1. A method for detecting a touch point, the method comprising: detecting an edge image of a finger image from an input image; generating a touch point image utilizing the detected edge image; and calculating coordinates of the touch point from the touch point image, wherein, in the generating of the touch point image utilizing the detected edge image, the touch point image is generated utilizing a gradient direction and gradient magnitude values obtained from the detected edge image, wherein, in the generating of the touch point image utilizing the detected edge image, the touch point image is generated by accumulatively summing up the gradient magnitude values with respect to a position separated by a set distance in the gradient direction of the detected edge image, and wherein the generating of the touch point image utilizing the detected edge image comprises: setting a center at a position separated by the set distance in the gradient direction with respect to a position where the edge image is detected; and generating the touch point image by summing up the gradient magnitude values with respect to a set area based on the set center.