Feature extraction from geoeye-1 stereo pairs data for forested area
- 1Aristotle University of Thessaloniki, School of Rural and Surveying Engineering, Thessaloniki, Greece
- 2Aristotle University of Thessaloniki (AUTH), School of Civil Engineering, Thessaloniki, Greece
- 3Aristotle University of Thessaloniki, School of Spatial Planning and Development, Thessaloniki, Greece
Keywords: Geoeye-1, Stereo pairs, High Pass Filter fusion technique, DSM generation, Forested area ABSTRACT:
Abstract. Remote sensing facilitates the extraction of information for earth’s surface through its capability of acquiring images covering large areas and the availability of commercial software for their processing. The aim of this study is the feature extraction from three Geoeye-1 stereo pairs for forested area. The study area is located in central mountainous forested peninsula of Chalkidiki, in northern Greece. Dominant forest tree species of the site are oak (Quercus conferta), beech (Fagus moesiaca), black pine (Pinus nigra) and calabrian pine (Pinus brutia). Very High Resolution (VHR) Geoeye-1 stereo pair satellite images were utilized in panchromatic and multispectral mode. The panchromatic mode was employed for Digital Surface Model (DSM) generation and its evaluation. In this study the High Pass Filter (HPF) data fusion technique was applied between panchromatic and multispectral mode for acquiring a new image with the benefits of both contracting images. Because of the fact that the feature extraction was attempted in a forested region, NDVI index and Tasseled Cap transformation were applied in the fused images’ evaluation procedure. Optical assessment was also applied. The accuracy of the generated DSM and the evaluation results of the fused images were remarkable.