Assessing the contribution of RGB VIs in improving building extraction from RGB-UAV images

Yıl 2024, Cilt: 6 Sayı: 1, 9 - 21, 15.06.2024

Richmond Akwasi Nsiah Saviour Mantey Yao Yevenyo Ziggah

https://doi.org/10.53093/mephoj.1399083

Öz

Buildings are a fundamental component of the built environment, and accurate information regarding their size, location, and distribution is vital for various purposes. The ever-increasing capabilities of unmanned aerial vehicles (UAVs) have sparked an interest in exploring various techniques to delineate buildings from the very high-resolution images obtained from UAV photogrammetry. However, the limited spectral information in UAV images, particularly the number of bands, can hinder the differentiation between various materials and objects. This setback can affect the ability to distinguish between different materials and objects. To address this limitation, vegetative ındices (VIs) have been employed to enhance the spectral strength of UAV orthophotos, thereby improving building classification. The objective of this study is to evaluate the contribution of four specific VIs: the green leaf index (GLI), red-green-blue vegetation index (RGBVI), visual atmospherically resistant index (VARI), and triangular greenness index (TGI). The significance of this contribution lies in assessing the potential of each VI to enhance building classification. The approach utilized the geographic object-based image analysis (GeoBIA) approach and a random forest classifier. To achieve this aim, five datasets were created, with each dataset comprising the RGB-UAV image and a corresponding RGB VI. The experimental results on the test dataset and a post-classification assessment indicated a general improvement in the classification when the VIs were added to the RGB orthophoto.

Anahtar Kelimeler

Building extraction, UAV, GeoBIA, RGB vegetative indices, Random forest

Etik Beyan

The authors declare that the submitted manuscript is original. The authors also acknowledge that the current research has been conducted ethically, and all authors have agreed to the final shape of the research. The authors declare that this manuscript does not involve researching humans or animals.

Kaynakça

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