Determining height of a roof load using captured and superimposed images

摘要

The invention comprises apparatus and method for determining a height of a roof load of a vehicle. The apparatus is operable to: display a captured image 110 of at least a portion of the vehicle and roof load 150 on a display means of the apparatus; superimpose a vehicle overlay 210 on the image, wherein a dimension of the overlay corresponds to a known dimension of the vehicle; and allow a user to manipulate the vehicle overlay to obtain a correspondence between the dimension of the overlay and the at least a portion of the vehicle. The apparatus is further operable to calculate a height of the roof load and to provide an output corresponding to the calculated height. The overlay image could be specific to the vehicle and may be derived from a license plate number, VIN etc.. The overlay image could be a wire-frame image. The user may be required to indicate the position of the upper boundary of the roof load.