摘要
CCD探测器的像元尺寸一般来说是光学系统弥散斑的几倍,把以CCD探测器为接收器的光学成像系统看作是空间移不变系统会带来一定理论上的近似,采用计算机仿真的方法来研究在空间移变条件下的TDICCD遥感相机的影像分辨力和像质问题,结果是:在目标条带宽度一定时,像元尺寸为a,像?
CCD pixel dimension is several times of optical system blur. If the optical system with CCD sensor is regarded as a spatially invariant linear system, the convolution of point spread function will results in theoretical error of an object image. The image quality and resolution of TDICCD sensor is analyzed by computer simulation. The simulation results show that, when the bar width is a constant and pixel dimension is a, the image motion is a/3, a/2, and a, then MTF is 0.918, 0.876, 0.753, respectively; when MTF is a constant, image motion is a/3, a/2 and a, the bar width is 36, 38, 44, respectively. When the image motion is more then a/3, and Angle=0 and Angle≠0, the difference of MTF is less then 1%. An engineering applicable concision function referring to pixel dimension, image motion, resolution and MTF is obtained.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2005年第8期52-55,共4页
Opto-Electronic Engineering
关键词
像移
CCD探测器
像质
图像分辨力
Image motion
CCD detectors
Image quality
Image resolution
