A VQ-Based Joint Fingerprinting and Decryption Scheme for Secure and Efficient Image Distribution

Table 1

PSNRs under various L with method in [14] and the proposed method.

PSNRs (dB)
Size	images	Lena	Plane	Baboon	Boat	Pepper	Barbara
L=256	Fingerprinted [14]	29.96	29.23	23.73	27.95	29.17	24.82
	Fingerprinted (Proposed)	30.60	29.69	23.91	28.41	29.63	25.12
	Original; VQ	31.36	30.57	24.37	29.38	30.72	25.80
L=512	Fingerprinted [14]	30.81	30.11	23.99	28.78	29.93	25.31
	Fingerprinted (Proposed)	31.23	30.43	24.26	29.13	30.24	25.67
	Original; VQ	32.24	31.57	24.70	30.15	31.40	26.38
L=1024	Fingerprinted [14]	31.67	30.72	24.32	29.55	30.83	25.97
	Fingerprinted (Proposed)	32.17	31.16	24.57	30.05	31.15	26.21
	Original; VQ	33.20	32.23	25.03	30.88	32.13	27.05