1. A system for calibrating an output of at least one sensor associated with an autonomous vehicle, the system comprising: at least one processor programmed to: receive from a camera a plurality of images representative of an environment of the autonomous vehicle; analyze the plurality of images to identify at least two recognized landmarks; determine, based on known locations of the two recognized landmarks, a value indicative of a distance between the at least two recognized landmarks; determine, based on the output of the at least one sensor associated with the autonomous vehicle, a measured distance between the at least two landmarks; determine a correction factor for the at least one sensor based on a comparison of the value indicative of the distance between the at least two recognized landmarks and the measured distance between the at least two landmarks; and apply the correction factor to a value associated with the output of the at least one sensor to obtain a corrected value to be used by the autonomous vehicle.