Sonar Image Target Detection Based on Deep Learning

Table 3

Comparison of search volume between optimization methods and direct methods.

Number of frequency points	8	15	20	25	30	35	40
Optimization	3200	7000	8000	1000	12000	14000	16000
Direct calculation	400^8	400^15	400^20	400^25	400^30	400^35	400^40