Phase Congruency Based Image Enhancement Method And Its Application in Enhancing Iris Feature Extraction

In many iris image related applications it is necessqry to detect certainfeatures of the image for the application processing .The two main features that are mostly used for the above purposes are the edges and the corners of the iris image. The problem with the majority of well-known detection methods is their extretne dependence on the image contrast and the brightness state in which the images have been taken So it rs necessary to find methods that enhance the image in such a way that the fficts of contrast and brightness changes are reduced to minimum by them. The method ttsed in this paper is based on phase congruency method for enhancing the corners and edges of the iris image. The independence of phase patterns from the contrast is the most attractive point of this method.