OpenCV Cascades collected from the internet.
- OpenCV's supplied cascades : https://github.com/opencv/opencv/tree/master/data/haarcascades
- Andrew Sorbal's Cars : https://github.com/andrewssobral/vehicle_detection_haarcascades
- Mallick's Minified Cascades : https://github.com/spmallick/mallick_cascades
- Brad Philip and Paul Updike bradpaul_cars.xml : https://github.com/ozcanovunc/opencv-samples