Ms. Judyta Ksiazek Profile

Judyta Ksiazek

at AGH Univ of Science and Technology

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Proceedings Article | 15 October 2015 Paper

A research of selected textural features for detection of asbestos-cement roofing sheets using orthoimages

Judyta Książek

Proceedings Volume 9643, 96432J (2015) https://doi.org/10.1117/12.2195208

KEYWORDS: Image classification, Error analysis, Autoregressive models, Machine learning, Principal component analysis, Image processing, Data modeling, Remote sensing, Environmental sensing, Statistical analysis

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At present, there has been a great interest in the development of texture based image classification methods in many different areas. This study presents the results of research carried out to assess the usefulness of selected textural features for detection of asbestos-cement roofs in orthophotomap classification.

Two different orthophotomaps of southern Poland (with ground resolution: 5 cm and 25 cm) were used. On both orthoimages representative samples for two classes: asbestos-cement roofing sheets and other roofing materials were selected. Estimation of texture analysis usefulness was conducted using machine learning methods based on decision trees (C5.0 algorithm). For this purpose, various sets of texture parameters were calculated in MaZda software. During the calculation of decision trees different numbers of texture parameters groups were considered. In order to obtain the best settings for decision trees models cross-validation was performed. Decision trees models with the lowest mean classification error were selected.

The accuracy of the classification was held based on validation data sets, which were not used for the classification learning. For 5 cm ground resolution samples, the lowest mean classification error was 15.6%. The lowest mean classification error in the case of 25 cm ground resolution was 20.0%. The obtained results confirm potential usefulness of the texture parameter image processing for detection of asbestos-cement roofing sheets. In order to improve the accuracy another extended study should be considered in which additional textural features as well as spectral characteristics should be analyzed.

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