Efficient payload communications for IoT-enabled ViSAR vehicles using discrete cosine transform-based quasi-sparse bit injection

EURASIP Journal on Wireless Communications and Networking

Table 2 Complexity analysis through execution times (best results are shown in italicized form)

Methods	Patch size	Execution times (s)
Methods	Patch size	Time elapsed for image transformation	Time elapsed for bit embedding process	Total time
IBDH method in [3]	1 × 1	0	7.48	7.48
IBDH-DCT (proposed)	2 × 2	11.92	5.37	17.29
	4 × 4	7.16	6.96	14.12
	8 × 8	5.95	10.40	16.35
	16 × 16	4.98	6.41	11.39
	32 × 32	5.41	6.34	11.75
	64 × 64	4.82	6.45	11.27
	128 × 128	4.97	5.97	10.94
	256 × 256	4.84	9.13	13.97