Figure 3From: Binary Biometric Representation through Pairwise Adaptive Phase QuantizationThe bits extraction framework based on two-dimensional quantization and coding, where D denotes the number of features; K denotes the number of feature pairs; c k denotes the feature index for the kth feature pair (k=1,…,K); s k denotes the corresponding quantized bits. The final output binary string is S=s 1 s 2 s K .Back to article page