Derzhak, V.V.Mazurets, O.V.Мазурець, Олександр Вікторович2025-12-102025-12-102025Derzhak V.V., Mazurets O.V. Approach to image preprocessing for household waste classification in circular economy. Resource-Saving Technologies of Apparel, Textile & Food Industry. Proceedings of International Scientific and Practical Conference. November 20, 2025. Khmelnytskyi, Ukraine. Pp. 319-323.https://elar.khmnu.edu.ua/handle/123456789/19937This work proposes an intelligent image preparation pipeline for stable multi-class classification of household waste in field conditions, emphasizing data quality control rather than architectural complexity. A coordinated scheme of non-reference quality assessment, guided selection of training frames, and carefully designed partitioning protocols significantly improves model stability under realistic variations in lighting, background contamination, small object occlusions and inter-site distribution shifts. Using MobileNetV3-Small with standardized hyperparameters, the study demonstrates higher reliability, reduced metric variability, and consistent behavior across critical subsets without sacrificing class representativeness. The methodology is reproducible, hardware-efficient, and suitable for industrial sorting systems, supporting circular economy practices by increasing fraction purity and reducing material loss. Future work will extend cross-site benchmarking and explore threshold dynamics for different waste categories.enСтаття