Review of techniques and models used in optical chemical structure recognition in images and scanned documents

Table 1 Performance of the rule-based approaches

OCSR system	Year	Dataset	Evaluation	Results (%)
OSRA	2009	66 images, 215 structures	Tanimoto	95
chemoCR	2011	1000 structures	Structure match	65.6
Markov Logic OCSR	2014	937 images—subset of produced by the USPOCW	InChI match	79.1
			Tanimoto	92.9
		869 images from ChemInfty	InChI match	35.1
			Tanimoto	77.6
OCSR in [38]	2016	360 structures	Structure match	26.1
OCSR in [18]	2019	50 images	Structure match	86
OCSR in [19]	2021	2100 images	Structure match	89.5

ISSN: 1758-2946