基于共聚焦点的虚拟场景可视化成像方法仿真

Simulation of Virtual Scene Visualization Imaging Method Based on Co-Focus

在实现虚拟场景可视化成像过程中,由于当前方法没有充分考虑大气作用对目标场景的散射、吸收等影响,导致最终可视化成像结果与真实场景存在较大偏差,可行性较差的问题。为解决上述问题,提出了基于共聚焦点的虚拟场景可视化成像方法。方法依据大气辐射理论,建立并求解大气辐射传输方程,并利用大气调制传递函数描述大气作用的效果模拟大气作用,有效消除了大气作用对虚拟场景可视化成像质量的影响。在此基础上,建立了WRW模型,给出了震源面炮组合与震源面检波组合计算公式,可以在虚拟场景地震数据中消除采集效应和传播效应的干扰影响,实现虚拟场景震源反射信息估计、震源激发聚焦,以及检波聚焦,获得虚拟场景共聚焦点的可视化成像结果。仿真结果表明,所提方法能够实现复杂地表界面模型的可视化成像,模拟的地震波速与真实地震波速值误差较小,有效消除了大气作用对虚拟场景可视化成像质量的影响,获得了高质量的成像结果,具有可行性。

During the virtual scene visualization,the current method ignores the influence of atmospheric effect on the scattering and absorption of target scene.The final visual imaging result is greatly deviated from the real scene.Meanwhile,the feasibility is poor.In this paper,a visualization imaging method of virtual scene based on common focus point was presented.Based on the theory of atmospheric radiation,this method established and solved the atmospheric radiation transfer equation.And then this method used the atmospheric modulation transfer function to describe the effect of atmospheric action and simulate the atmospheric effect,so that the influence of atmospheric action on visualization imaging quality of virtual scene was effectively eliminated.On this basis,the WRW model was established and the formulas of gun combination and the detection combination of seismic source surface were given,which could eliminate the interference effect of acquisition effect and propagation effect in the virtual scene seismic data.Thus,information estimation of virtual scene source reflection,excitation focusing of seismic source and detection focusing were achieved.Finally,the visualization imaging result of virtual scene based on common focus point was obtained.Simulation results show that the proposed method can realize the visualization imaging of complex interface model.Meanwhile,the simulated seismic wave velocity has less error with actual seismic wave velocity.This method effectively eliminates the influence of atmospheric action on the visualization imaging quality of virtual scene and obtains the imaging result with high quality.Thus,it is feasible.