Simulation of visible/infrared sensor images

摘要

For developing an imaging system, a computer based imaging simulator that predicts the performance of the system is desired. The simulator synthesizes images by various sensors under a wide variety of field conditions in the early design stage. The advantages of eliminating unnecessary trial manufacturing and field testing under severe environmental conditions are given herewith. In the simulator described in this paper, spectral radiance of an object is assumed as being the sum of the reflection of solar irradiance and sky radiance and the emission obtained from the emissivity and temperature of an object. Wavelength bands are selected from the visible to the far-infrared wavelength region. Spatial resolution, noise, shading, ghosts, narcissus and mechanical vibration of the optical components are considered to be image degradations by the use of sensors. This paper describes the simulation procedure and illustrates synthesized images with several objects and scenarios such as wavelength band, atmospheric conditions and degradations by the use of sensors. These images show that the presented simulator is effective in determining the specifications of a desired system.