Abstract: This paper, based on imaging model, uses illumination model and atmosphere model to research the relation among date, geographical position and sun position, and the relation between sunlight and sun position under condition of the different climate. Then according to the climate, geographical position and date, sunlight of the scene surface can be determined. By already-known DEM, viewpoint and reference map, terrain optics image under condition of the different climate and time can be realistically simulated.

Key words: imaging model, illumination model, terrain optics image, image simulation

摘要： 从成像模型出发，利用光照模型和大气模型，研究时间、地理位置与太阳位置之间的关系，以及不同气候条件下日照与太阳位置之间的关系。根据气候、地理位置、时间确定景象表面的日照(它等于太阳光照和天空光照的表示)，在已知高程图、视点和参考地图的条件下，能够较逼真地模拟产生不同气候条件及不同时间下的数字地面光学图像。

关键词: 成像模型, 光照模型, 地面光学图, 图像模拟

CLC Number: 

• TP391