A vehicle device includes a video acquisition unit configured to acquire videos captured by cameras configured to capture surroundings of a vehicle; a light emission controller configured to control light emission of a light beam pattern which is emitted by light emitting devices and with which the ground is irradiated at certain positions with respect to the vehicle; an image processing unit 24 configured to generate, using the videos acquired, a bird's-eye view video including the light beam pattern; a superimposing image generation unit configured to generate a superimposing image at a position corresponding to the light beam pattern included in the bird's-eye view video; and an image determination processing unit 27 configured to detect, in the bird's-eye view video, an overlapping portion of the superimposing image and an image of the light beam pattern and determine whether camera parameters for generating the bird's-eye view video are accurately calibrated.