Abstract
This paper presents a ground-truthed dataset of chemical structure images in Japanese published patent applications. The ground-truthed dataset of 5576 chemical images was made in the following manner. First, the graphical structure of chemical images was recognized by a chemical structure recognition software program developed by our group. Then, with a newly developed correction GUI, the graphical structure dataset was corrected manually. Second, the graphical structure dataset was converted into another dataset representing the chemical structure. The chemical structure dataset was also corrected manually by another newly developed correction GUI. The result of statistical analysis of chemical structure images contained in the Japanese published patent applications is also presented in this paper. Although we concentrated on Japanese published patent applications, this dataset includes a wide range of chemical structure images.
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