Abstract: A database structure for detecting a vehicle includes a first database, in which a semantic region model is stored in connection with pixel locations in an image as a region that a moving object is located; and a second database, in which size templates for obtaining a sub-image of the moving object to be compared to information stored in a classifier are stored in correspondence to the semantic region model. According to the present disclosure, an automated method of inexpensively, quickly, and accurately detecting a vehicle with a small amount of calculations may be provided.