3. Multiples .o Seismic data acquistion by high density ◇ Noise attenuation ◆ random noise a Temporal-space filtering avele t ◆ coherent noise 口 region filtering 口 Radon transfor 口 beamforming (過两科学大季 A Direct Numerical Imaging Method 24 National University of Defense TechnologyA Direct Numerical Imaging Method 3. Multiples ❖ Seismic data acquistion by high density ❖ Noise attenuation ◆ random noise ❑ Temporal-space filtering ❑ wavelet, … ◆ coherent noise ❑ region filtering ❑ Radon transform ❑ beamforming ❑ … 24