Parallel Digital Watermarking Process on Ultrasound Medical Images in Multicores Environment

Table 7

Sequential versus parallel watermarking authentication process in elapsed time.

Input file (watermarked ultrasound medical images that have been fully tampered)	Tampered frame/total frame	Elapsed time in watermarking authentication process (seconds)		Speedup	Output file (tampered; ultrasound file recovered as; original ultrasound file)
		Sequential	Parallel
Tampered_Watermarked_US1	30/30	597.1	164.2	3.64	Recovered_US1.dcm
Tampered_Watermarked_US2	15/15	270.0	92.6	2.92	Recovered_US2.dcm
Tampered_Watermarked_US3_a	15/15	241.2	73.3	3.29	Recovered_US3_a.dcm
Tampered_Watermarked_US3_b	15/15	259.1	71.0	3.64	Recovered_US3_b.dcm

Tampered_Watermarked_US3_a and Tampered_watermarked_US3_b are from the same source but have tampered differently.