Patent ID: 8229168

Claim:
A method for identifying vehicles, comprising: capturing a first image of a first vehicle using a first camera at a first position and a second image of the first vehicle using a second camera at a second position different from the first position; determining a transformation between the first image and the second image; capturing a third image of a second vehicle using the first camera; applying the transformation to the third image to generate a fourth image of the second vehicle; and analyzing the fourth image using a database of identified vehicles to determine an identity of the second vehicle; capturing a fifth image of a third vehicle using the first camera and a sixth image of the third vehicle using the second camera; determining an alternate transformation between the fifth image and the sixth image; and determining a mean transformation as an average of the transformation and the alternate transformation, and wherein applying the transformation comprises applying the mean transformation; capturing a seventh image of a fourth vehicle using the first camera and an eighth image of the fourth vehicle using the second camera; determining a further transformation between the seventh image and the eighth image; and determining if the further transformation exceeds the mean transformation by a preset threshold; and comprising, in response to a positive determination that the further transformation exceeds the mean transformation by the preset threshold, identifying a change in an imaging parameter of one camera chosen from the first camera and the second camera.