1. A stereo source image calibration method comprising: receiving an input of a stereo source image, and extracting features respectively from left and right source images; generating feature correspondence information by matching the features, extracted respectively from the left and right source images, with each other; generating a vertical disparity map with respect to the left and right source images, based on a difference between coordinate values from the feature correspondence information; and calibrating a difference between the left and right source images by using the generated vertical disparity map.