This is artificial online handwritten mathematical expressions generated from CROHME database. The pupose of this project is that generate a large online handwritten mathematical expressions database from the existed database (CROHME). Please refer to our paper:
- Anh Duc Le and Masaki Nakagawa: Training an End-to-End System for Handwritten Mathematical Expression Recognition by Generated Patterns. Proc. of ICDAR 2017, pp. 1056-1061, Kyoto, Japan (11.2017).
- Anh Duc Le, Bipin Indurkhya, and Masaki Nakagawa: Pattern generation strategies for improving recognition of Handwritten Mathematical Expressions. (under review) https://arxiv.org/abs/1901.06763
We generated 3 new datasets: CROHME_DISTORTION, CROHME_DECOMPOSITION, CROHME_HYBRID
The number of equation in each dataset is shown in below:
| dataset | CROHME | CROHME_DISTORTION | CROHME_DECOMPOSITION | CROHME_HYBRID |
|---|---|---|---|---|
| # of MEs | 8,835 | 53,010 | 32,884 | 197,304 |
| Accuracy on Testing 2014(%) | 39.76 | 41.48 | 47.67 | 48.78 |
| Accuracy on Testing 2016(%) | 36.27 | 37.14 | 42.63 | 45.60 |
The dataset contains image folder and annotation files. The format of annotation files is as follows:
[image_file] [target latex]
target latex is normalized and inserted space between latex codes.
Example:
rit_42165_2.png \sin [ a + b ] = \sin a \cos b + \cos a \sin b
rit_42170_0.png x ^ { 4 } - 4 x ^ { 3 } - 1 4 x ^ { 2 } - 4 x + 1
rit_42170_1.png x ^ { 4 } - 4 x ^ { 2 } + 2 + \sqrt { 2 }
rit_42170_2.png \sin [ x + y ] = [ \sin x \cos y + \cos x \sin y ]
This dataset is licensed under a Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) License
http://bit.ly/2E7H8tX
Please send me an email if you have any question.
leducanh841988@gmail.com