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Table 1 Fusion approaches at the various multi-modal biometric system levels

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