LULC - Special topic

Land Use and Land Cover I

6107.3 - An object-based approach for tree species extraction from digital orthophoto maps

Thursday, July 6
9:10 AM - 9:30 AM
Location: Maryland B

Tree segmentation is an active and ongoing research area in the field of photogrammetry and remote sensing. It is more challenging due to both intra-class and inter-class similarities among various tree species. In this study, we exploited various statistical features for extraction of hazelnut trees from 1:5000 scaled digital orthophoto maps. Initially, the non-vegetation areas were eliminated using traditional normalized difference vegetation index (NDVI) followed by application of mean shift segmentation for transforming the pixels into meaningful homogeneous objects. In order to eliminate false positives, morphological opening and closing was employed on candidate objects. A number of heuristics were also derived to eliminate unwanted effects such as shadow and bounding box aspect ratios, before passing them into the classification stage. Finally, a knowledge based decision tree was constructed to distinguish the hazelnut trees from rest of objects which include manmade objects and other type of vegetation. We evaluated the proposed methodology on 10 sample orthophoto maps obtained from Giresun province in Turkey. The manually digitized hazelnut tree boundaries were taken as reference data for accuracy assessment. Both manually digitized and segmented tree borders were converted into binary images and the differences were calculated. According to the obtained results, the proposed methodology obtained an overall accuracy of more than 85% for all sample images.

Akhtar Jamil

PhD Candidate
Yildiz Technical University

PhD candidate at Yildiz Technical University, Dept. of Geomatics Engineering. He received his MS degree from National University of Sciences and Technology, Pakistan, in the field of Digital Image Processing. He did BS(CS) from University of Karachi and remained attached with a private organization for the development of various complex softwares. After postgraduation, he joined COMSATS Institute of Information Technology, Abbottabad as Lecturer/Research and remained attached to it for three years.

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Bulent Bayram

Prof.Dr.
Yildiz Technical University

Bülent Bayram is currently Professor in the Department of Geomatics, Yildiz Technical University, Istanbul-Turkey. He received his BS degree from Department of Geodesy and Photogrammetry Engineering, Black Sea Technical University, Trabzon-Turkey in 1987. He got his MS and PhD degrees from Geodesy and Photogrammetry Engineering Department of Yildiz Technical University, Istanbul-Turkey in 1990 and 1998 respectively. He worked as Research Assistant between 1991 and 2000 at Department of Geomatics, Yildiz Technical University. He worked at the same department as Assistant Professor between 2000 and 2009. He worked as Associate Professor between 2009-2014. Since then, he is currently working as Professor at the same department.

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Ammatzia Peled

Prof.
University of Haifa

Dr. Ammatzia Peled is a professor for GIS&RS at the University of Haifa, Israel. Ammatzia Served as the Chair of the ICA Commission on Incremental Updating and Versioning of spatial Databases. He served also as ISPRS Treasurer and Second Vice President and as ISPRS president of Commission VIII. In 2010, Prof. Peled was awarded the Eduard Tsiolkovsky Memorial GOLD Medal by the Russian Academy for Cosmonautics for “Outstanding contribution to Cosmonautics”. In 2013 he was awarded as a Professor Honoris Causa by the Siberia State Academy for Geodesy & Cartography and last July he was awarded as ISPRS Fellow.

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