1. An apparatus for recognizing a movement of a subject, the apparatus comprising: a light source configured to emit light to the subject; a single image sensor configured to receive light reflected from the subject; and a processor configured to, detect a pixel that receives the reflected light, the pixel being in a pixel array of the single image sensor, and track the movement of the subject based on a change in a position of the detected pixel, wherein a pattern of the movement of the subject is reflected in changes in the position of the detected pixel in the single image sensor, and the processor is further configured to recognize the pattern according to the changes in the position of the detected pixel in the single image sensor and to calculate a distance by which the subject moves based on an amount of the changes in the position of the detected pixel in the single image sensor.