A few simple OpenCV projects like Face detector, Number Plate detector, Paper warp perspective, and virtual light pen.
The haar cascade used for face detection and number plate detection can be found here. [https://github.com/opencv/opencv/tree/master/data/haarcascades]. The one used for face detection is "haarcascade_frontalface_default.xml" and "haarcascade_russian_plate_number.xml" for number plate detection.