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001-es BibID:	BIBFORM120927
035-os BibID:	(Scopus)85129234200 (WoS)000794755500001
Első szerző:	Gedeon Csongor István
Cím:	Identification and Counting of European Souslik Burrows from UAV Images by Pixel-Based Image Analysis and Random Forest Classification: A Simple, Semi-Automated, yet Accurate Method for Estimating Population Size / Csongor I. Gedeon, Mátyás Árvai, Gábor Szatmári, Eric C. Brevik, Tünde Takáts, Zsófia A. Kovács, János Mészáros
Dátum:	2022
ISSN:	2072-4292
Megjegyzések:	Burrowing mammals such as European sousliks are widespread and contribute significantly to soil ecosystem services. However, they have declined across their range and the non-invasive estimation of their actual population size has remained a challenge. Results support that the number of burrow entrances is positively correlated with population abundance, and burrow locations indicate the occupied area. We present an imagery-based method to identify and count animals' burrows semi-automatically by combining remotely recorded red, green, and blue (RGB) images, pixel-based imagery, and random forest (RF) classification. Field images were collected for four colonies, then combined and processed by histogram matching and spectral band normalization to improve the spectral distinctions among the categories BURROW, SOIL, TREE, and GRASS. The accuracy indexes of classification for BURROW kappa (?) were 95% (precision) and 90% (sensitivity). A 10-iteration bootstrapping of the final model resulted in coefficients of variation (CV%) of BURROW ? for sensitivity and precision lower than 5%; moreover, CV% values were not significantly different between those scores. The consistency of classification and balanced precision and sensitivity confirmed the applicability of this approach. Our approach provides an accurate, user-friendly, and relatively simple approach to count the number of burrow openings, estimate population abundance, and delineate the areas of occupancy non-invasively.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk population size random forest pixel-based imagery image processing model stability
Megjelenés:	Remote Sensing. - 14 : 9 (2022), p. 1-15. -
További szerzők:	Árvai Mátyás Szatmári Gábor (1988-) (geográfus) Brevik, Eric C. Takáts Tünde Kovács Zsófia Adrienn Mészáros János
Pályázati támogatás:	(K-131820) Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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