Detecting and Counteracting Atmospheric Effects
With the increasing use of vision systems in uncontrolled environments, reducing the effect of atmospheric conditions such as fog in images has become a significant problem. Many applications (e.g., surveillance) rely on accurate images of the objects under scrutiny [Brooks 98]. Poor visibility is an issue in aircraft navigation [Huxtable 97, Moller 94, Oakley 96, Sweet 96], highway monitoring [Arya 97], and commercial and military vehicles [Barducci 95, Pencikowski 96]. Figure 11.1 shows an example scene from a visible spectrum camera where the presence of fog severely impedes the ability to recognize objects in the scene. Building in foggy conditions, visibility of objects is impaired.