15 July 1997 Scene simulation under different weather
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Abstract
Gray level of image is greatly influenced by weather conditions if a TV camera is used out of doors. In this paper, relationships between gray level and weather conditions are addressed. First, by using daylight model, daylight distribution of scenes at different time and different weathers can be estimated by using an empiric formula. Subsequently, an image model of daylight is founded after analyzing a great deal of the experimental results. In this model, average gray level of image and its variance in a homogeneous region can be predicted if some parameters are determined by the experiments in advance. Finally beginning from the simplification of imaging model, a normalized gray level invariant is derived which can provide a scene simulation approach under different weather conditions if one of the corresponding image of the same scene at one weather is known. The experiment results demonstrate the feasibility of our theoretical analysis and are promising.
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Mingyue Ding, Mingyue Ding, Yadong Wang, Yadong Wang, Jiaxiong Peng, Jiaxiong Peng, } "Scene simulation under different weather", Proc. SPIE 3085, Modeling, Simulation, and Visualization of Sensory Response for Defense Applications, (15 July 1997); doi: 10.1117/12.280975; https://doi.org/10.1117/12.280975
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