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VillageFinder : segmentation of nucleated villages in satellite imagery
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Murtaza, Kashif, Khan, Sohaib and Rajpoot, Nasir M. (Nasir Mahmood) (2009) VillageFinder : segmentation of nucleated villages in satellite imagery. In: British Machine Vision Conference (BMVC 2009), London, 7-10 Sept 2009 (Unpublished)
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Official URL: http://dx.doi.org/10.5244/C.23.83
Abstract
Geo-spatial data on village locations, their size, population and other parameters is scarcely available to decision makers in many developing countries. In this paper, we demonstrate an automatic ?crawler? which can segment nucleated villages from satellite imagery freely available in public domain geographic information systems such as Google EarthTM. Our approach is to use frequency and color features to generate a number of weak classifiers, which are then combined through Adaboost to produce the final classifier. We use a total of 69 features in the generation of the weak classifiers, including phase gradients, cornerness measures and color features. Our primary dataset consists of 60 images having more than 345 million pixels and covering more than 100 km2 of area, containing nucleated villages in fifteen countries, spread over four continents and captured by different sensors. Using six manual annotations for ground-truth, we perform five-fold cross validation, using 25% of data for testing. Our results show an Equal Error Rate (EER) of around 3.4%. Using the trained classifier, we detect villages on a 50 km2 image (close to 184 million pixels) from a different site than the images used in training, and demonstrate highly accurate extraction of villages with 2.3% false positives and 0.01% false negatives.
Item Type: | Conference Item (Poster) | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science | ||||
Library of Congress Subject Headings (LCSH): | Image processing, Geospatial data -- Computer programs, Villages -- Computer programs | ||||
Official Date: | September 2009 | ||||
Dates: |
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Status: | Peer Reviewed | ||||
Publication Status: | Unpublished | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 28 July 2016 | ||||
Date of first compliant Open Access: | 28 July 2016 | ||||
Conference Paper Type: | Poster | ||||
Title of Event: | British Machine Vision Conference (BMVC 2009) | ||||
Type of Event: | Conference | ||||
Location of Event: | London | ||||
Date(s) of Event: | 7-10 Sept 2009 | ||||
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