提出了一种基于加速正则化Richardson-Lucy(RL)算法的大气湍流退化图像盲复原方法(AccRLTV-IBD)。在总变分(TV)正则化RL算法的基础上,引入二阶矢量外推加速技术对其进行加速,形成加速正则化RL(AccRLTV)算法,并将该算法应用到迭代盲目反...提出了一种基于加速正则化Richardson-Lucy(RL)算法的大气湍流退化图像盲复原方法(AccRLTV-IBD)。在总变分(TV)正则化RL算法的基础上,引入二阶矢量外推加速技术对其进行加速,形成加速正则化RL(AccRLTV)算法,并将该算法应用到迭代盲目反卷积(IBD)算法中。使用长曝光大气湍流光学传递函数(OTF)的物理模型或根据图像来获取初始的点扩散函数(PSF),在灰度平均梯度(gray mean grads,GMG)的基础上定义了一个相对灰度平均梯度(relative gray mean grads,RGMG)参数作为无参考图像复原质量的评价标准.模拟图像和实际湍流退化图像复原结果表明,基于RL的IBD算法要优于基于Wiener滤波的IBD算法,并且与RL-IBD算法相比,AccRLTV-IBD收敛速度更快,复原效果更好。展开更多
There is little low-and-high frequency information on seismic data in seismic exploration,resulting in narrower bandwidth and lower seismic resolution.It considerably restricts the prediction accuracy of thin reservoi...There is little low-and-high frequency information on seismic data in seismic exploration,resulting in narrower bandwidth and lower seismic resolution.It considerably restricts the prediction accuracy of thin reservoirs and thin interbeds.This study proposes a novel method to constrain improving seismic resolution in the time and frequency domain.The expected wavelet spectrum is used in the frequency domain to broaden the seismic spectrum range and increase the octave.In the time domain,the Frobenius vector regularization of the Hessian matrix is used to constrain the horizontal continuity of the seismic data.It eff ectively protects the signal-to-noise ratio of seismic data while the longitudinal seismic resolution is improved.This method is applied to actual post-stack seismic data and pre-stack gathers dividedly.Without abolishing the phase characteristics of the original seismic data,the time resolution is signifi cantly improved,and the structural features are clearer.Compared with the traditional spectral simulation and deconvolution methods,the frequency distribution is more reasonable,and seismic data has higher resolution.展开更多
文摘提出了一种基于加速正则化Richardson-Lucy(RL)算法的大气湍流退化图像盲复原方法(AccRLTV-IBD)。在总变分(TV)正则化RL算法的基础上,引入二阶矢量外推加速技术对其进行加速,形成加速正则化RL(AccRLTV)算法,并将该算法应用到迭代盲目反卷积(IBD)算法中。使用长曝光大气湍流光学传递函数(OTF)的物理模型或根据图像来获取初始的点扩散函数(PSF),在灰度平均梯度(gray mean grads,GMG)的基础上定义了一个相对灰度平均梯度(relative gray mean grads,RGMG)参数作为无参考图像复原质量的评价标准.模拟图像和实际湍流退化图像复原结果表明,基于RL的IBD算法要优于基于Wiener滤波的IBD算法,并且与RL-IBD算法相比,AccRLTV-IBD收敛速度更快,复原效果更好。
基金supported by the PetroChina Prospective,Basic,and Strategic Technology Research Project(No.2021DJ0606).
文摘There is little low-and-high frequency information on seismic data in seismic exploration,resulting in narrower bandwidth and lower seismic resolution.It considerably restricts the prediction accuracy of thin reservoirs and thin interbeds.This study proposes a novel method to constrain improving seismic resolution in the time and frequency domain.The expected wavelet spectrum is used in the frequency domain to broaden the seismic spectrum range and increase the octave.In the time domain,the Frobenius vector regularization of the Hessian matrix is used to constrain the horizontal continuity of the seismic data.It eff ectively protects the signal-to-noise ratio of seismic data while the longitudinal seismic resolution is improved.This method is applied to actual post-stack seismic data and pre-stack gathers dividedly.Without abolishing the phase characteristics of the original seismic data,the time resolution is signifi cantly improved,and the structural features are clearer.Compared with the traditional spectral simulation and deconvolution methods,the frequency distribution is more reasonable,and seismic data has higher resolution.
