1. A camera calibration apparatus, comprising: an image reception unit for receiving images, in which a same background is captured, from respective cameras placed at locations which are different from each other; a camera calibration unit for calculating an entire matrix using canonic homographies for all parallelograms located on respective surfaces which are different from each other within each of the images, and calculating infinite homographies between the cameras using the entire matrix at a same time; and a matrix generation unit for calculating sub matrixes in such a way to multiply size adjustment parameters by each of the corresponding canonic homographies.