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

Table 1

Block size table of each round plaintext image

Mod10	Block size	Mod10	Block size
0	16	5	56
1	24	6	64
2	32	7	72
3	40	8	80
4	48	9	96

Note that there is no overlap between these subblocks. In the postprocessing, these subblocks are used as units for correlated operation.