Visual clustering of ocean sediment grains using a combination of unsupervised machine learning methods.

7 Jul 2022, 17:05
15m
Presentation Track 3. Machine Learning in Natural Sciences Session 3. Machine learning in Biology and Other Natural Sciences

Speaker

Viktor Golikov

Description

Quantitative, granulometric and classification-based distribution of oceanic sediment grains are important indicators in paleo-reconstruction of the characteristics of marine waters. Currently, the classification of grains is performed visually by an expert on a limited subset of a sediment sample using a binocular microscope. It is a highly time-consuming process in which geological expertise is required of the observer. In this study, we propose a method to automate and accelerate this kind of work using a combination of machine learning algorithms. We photograph sediment samples prepared for examination using a digital optical microscope. We then apply a clustering algorithm including classical and neural machine learning techniques. An experienced marine geologist then identifies the resulting clusters. Our method significantly reduces the time consumption of the expert. We demonstrate that the proposed method is able to divide sediment grains into homogeneous groups suitable for further accurate classification. This will allow further evaluation of important characteristics (paleoindicators), such as the ratio of biogenic carbonate grains and therigenic grains, as well as the ratio of whole shells and shell fragments. The clustering results obtained using our algorithm may be used to train a more accurate classification algorithm.

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Primary authors

Viktor Golikov Mikhail Krinitskiy (Shirshov Institute of Oceanology, Russian Academy of Sciences) Dmitrii Borisov (Shirshov Institute of Oceanology, Russian Academy of Sciences)

Presentation Materials