EURASIP Journal on Information Security

Table 5 QBSD measurement of the same images reconstructed with and without pixel expansion, m=4

From: A novel quality assessment for visual secret sharing schemes

QBSD	Symbol			Square
values	T	Letters	Baboon	sign	Portrait	Zebra
Quality	Very			Very
rank	good	Good	Fair	good	Good	Poor
Size invariant
Reconstruction	0.80	0.78	0.73	0.83	0.77	0.70
Reconstruction
With expansion	0.82	0.81	0.79	0.84	0.80	0.76

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