From: MultiQ: single sensor-based multi-quality multi-modal large-scale biometric score database and its performance evaluation
Level of fusion
Fusion approach
Sensor-level fusion
Mosaicing
Feature-level fusion
Feature concatenation
Score-level fusion
Transformation-based approaches [12, 38–40]
Classification-based approaches [16, 28, 41]
Probability density-based approaches [13–15, 17, 44]
Decision-level fusion
Majority voting