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Udacity labeled set https://github.com/udacity/self-driving-car/tree/master/annotations
GTI vehicle image database — http://www.gti.ssr.upm.es/data/Vehicle_database.htmlKITTI vision benchmark suite — http://www.cvlibs.net/datasets/kitti/
These images have to be extracted from real world videos and images, and correctly labeled. Udacity provided 8.792 images of car and 8.968 images of non-cars, from sources listed in the attachments. The images have 64 x 64 pixels.