1. A method comprising: receiving, by a computing device, an image from a camera; comparing, by the computing device, one or more parameters of the received 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, by the computing device, a difference score between the one or more parameters of the received image and the one or more control parameters; accumulating, by the computing device over a plurality of received images, a count of a number of times the determined difference score exceeds a difference score threshold; and based on the count over the plurality of received images exceeding a count threshold, determining, by the computing device, that the camera is at least partially obstructed due to one or more particles accumulated on a lens of the camera, wherein the count threshold is greater than two.