Ocean oil spills can be considered as one of the
worst environmental impacts on the coastal ecosystem, fishery
and health of people. Nevertheless, although there are many
possibilities to observe wide ocean zones using remote sensing
technology, a huge amount of data collected every day by
satellite cannot be processed manually. Nowadays, deep learning
techniques prove their good performance, but they require
expensive GPU hardware and time-consuming training processes.
Besides, deep learning uses the black box approach. In order
to deal with these disadvantages, the lightweight classification
pipeline based on handcrafted features and CPU training was
developed. Satellite images were used as an input to the classifier
and contained 87 handcrafted features which were divided into
four categories: textures calculated with the help of GLCM ap
proach, statistics, spectra and frequency domain features. Using
Optuna framework, optimal hyperparameters were found for
five machine learning algorithms: SVM, RF, XGBoost, CatBoost
and HistGradientBoosting (HistGBM). Probabilities estimated by
these models were aggregated in the MLP meta-classifier for final
classification task. Furthermore, SHAP values for each model
were calculated in order to assess the influence of every feature
on the prediction result. Accuracy and AUC scores of the pipeline
reached 98.67% and 99.81% correspondingly on the dataset of
10,650 satellite images.
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