1. An object image detection device for detecting one or more object images from an input image, comprising: a reference object image classification unit configured to determine whether an object image is included in an image having a predetermined orientation; an image orientation detection unit configured to detect an orientation of the input image; an image rotation unit configured to read parameters used in the reference object image classification unit and an angle of object images of the reference image classification unit and rotate the parameters in response to the angle of the object images to generate an image classification unit adapted to the detected orientation; and a detection unit configured to detect and extract at least one of position information and size information of the object images from the input image based on the generated image classification unit for display on an image output unit.