Variance WIE based infrared images processing

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.