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Table 5 Computational time costs for Lena with by FJLT, RI-FJLT and NMF-NMF-SQ hashing algorithms.

From: An Extended Image Hashing Concept: Content-Based Fingerprinting Using FJLT

Computational cost

FJLT

RI-FJLT

NMF-NMF-SQ

time (s)

1.93

2.43

5.55