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Table 1 The table shows the grouping of the taxonomy features and its idealistic feature values for the creation of the database for automatic classification purpose

From: Discriminative histogram taxonomy features for snake species identification

Feature group Features Feature name Spectacled cobra King cobra Common krait Russel’s viper Saw scaled viper Hump nosed pit viper
Top F 1 Rostral 1 1 1 1 1 1
F 2 Internasal 2 2 2 1 1 2
F 3 Prefrontal 2 2 2 1 1 2
F 4 Supraocular 2 2 2 1 1 2
F 5 Frontal 2 2 2 1 1 2
F 6 Parietals 2 2 2 1 1 2
F 7 V mark on head 0 0 0 1 0 0
F 8 Triangular head 0 0 0 1 0 1
F 9 Two dark patch on head 0 0 0 1 0 0
F 10 Number of scales between Supraoculars 1 1 1 6-9 6-9 1
F 11 Big occipital 0 1 0 0 0 0
F 12 Plus sign in the head 0 0 0 0 1 0
Side F 13 Small nostril 1 1 1 0 1 1
F 14 Round pupil 1 1 1 0 0 0
F 15 Big nostril 0 0 0 1 0 0
F 16 Elliptical pupil 0 0 0 1 1 1
F 17 Loreal 0 0 0 1 1 1
F 18 Nasorostral 0 0 0 1 0 0
F 19 Supranasal 0 0 0 1 0 0
F 20 Triangular brown streaks below/behind eyes 0 0 0 1 0 0
F 21 Subocular 0 0 0 1 1 1
F 22 Nasal 2 2 2 1 3 1
F 23 Preoculars 1 1 1 4 4 4
F 24 Postoculars 3 3 2 4 4 4
F 25 Supralabial scale 6-7 6-7 6-7 9-11 9-11 9-11
F 38 Pit between eyes and nose 0 0 0 0 0 1
Bottom F 26 Mental 1 1 1 1 1 1
F 27 Asterior sublingual 1 1 1 1 1 1
F 28 Posterior sublingual 1 1 1 1 1 1
Body F 29 Round/smooth scale 1 1 1 0 0 0
F 30 Hood 1 0 0 0 0 0
F 31 Spectacled mark on hood 1 0 0 0 0 0
F 32 Keeled scale 0 0 0 1 1 1
F 33 Spots on dorsal scale 0 0 0 1 1 1
F 34 White/yellow stripes on dorsal scale 0 1 1 0 0 0
F 35 Black stripes on ventral scale 0 1 0 0 0 0
F 36 Enlarged and Hexagonal vertebral scale 0 0 1 0 0 0
F 37 Ventral scale 1 1 1 1 1 1
  1. If certain features are visible in the image, corresponding values are assigned else for every invisible or missing feature ‘0’ is assigned.