This is cool I remember trying to build a chrome extension for something like this a while ago for detecting and blocking images of animals people had phobia's for (e.g snake, spider and e.t.c) and I tried using pythons dlib object detector and shape landmarks predictor and it was a very stressful exercise in futility. Now I will have a look at mark r-cnn as it might help solve my problem and my few minutes of total brain fuckery after unlucky seeing a picture or a video with any kind of snakes in it, the big one's are of course worse.