VARIOUS METHODS TO DETECT BUILDINGS USING IMAGE AND LIDAR DATA

  • Nusret Demir
Keywords: LIDAR, Digital Surface Model, Building Detection, Quality Assessment, Point Cloud, Classification

Abstract

Four different variants of building detection are presented. Each variant has a different workflow and is capable of detecting buildings. The first variant of building detection is based on multispectral classification and DSM filtering. In the second variant, DSM blobs, mainly consisting of buildings and trees, are detected by subtraction of the DTM from the DSM. Then, trees are eliminated using NDVI data, derived from unsupervised ISODATA classification of the multispectral images, while small non-building objects are rejected based on size criteria. The third variant uses the planimetric density of raw LIDAR DTM data to detect the above-ground objects. The fourth variant is like the third one, but uses the vertical density of the raw LIDAR data (all points) to distinguish trees and buildings. To improve the results, a combination of the four variants using set intersections and unions is performed. The combination was empirical, with consideration of the datasets used in each variant and the advantages and disadvantages of each variant. In the evaluation, the combination of the four individual results yields 94% correct detections and an omission error of 12% for Zurich airport dataset.

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Published
2015-01-26
How to Cite
[1]
N. Demir, “VARIOUS METHODS TO DETECT BUILDINGS USING IMAGE AND LIDAR DATA”, JAST, vol. 8, no. 1, pp. 55-65, Jan. 2015.
Section
Articles