Numerical results Denoised by DTCWT 900 70 防科学时太季 A Direct Numerical Imaging Method 32 National University of Defense TechnologyA Direct Numerical Imaging Method Numerical results 32 0 10 20 30 40 50 60 70 80 90 100 0 100 200 300 400 500 600 700 800 900 1000 Denoised by DTCWT