A New V-Net Convolutional Neural Network Based on Four-Dimensional Hyperchaotic System for Medical Image Encryption

Table 7

Plaintext sensitivity test results.

Method	NPCR	UACI
FRFS	99.5651	30.9132
ASFS	99.5998	33.4602
CENN	99.6188	33.4823
Proposed	99.6102	33.4659