Yan Jiapu, Ye Zhichao, Jiang Tingting, Chen Shiqi, Feng Huajun, Xu Zhihai, Li Qi, Chen Yueting
Opt Express. 2023 Oct 23;31(22):35765-35776. doi: 10.1364/OE.500967.
Alvarez lenses are known for their ability to achieve a broad range of optical power adjustment by utilizing complementary freeform surfaces. However, these lenses suffer from optical aberrations, which restrict their potential applications. To address this issue, we propose a field of view (FOV) attention image restoration model for continuous zooming. In order to simulate the degradation of optical zooming systems based on Alvarez lenses (OZA), a baseline OZA is designed where the polynomial for the Alvarez lenses consists of only three coefficients. By computing spatially varying point spread functions (PSFs), we simulate the degraded images of multiple zoom configurations and conduct restoration experiments. The results demonstrate that our approach surpasses the compared methods in the restoration of degraded images across various zoom configurations while also exhibiting strong generalization capabilities under untrained configurations.
阿尔瓦雷兹透镜以其通过利用互补自由曲面实现广泛的光焦度调节能力而闻名。然而，这些透镜存在光学像差，这限制了它们的潜在应用。为了解决这个问题，我们提出了一种用于连续变焦的视场（FOV）注意力图像恢复模型。为了模拟基于阿尔瓦雷兹透镜（OZA）的光学变焦系统的退化，设计了一个基线OZA，其中阿尔瓦雷兹透镜的多项式仅由三个系数组成。通过计算空间变化的点扩散函数（PSF），我们模拟了多种变焦配置的退化图像并进行恢复实验。结果表明，我们的方法在各种变焦配置下的退化图像恢复方面优于比较方法，同时在未训练的配置下也表现出强大的泛化能力。
