Table 1. The geometrical and physical entropies of different coding patterns on a metasurface.

Coding pattern	Geometrical entropy	Physical entropy
Figure 2a	0.0000	0.9273
Figure 2b	0.0439	1.3923
Figure 2c	0.0369	1.8047
Figure 2d	0.0566	2.0467
Supplementary Fig. S2a	0.2474	1.5996
Supplementary Fig. S2b	0.3522	1.7200
Supplementary Fig. S2c	0.4798	2.1795
Supplementary Fig. S3a	0.5744	2.4144
Supplementary Fig. S3b	0.5111	2.3485
Supplementary Fig. S3c	0.6193	3.2114
Figure 3c	0.7780	4.6413