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. 2021 Sep 13;7:e620. doi: 10.7717/peerj-cs.620

Table 6. Performance metrics used by various researchers for the dental image analysis.

Metrics Symbol Author’s
True positive rate (sensitivity, recall) TPR (Hosntalab et al., 2010; Mortaheb, Rezaeian & Soltanian-Zadeh, 2013; Pushparaj et al., 2013; Ghaedi et al., 2014; Abdi, Kasaei & Mehdizadeh, 2015; Berdouses et al., 2015; Datta & Chaki, 2015b; Alsmadi, 2018; Datta, Chaki & Modak, 2019, 2020)
True negative rate (specificity) TNR (Hosntalab et al., 2010; Mortaheb, Rezaeian & Soltanian-Zadeh, 2013; Ghaedi et al., 2014; Abdi, Kasaei & Mehdizadeh, 2015; Berdouses et al., 2015; Datta & Chaki, 2015b; Alsmadi, 2018; Datta, Chaki & Modak, 2019)
Positive predictive value (precision) PPV (Hosntalab et al., 2010; Mortaheb, Rezaeian & Soltanian-Zadeh, 2013; Pushparaj et al., 2013; Berdouses et al., 2015; Datta, Chaki & Modak, 2020)
Jaccard index JAC (Ji, Ong & Foong, 2014)
Dice coefficient DSC (Ji, Ong & Foong, 2014; Abdi, Kasaei & Mehdizadeh, 2015; Datta, Chaki & Modak, 2019; Devi, Banumathi & Ulaganathan, 2019)
F-Measure (F1 Measure = Dice) FMS (Berdouses et al., 2015; Datta, Chaki & Modak, 2020)
Accuracy ACC (Huang & Hsu, 2008; Olsen et al., 2009; Banu et al., 2014; Nuansanong, Kiattisin & Leelasantitham, 2014; Ghaedi et al., 2014; Lin et al., 2014; Datta & Chaki, 2015a,b; Poonsri et al., 2016; Rad et al., 2018; Osterloh & Viriri, 2019; Datta, Chaki & Modak, 2019, 2020; Devi, Banumathi & Ulaganathan, 2019; Kumar, Bhadauria & Singh, 2020)
Mahalanobis distance MHD (Pushparaj, Gurunathan & Arumugam, 2013)
Hausdorff distance HD (Abdi, Kasaei & Mehdizadeh, 2015)
Distance vector DV (Prajapati, Desai & Modi, 2012)
Similarity measure SM (Pushparaj, Gurunathan & Arumugam, 2013; Alsmadi, 2018; Singh & Agarwal, 2018)
The area under ROC curve AUC (Nuansanong, Kiattisin & Leelasantitham, 2014)
Cohens kappa coefficient KAP (Berdouses et al., 2015)
Mean absolute error MAE (Vijayakumari et al., 2012; Amer & Aqel, 2015; Tuan et al., 2018; Kumar, Bhadauria & Singh, 2020)
Mean square error MSE (Vijayakumari et al., 2012; Singh & Agarwal, 2018; Tuan et al., 2018)
Error rate ERR (Zhou & Abdel-Mottaleb, 2005; Nomir & Abdel-Mottaleb, 2008; Hosntalab et al., 2010; Harandi & Pourghassem, 2011; Lira et al., 2014; Datta & Chaki, 2015b; Purnama et al., 2015; Tuan et al., 2018; Banday & Mir, 2019)
Failure rate FR (Said et al., 2006; Al-sherif, Guo & Ammar, 2012)