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Table 2 Evaluation of the tumour extraction algorithm without colour deconvolution in BCC histology slides

From: Performance of a simple chromatin-rich segmentation algorithm in quantifying basal cell carcinoma from histology images

Tumours Sensitivity (%) Specificity (%) PPV (%) NPV (%)
Infiltrative 81.25 68.72 53.57 87.87
Superficial 98.46 74.20 27.34 99.78
Nodular 95.11 80.92 76.90 93.92
All 91.61 74.61 52.60 93.86
  1. PPV: Positive Predictive Value = [True Positive Pixels/(True Positive Pixels + False Positive Pixels)] · 100%; NPV: Negative Predictive Value = [True Negative Pixels/(True Negative Pixels + False Negative Pixels)] · 100%; Sensitivity = [True Positive Pixels/(True Positive Pixels + False Negative Pixels)] · 100%; Specificity = [True Negative Pixels/(True negative Pixels + False Positive Pixels)] · 100%