Abstract
Detection of an object exposed to natural environmental conditions can be performed by using an IR sensor. In this instance the radiant contrast between the object and the background is an important parameter. There are various ways of estimating the radiant contrast developed for many types of backgrounds. To estimate the radiant contrast accurately it is necessary to reflect the near field background effectively. In this study we propose a radiation contrast estimation method called the inverse distance weighted method and this is compared with the existing methods as the areal intensity method and the row pixel method. Comparisons are made for two different types of backgrounds including the municipal and the oceanic scenes. From this study we conclude that the method called the inverse distance weighted method suggested in this study most effectively reflects the near field effect of the background around the object.
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