1. An iris recognition apparatus recognizing an iris of an eye, comprising: an image capturing unit to obtain an image of the iris; and a controller to assess the focus quality of an iris region in the iris image and determine an iris recognition target image, wherein the controller comprising; an iris image cropping unit to produce a cropped iris image based on the captured iris image; and a Laplacian image generating unit to produce a Laplacian image based on the cropped iris image and assess the focus quality of the iris region, wherein the iris image cropping unit searches for an iris position in the captured iris image and generates the cropped iris image, wherein the Laplacian image generating unit produces a blurred image of the cropped iris image and then generates the Laplacian image by computing pixel-by-pixel difference between the cropped iris image and the blurred image of it, wherein the controller comprises a Laplacian image generating unit to produce a Laplacian image based on the cropped iris image and assess the focus quality of the iris region, and wherein the controller further comprises an entropy computing unit to calculate an entropy value of the Laplacian image and assess the focus quality of the iris region.