Image Enhancement via Special Functions and Its Application for Near Infrared Imaging

Image enhancement is important given that it can be used to highlight the area of interest in images. This article designs four filters via special function for realizing image enhancement. Firstly, a filter based on exponential designed. When value progression even, edge feature extracted. odd, sharp contrast obtained. Secondly, built using hyperbolic cosine and its inverse function, where printmaking Thirdly, made secant inverse. It lead extraction edge. increasing, marginal effect found brightness decreasing. Ripple morphology found. Fourthly, constructed through sine inverse, features Furthermore, these are useful extracting even when high noise density 0.9 added original They highlighting images acquired from near infrared imaging.