Outline 1 Introduction and motivation .A 2. Direct imaging for point/extended targets ◆ Algorithm Numerical results 3 Multiple attenuation in seismic signal 今4. Future work (過两科学大季 A Direct Numerical Imaging Method National University of Defense TechnologyA Direct Numerical Imaging Method Outline ❖ 1. Introduction and motivation ❖ 2. Direct imaging for point/extended targets ◆ Algorithm ◆ Numerical results ❖ 3. Multiple attenuation in seismic signal ❖ 4. Future work 2