1. A method comprising: receiving an image from a camera; comparing one or more parameters of the image with one or more control parameters, wherein the one or more control parameters comprise information indicative of an image from a substantially unobstructed camera; based on the comparison, determining a score between the one or more parameters of the image and the one or more control parameters; accumulating, by a computing device, a count of a number of times the determined score exceeds a first threshold; and based on the count exceeding a second threshold, determining that the camera is at least partially obstructed.