Fine-grained geometric shapes: A deep classification task


  • Jorge Díaz-Ramírez Universidad de Tarapacá, Departamento de Ingeniería y Tecnologías, Facultad de Ingeniería, Iquique, Chile
  • Fabrizio Alvarez-Alvarez Universidad de Tarapacá, Departamento de Ingeniería y Tecnologías, Facultad de Ingeniería, Iquique, Chile
  • Ximena Badilla-Torrico Universidad de Tarapacá, Departamento de Ingeniería y Tecnologías, Facultad de Ingeniería, Iquique, Chile


Convolutional Neural Networks, Fine-grained, Image classification, Deep Learning, Transfer Learning


Although the importance of Deep Learning has been well established in recent years, its role in classifying objects in images is far from being understood in fine categories and this open problem remains to be solved in geometric shapes. Here we compare deep learning models using convolutional neural networks, in order to classify fine categories in geometrical figure type images. Through the proposed method we found that there are several configurations of base models that obtain accuracies close to 80%. The proposed method also allowed us to identify that using Transfer Learning increases the accuracy by about 7% compared to the base models. Overall, these data show that the number of examples plays an important role in obtaining good classification results, as well as their quality, since noisy data in a dataset can severely reduce the generalization performance of the model in question.


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Author Biographies

Jorge Díaz-Ramírez, Universidad de Tarapacá, Departamento de Ingeniería y Tecnologías, Facultad de Ingeniería, Iquique, Chile

Jorge Diaz-Ramirez graduated in computer engineering from Universidad de Tarapacá, Chile, in 2009 and obtained a Master’s degree in Information Technology from Universidad Técnica Federico Santa María, Chile, in 2015. He is currently pursuing the Ph.D. degree in computer Science at the Universidad Católica de Chile, PUC. He has been an professor of Computer Engineering at Universidad de Tarapacá since 2012. His research interests include Machine Learning, Deep Learning and Visual Navigation.

Fabrizio Alvarez-Alvarez, Universidad de Tarapacá, Departamento de Ingeniería y Tecnologías, Facultad de Ingeniería, Iquique, Chile

Fabrizio Alvarez-Alvarez is Computer Engineer graduated from Universidad de Tarapacá, Chile. He currently works as a computer engineer in a private certification company. His interests are Machine Learning, deep learning and data analysis.

Ximena Badilla-Torrico, Universidad de Tarapacá, Departamento de Ingeniería y Tecnologías, Facultad de Ingeniería, Iquique, Chile

Ximena Badilla-Torrico is a professor in the Engineering Faculty of Universidad de Tarapacá, she has a career in computer engineering and an MBA grade. Her interests include Information Systems, Software Engineering and Machine Learning.


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How to Cite

Díaz-Ramírez, J., Alvarez-Alvarez, F., & Badilla-Torrico, X. . (2022). Fine-grained geometric shapes: A deep classification task. IEEE Latin America Transactions, 20(7), 1051–1057. Retrieved from