1. An apparatus for recognizing pattern data in a mobile station having a pattern data recognition function, the apparatus comprising: a pattern data sensing unit for recognizing the pattern data as brightness component Y data, high frequency component Cb data, and low frequency component Cr data, and for extracting only the brightness component Y data and the high frequency component Cb data from the pattern data when an input of the pattern data is detected; a pattern data recognizing unit for weighting the extracted brightness component Y data with a first weight, weighting the extracted high frequency component Cb data with a second weight, and then generating input data for recognizing an image according to the pattern data using the brightness component Y data weighted with the first weight, the high frequency component Cb data weighted with the second weight, and a compensation value that compensates the weighted data so that the input data is a recognizable and valid value; and a controller for controlling the pattern data sensing unit to output the extracted brightness component Y data and the extracted high frequency component Cb data to the pattern data recognizing unit and recognizing the image according to the pattern data by receiving the input data, wherein the recognized image is displayed using only the brightness component Y data weighted with the first weight and the high frequency component Cb data weighted with the second weight.