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Computer Science > Computer Vision and Pattern Recognition

arXiv:2308.05820 (cs)
[Submitted on 10 Aug 2023]

Title:Recognizing Handwritten Mathematical Expressions of Vertical Addition and Subtraction

Authors:Daniel Rosa, Filipe R. Cordeiro, Ruan Carvalho, Everton Souza, Sergio Chevtchenko, Luiz Rodrigues, Marcelo Marinho, Thales Vieira, Valmir Macario
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Abstract:Handwritten Mathematical Expression Recognition (HMER) is a challenging task with many educational applications. Recent methods for HMER have been developed for complex mathematical expressions in standard horizontal format. However, solutions for elementary mathematical expression, such as vertical addition and subtraction, have not been explored in the literature. This work proposes a new handwritten elementary mathematical expression dataset composed of addition and subtraction expressions in a vertical format. We also extended the MNIST dataset to generate artificial images with this structure. Furthermore, we proposed a solution for offline HMER, able to recognize vertical addition and subtraction expressions. Our analysis evaluated the object detection algorithms YOLO v7, YOLO v8, YOLO-NAS, NanoDet and FCOS for identifying the mathematical symbols. We also proposed a transcription method to map the bounding boxes from the object detection stage to a mathematical expression in the LATEX markup sequence. Results show that our approach is efficient, achieving a high expression recognition rate. The code and dataset are available at this https URL
Comments: Paper accepted at SIBGRAPI 2023
Subjects: Computer Vision and Pattern Recognition (cs.CV)
Cite as: arXiv:2308.05820 [cs.CV]
  (or arXiv:2308.05820v1 [cs.CV] for this version)
  https://doi.org/10.48550/arXiv.2308.05820

Submission history

From: Filipe Cordeiro [view email]
[v1] Thu, 10 Aug 2023 18:39:35 UTC (18,289 KB)
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