基于折线采样的高分辨率成像系统设计

针对现有的提高线阵电荷耦合器件(CCD)成像系统的图像空间分辨率的方法存在的不足,提出了一种新的采样模式,并设计了一种高分辨率成像系统。该系统利用两个相同的线阵CCD相机进行特定的空间排列,即使得相机1和相机2的CCD阵列都倾斜θ来进行扫描取像,并利用图像校正和像素插值等图像重建方法,得到高分辨率的图像。实验结果表明,倾斜角取60°的情况下,相对于单个线阵相机在θ=0°的正常采样模式下得到的采样图像,图像的空间分辨率提高了1倍,且保持了成像的视野不变。本系统工程上实现简单,十分经济且便于维护,仅利用现有的成像装置即可获取更高分辨率的图像。

Design of High-Resolution Imaging System Based on Doglegged Sampling

For the shortcomings of methods used to improve the image spatial resolution of current linear charge coupled device (CCD) imaging system, a new sampling method is proposed, and a high-resolution imaging system is designed. Two same linear CCD cameras are fixed with specific spatial arrangement, namely both camera 1 and camera 2′s CCD scan the object with a tilt angle θ, and image correction and pixel interpolation are also used for getting high-resolution image. The experimental results show that, compared with the regular scanning mode equipped with a signal camera and θ=0°, in our method cameras with slant angle θ=60° enables the image spatial resolution doubled, and keeps the field of view unchanging. It is easy to realize the designed system in engineering, very economical and convenient to maintain it, and only using the existing imaging device to obtain higher-resolution images.