Abstract

In this study, the effect of threshold values used for road segments detection in synthetic aperture radar (SAR) images of road network generation is examined. A three-phase method is applied as follows: image smoothing, road segments detection and irrelevant segments removal. Threshold values used in road segment detection phase are evaluated for four different situations and results are compared. The software is developed to apply and test all situations. Two different synthetic aperture radar images are used in experimental studies.

Highlights

  • Since the developments in space technology increase rapidly, more advanced satellites are built

  • The effect of threshold values used for road segments detection in synthetic aperture radar (SAR) images on road network generation is examined

  • We developed the software to evaluate four different situations of thresholds values

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Summary

INTRODUCTION

Since the developments in space technology increase rapidly, more advanced satellites are built. Tupin et al [2] present a study which detects linear features like roads They use two different line detectors and Markov random field based connection method. A new method for a feature based supervised classification is presented by Borghys et al [7] They classify SAR images as road, water, forest etc. Cheng et al [14] present a main road extraction method based on Markov Random Field They accelerate their method by utilising GPU and apply their method to polarimetric SAR images. Jin et al [15] develop a constant false alarm line detector for polarimetric SAR images They use Wilks’ test statistic which can detect bright and dark features.

IMAGE SMOOTHING
ROAD SEGMENTS DETECTION
IRRELEVANT SEGMENTS REMOVAL
EXPERIMENTAL RESULTS
CONCLUSION
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