空基下视时序影像瞬时成像模型研究

Study on Instantaneous Imaging Model of Aerial Time Series Images

物方空间的物体随着时间的推移进行着绝对运动,运动导致了相对位置的变化,时间序列影像记录了物方三维空间的动态变化。本文基于下视时间序列影像的动态特性,在共线方程中引入时间元素,提出了空基下视时间序列影像瞬时成像模型,描述了动态"物像"间的瞬时投影关系;针对地表不同类型动态物体,构建了"由像到物"的应用模型,实现了从像方动态特征计算地表物体特征的目的。通过仿真和真实航空下视序列影像的试验与分析,验证了序列影像瞬时成像模型能够定量计算像地动态特征。

Object in the object space is moving absolutely with the time. The differences of movement caused the changes of the relative position. Time series images recorded the dynamic changes of the object space. Based on the dynamic characteristics of time series images, this paper introduced the time element to the colliuear equation and derived instantaneous imaging model of time series images in order to describe the dynamic relationship between the object space and image space. This paper established the application model which different dynamic object can extract the motion features or elevation information from the dynamic image characteristics. Through simulation and analysis of real aerial image sequences test, it is shown that the instantaneous imaging model of time series images proposed in this paper can quantitatively calculate the mapping relationship between the image and the object.