Table 1: Time consumption comparison of the Split-Bregman method with traditional gradient descent method.

MethodsCPU time of every step (s)Total CPU time (s)Iteration number
FirstSecondThirdFourthFifthFirstSecondThirdFourthFifthFirstSecondThirdFourthFifth

Traditional gradient descent3.1072.9543.0773.0943.102372.86147.73153.80495.12465.281205050160150
Split-Bregman method2.4462.1812.2232.2892.314122.3843.6445.81137.32138.855020206060