1. A method for verifying detection of a first object partially occluded by a second object relative to a vehicle, the method comprising: receiving image information via an image input device; determining a first detection window bounding a first image in the image information corresponding to the first object; determining a second detection window bounding a second image in the image information corresponding to the second object; determining whether the first window and the second window overlap; determining a first distance to the first detection window and a second distance to the second detection window; comparing the first distance to the second distance, and if the first distance is greater than the second distance, verifying that the first object is partially occluded by the second object.