论文标题
基于仿射转化估计
Space-variant Shack-Hartmann wavefront sensing based on affine transformation estimation
论文作者
论文摘要
空间变化的波前重建问题固有地存在于深层组织成像中。在本文中，我们提出了一个带有扩展源照明的Shack Hartmann Wavefront空间变化的框架。空间变化的波前被建模为一个四维函数，其中空间域中的二维构成，而在傅立叶域中有两个尺寸，均较大变化的先验。在这里，使用AffinTransFormation来表征波前空间变化函数。相应地，Zonaland模态方法都升级以适应四维表示和重建。与常规空间不变的相关方法相比，相比，示例和仿真显示了空间变化的波前重建精度的双重到四倍的改进。
The space-variant wavefront reconstruction problem inherently exists in deep tissue imaging. In this paper,we propose a framework of Shack-Hartmann wavefront space-variant sensing with extended source illumination. The space-variant wavefront is modeled as a four-dimensional function where two dimensionsare in the spatial domain and two in the Fourier domain with priors that both gently vary. Here, the affinetransformation is used to characterize the wavefront space-variant function. Correspondingly, the zonaland modal methods are both escalated to adapt to four-dimensional representation and reconstruction.Experiments and simulations show double to quadruple improvements in space-variant wavefront reconstruction accuracy compared to the conventional space-invariant correlation method.
