Abstract
As a robust criterion to evaluate the complex degree of infrared (IR) backgrounds, the variance weighted information entropy (WIE) is applied to preprocess the IR small target images and detect the sea-sky line in sea-sky IR images. Experimental results show that the local variance WIE filter can evidently increase the signal-to-noise ratio of preprocessed images. In addition, the validity of the variance WIE based sea-sky line detection method is verified by experiments.
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