提高数字图像的分辨率一直是一个热门话题,在现代高技术战争中发挥着重要的作用。从CCD成像原理出发,分析了1/2像素错位的低分辨率图像与高分辨率图像各像素灰度值之间的对应关系,提出了一种新的提高CCD成像分辨率的方法。通过多次移动CCD获得多幅低分辨率图像,按照介绍的算法合成一幅高分辨率图像,达到了CCD分辨率提高多倍的目的,算法的本质是使一超定解多元方程组变成有唯一解的方程组。通过仿真实验和分析表明:所建立的提高分辨率的方法是正确的,分辨率可以提高2倍、3倍甚至更高在理论上是可行的,而计算时间的复杂度远远小于其它方法。

Improvemnet of imaging resolution is a hot topic, it plays the important role in modern war. The relation of pixel gray-level of low resolution images and high resolution image is found based on charge coupled device (CCD) imaging theory, and a new approach for improvement of CCD imaging resolution is proposed. A high resolution image is obtained by moving multi-shift images with low resolution, the objective of improvement of CCD resolution for many times is attained. Making the indeterminate equation into unique-value equation is the essence of this approach.The simulation examples show that the approach for improvemnet of CCD imaging resolution is right, resolution can be improved 2 times, 3 times and even N times in theory. In addition, operation time is lower than other methods.