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Table 4 Evaluation of the proposed symbol spotting approach on the GREC contest dataset [5], ideal case (best overall performance shown in italics)

From: Symbol spotting for architectural drawings: state-of-the-art and new industry-driven developments

Method P R F RecR AveP
Proposed TH = 0.950* 0.989 0.947 0.968 97.00% 0.00
  TH = 0.925 0.986 0.962 0.974 97.60% 2.40
  TH = 0.900 0.985 0.977 0.981 98.30% 2.60
  TH = 0.875 0.983 0.992 0.987 100.00% 3.60
  TH = 0.850 0.966 0.992 0.979 100.00% 4.30
Nayef and Breuel [57], as reported in [5] 0.620 0.990 0.760 99.31% 18.75
  1. *TH = correlation threshold