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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Elektronika dan Telekomunikasi
Izzul Qudsi
Geovartha
Earth & Planetary Sciences Electrical & Electronics Engineering Engineering

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Journal : Jurnal Elektronika dan Telekomunikasi

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Mineral Mapping on Hyperspectral Imageries Using Cohesion-based Self Merging Algorithm Afnindar Fakhrurrozi; Izzul Qudsi; Mochamad Rifat Noor; Anggun Mayang Sari
Jurnal Elektronika dan Telekomunikasi Vol 22, No 2 (2022)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.507

Abstract

Recently, hybrid clustering algorithms gained much research attention due to better clustering results and are computationally efficient. Hyperspectral image classification studies should be no exception, including mineral mapping. This study aims to tackle the biggest challenge of mapping the mineralogy of drill core samples, which consumes a lot of time. In this paper, we present the investigation using a hybrid clustering algorithm, cohesion-based self-merging (CSM), for mineral mapping to determine the number and location of minerals that formed the rock. The CSM clustering performance was then compared to its classical counterpart, K-means plus-plus (K-means++). We conducted experiments using hyperspectral images from multiple rock samples to understand how well the clustering algorithm segmented minerals that exist in the rock. The samples in this study contain minerals with identical absorption features in certain locations that increase the complexity. The elbow method and silhouette analysis did not perform well in deciding the optimum cluster size due to slight variance and high dimensionality of the datasets. Thus, iterations to the various numbers of k-clusters and m-subclusters of each rock were performed to get the mineral cluster. Both algorithms were able to distinguish slight variations of absorption features of any mineral. The spectral variation within a single mineral found by our algorithm might be studied further to understand any possible unidentified group of clusters. The spatial consideration of the CSM algorithm induced several misclassified pixels. Hence, the mineral maps produced in this study are not expected to be precisely similar to ground truths.
Co-Authors Afnindar Fakhrurrozi Anggun Mayang Sari Mochamad Rifat Noor Muhammad Rifat Noor