Classification of wastes by utilizing image processing and convolutional neural networks

Authors

DOI:

https://doi.org/10.35208/ert.1602490

Keywords:

Image processing , deep neural networks , ResNet50 , artificial intelligence , waste classification

Abstract

Effective waste management is essential for safeguarding human health and ensuring a clean environment. A critical component of waste management is the systematic separation of waste based on its categories. In this study, the classification of wastes is carried out by utilizing convolutional neural networks. Firstly, a novel dataset of 3035 waste images that contains 7 different categories (battery, glass, metal, organic, non-recyclable, paper-cardboard, plastic) is constructed by combining TrashNet image dataset (2527 images) and our own dataset (508 images). Then, the dataset was randomly divided to train (80% of data) and test (20% of data) sets to perform the hold-out validation. Finally pre-trained convolutional neural network ResNet50 is trained on the train set, and the model’s validity is checked by comparison with the test set. It is shown that ResNet50 is able to classify the wastes with high accuracy value (99.1%), even if the training is stopped at comparatively low epoch numbers. Our results indicate that the wastes can successfully be classified by deep learning from image data and the prevalent future direction regarding this topic is the detection and classification of wastes directly from videos in continuous processes.

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References

[1]. A. A. Aliyu and L. Amadu, “Urbanization, cities, and health: The challenges to Nigeria – A review,” Annals of African Medicine, vol. 16, no. 4, pp. 149–158, 2017.

[2]. A. Bano, “Direct environmental pollution from solid waste,” in Waste-to-Energy: Sustainable Approaches for Emerging Economies, 2024.

[3]. M. Kaya, S. Ulutürk, Y. Ç. Kaya, O. Altıntaş, and B. Turan, “Optimization of several deep CNN models for waste classification,” Sakarya University Journal of Computer and Information Sciences, vol. 6, no. 1, pp. 91–104, 2023.

[4]. “Global waste generation will nearly double by 2050,” The Economist, 2018. [Online]. Available: https://www.economist.com/graphic-detail/2018/10/02/global-waste-generation-will-nearly-double-by-2050

[5]. Y. Xiao, Q. Xiao, H. Tan, and Y. Luo, “Effects of mountain urbanization on greenhouse gas emissions from municipal solid waste management practices in Southwest China,” Environmental Monitoring and Assessment, vol. 192, no. 11, 2020.

[6]. R. Jakhar, L. Samek, and K. Styszko, “A comprehensive study of the impact of waste fires on the environment and health,” Sustainability, vol. 15, no. 19, 14241, 2023.

[7]. C. Wang, J. Qin, C. Qu, X. Ran, C. Liu, and B. Chen, “A smart municipal waste management system based on deep-learning and Internet of Things,” Waste Management, vol. 135, pp. 20–29, 2021.

[8]. A. Boyden, V. K. Soo, and M. Doolan, “The environmental impacts of recycling portable lithium-ion batteries,” Procedia CIRP, vol. 48, pp. 188–193, 2016.

[9]. H. I. Abdel-Shafy and M. S. M. Mansour, “Solid waste issue: Sources, composition, disposal, recycling, and valorization,” Egyptian Journal of Petroleum, vol. 27, no. 4, pp. 1275–1290, 2018.

[10]. R. Yamashita, M. Nishio, R. K. G. Do, and K. Togashi, “Convolutional neural networks: An overview and application in radiology,” Insights into Imaging, vol. 9, pp. 611–629, 2018.

[11]. C. Wang, J. Qin, C. Qu, X. Ran, C. Liu, and B. Chen, “A smart municipal waste management system based on deep-learning and Internet of Things,” Waste Management, vol. 135, pp. 20–29, 2021.

[12]. R. A. Aral, S. R. Keskin, M. Kaya, and M. Hacıömeroğlu, “Classification of TrashNet dataset based on deep learning models,” in Proceedings of the IEEE International Conference on Big Data, 2018, pp. 2058–2062.

[13]. Q. Zhang, Q. Yang, X. Zhang, Q. Bao, J. Su, and X. Liu, “Waste image classification based on transfer learning and convolutional neural network,” Waste Management, vol. 135, pp. 150–157, 2021.

[14]. D. Gyawali, A. Regmi, A. Shakya, A. Gautam, and S. Shrestha, “Comparative analysis of multiple deep CNN models for waste classification,” arXiv, 2020.

[15]. S. L. Rabano, M. K. Cabatuan, E. Sybingco, E. P. Dadios, and E. J. Calilung, “Common garbage classification using MobileNet,” in Proceedings of IEEE HNICEM, 2018.

[16]. Z. Feng, J. Yang, L. Chen, Z. Chen, and L. Li, “An intelligent waste-sorting and recycling device based on improved EfficientNet,” International Journal of Environmental Research and Public Health, vol. 19, no. 23, 15987, 2022.

[17]. K. Lin et al., “Applying a deep residual network coupling with transfer learning for recyclable waste sorting,” Environmental Science and Pollution Research, vol. 29, pp. 91081–91095, 2022.

[18]. G. Thung, “TrashNet dataset,” GitHub, 2023. [Online]. Available: https://github.com/garythung/trashnet

[19]. C. A. Aumann, “A methodology for developing simulation models of complex systems,” Ecological Modelling, vol. 202, pp. 385–396, 2007.

[20]. E. J. Rykiel, “Testing ecological models: The meaning of validation,” Ecological Modelling, vol. 90, pp. 229–244, 1996.

[21]. R. G. Sargent, “Simulation model validation,” in NATO ASI Series F: Computer and Systems Sciences, vol. 10, pp. 537–555, 1984.

[22]. C. Das, A. K. Sahoo, and C. Pradhan, “Multicriteria recommender system using different approaches,” in Cognitive Big Data Intelligence with a Metaheuristic Approach, pp. 259–277, 2022.

[23]. K. Yeturu, “Machine learning algorithms, applications, and practices in data science,” Handbook of Statistics, vol. 43, pp. 81–206, 2020.

[24]. F. Rodrigues et al., “Land-cover classification using deep learning with high-resolution remote-sensing imagery,” Applied Sciences, vol. 14, 1844, 2024.

[25]. N. A. Al-Humaidan and M. Prince, “A classification of Arab ethnicity based on face image using deep learning approach,” IEEE Access, vol. 9, pp. 50755–50766, 2021.

[26]. C. Zhang et al., “ResNet or DenseNet? Introducing dense shortcuts to ResNet,” in Proceedings of IEEE Winter Conference on Applications of Computer Vision, 2021, pp. 3549–3558.

[27]. H. K. Lee and S. B. Kim, “An overlap-sensitive margin classifier for imbalanced and overlapping data,” Expert Systems with Applications, vol. 98, pp. 72–83, 2018.

[28]. Y. Fan et al., “An experimental study of the joint effects of class imbalance and class overlap,” Communications in Computer and Information Science, vol. 2113, pp. 126–140, 2024.

[29]. C. Shi et al., “A waste classification method based on a multilayer hybrid convolution neural network,” Applied Sciences, vol. 11, 8572, 2021

[30]. J. R. Riba, R. Cantero, P. Riba-Mosoll, and R. Puig, “Post-consumer textile waste classification through near-infrared spectroscopy using an advanced deep learning approach,” Polymers, vol. 14, 2475, 2022.

[31]. L. Li, R. Wang, M. Zou, F. Guo, and Y. Ren, “Enhanced ResNet-50 for garbage classification: Feature fusion and depth-separable convolutions,” PLOS ONE, vol. 20, no. 1, e0317999, 2025.

[32]. Z. Feng, J. Yang, L. Chen, Z. Chen, and L. Li, “An intelligent waste-sorting and recycling device based on improved EfficientNet,” International Journal of Environmental Research and Public Health, vol. 19, no. 23, 15987, 2022.

[33]. Q. Zhang, Q. Yang, X. Zhang, Q. Bao, J. Su, and X. Liu, “Waste image classification based on transfer learning and convolutional neural networks under real-world noise perturbation,” Waste Management, vol. 135, pp. 150–157, 2021.

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Published

2026-03-02

How to Cite

Insel, M. A., Bas, N., Yücel, Özgün, & Sadıkoğlu, H. (2026). Classification of wastes by utilizing image processing and convolutional neural networks. Environmental Research and Technology, 9(Special Issue), 36–43. https://doi.org/10.35208/ert.1602490

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Section

Research Articles