.1109/tgrs.2002.808063
Abstract
Finding the edges between different regions in an image is one of the fundamental steps of image analysis, and several edge detectors suitable for the special statistics of synthetic aperture radar (SAR) intensity images have previously been developed. In this paper, a new edge detector for polarimetric SAR images is presented using a newly developed test statistic in the complex Wishart distribution to test for equality of covariance matrices. The new edge detector can be applied to a wide range of SAR data from single-channel intensity data to multifrequency and/or multitemporal polarimetric SAR data. By simply changing the parameters characterizing the test statistic according to the applied SAR data, constant false-alarm rate detection is always obtained. An adaptive filtering scheme is presented, and the distributions of the detector are verified using simulated polarimetric SAR images. Using SAR data from the Danish airborne polarimetric SAR, EMISAR, it is demonstrated that superior edge detection results are obtained using polarimetric and/or multifrequency data compared to using only intensity data.Keywords
This publication has 17 references indexed in Scilit:
- A test statistic in the complex wishart distribution and its application to change detection in polarimetric SAR dataIEEE Transactions on Geoscience and Remote Sensing, 2003
- Tensor based structure estimation in multi-channel imagesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2000
- Polarimetric SAR speckle filtering and its implication for classificationIEEE Transactions on Geoscience and Remote Sensing, 1999
- An optimal multiedge detector for SAR image segmentationIEEE Transactions on Geoscience and Remote Sensing, 1998
- Detection of linear features in SAR images: application to road network extractionIEEE Transactions on Geoscience and Remote Sensing, 1998
- EMISAR: an absolutely calibrated polarimetric L- and C-band SARIEEE Transactions on Geoscience and Remote Sensing, 1998
- Simultaneous mean and texture edge detection in SAR clutterIEE Proceedings - Radar, Sonar and Navigation, 1996
- Structure detection and statistical adaptive speckle filtering in SAR imagesInternational Journal of Remote Sensing, 1993
- Theoretical Models For Polarimetric Radar ClutterJournal of Electromagnetic Waves and Applications, 1987
- Statistical Analysis Based on a Certain Multivariate Complex Gaussian Distribution (An Introduction)The Annals of Mathematical Statistics, 1963