Yu Xuelian, Wang Zhengxian, Cheng Xukun, Zhao Lihang, Li Xiufang, Sun Yanqian
Opt Lett. 2024 Feb 1;49(3):482-485. doi: 10.1364/OL.507946.
Nonlinear reconstruction, which is based on the principle of cross correlation, is a commonly employed reconstruction technique in incoherent correlated digital holography systems. However, the modulation of phase masks in these systems is suppressed during the reconstruction process, resulting in an inability to express the characteristics of the phase masks. Consequently, achieving edge enhancement within these systems is constrained. We propose a nonlinear reconstruction method utilizing Laguerre-Gaussian superimposed vortex filters, which modulates the spectrum of the target during the reconstruction process. Experimental results demonstrate that this method performs well in reconstructing image edges for various phase-masked incoherent imaging systems and effectively suppresses noise. Additionally, this method enables directional edge enhancement.
基于互相关原理的非线性重建是非相干相关数字全息系统中常用的重建技术。然而，在这些系统中，相位掩模的调制在重建过程中受到抑制，导致无法表达相位掩模的特性。因此，在这些系统中实现边缘增强受到限制。我们提出了一种利用拉盖尔-高斯叠加涡旋滤波器的非线性重建方法，该方法在重建过程中对目标频谱进行调制。实验结果表明，该方法在重建各种相位掩模非相干成像系统的图像边缘方面表现良好，并能有效抑制噪声。此外，该方法还能实现定向边缘增强。
