Patent ID: 8581984

Claim:
A vehicle circumference monitor apparatus in a vehicle, the apparatus comprising: a plurality of in-vehicle cameras arranged such that at least a part of a capture target of one in-vehicle camera does not overlap with a capture target of an other camera, each of the in-vehicle cameras capturing an image of a vehicle circumferential area outside of the vehicle and outputting an analog-state video signal of the captured image via a corresponding signal cable; an electronic control unit including an image combination section to generate a composite image by a combination to combine images originating from the in-vehicle cameras based on video signals inputted via the signal cables from the in-vehicle cameras; and a display device to display the composite image generated by the image combination section, the electronic control unit further including an amendment amount determination section to determine an amendment amount with respect to the analog-state video signal originating from each of the in-vehicle cameras based on analog signals included in the analog-state video signals inputted via the signal cables from the in-vehicle cameras, in order to make uniform signal levels of the analog-state video signals originating from the respective in-vehicle cameras, wherein the electronic control unit further includes a signal level estimation section to estimate a difference in signal level among video signals originating from the in-vehicle cameras based on analog signals inputted via the signal cables from the in-vehicle cameras; and the amendment amount determination section determines an amendment amount with respect to a video signal originating from each of the in-vehicle cameras based on the difference in signal level estimated by the signal level estimation section, in order to make uniform the signal levels of the analog-state video signals originating from the in-vehicle cameras.