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Table 2 Average retrieval precision values by analysing the first N = 5, 10, 20 retrieved images relative to relevant diagnostic skin lesion categories which are uniform in the visual appearance

From: Definition of an automated Content-Based Image Retrieval (CBIR) system for the comparison of dermoscopic images of pigmented skin lesions

Diagnosis

Average

Retrieval

Precision

A-priori probability

 

5

10

20

 

Melanoma with regression structures

70.0%

52.5%

38.7%

0.11%

Melanoma with atypical pigment network

76.6%

48.3%

35.0%

0.18%

Acral nevi

76.6%

72.5%

69.3%

9.51%

Benign nevi

95.2%

94.4%

94.1%

85.8%

Blue nevi

51.4%

40.0%

30.3%

0.49%

Basal cell carcinomas

40.0%

29.9%

22.2%

0.21%

  1. The percentage of the archive images belonging to each category are reported in order to show the effectiveness of the proposed retrieval system in finding relevant images.