Top 4 viola-jones open source projects

Feature Detection based on Haar Cascades in PHP (Viola-Jones-Lienhart et al Algorithm)

A face detection algorithm using Viola-Jones' rapid object detection framework written in Julia

Computer Vision model to detect face in the first frame of a video and to continue tracking it in the rest of the video. This is implemented in OpenCV 3.3.0 and Python 2.7

Training a face detection cascade using Adaptive Boosting after Viola and Jones.