If you want to be more comfortable with it, one really cool API you should check out is Clarifai (someone else already mentioned it in this thread, but I'll bri

If you want to be more comfortable with it, one really cool API you should check out is Clarifai (someone else already mentioned it in this thread, but I'll bring it up again anyway). They're really highly regarded in terms of classification, and the API is pretty simple to use, too. Like if you just make a quick cURL request: curl -H "Authorization: Bearer {access_token}" --data-urlencode "url=YOUR_IMAGE_URL.jpg" "https://api.clarifai.com/v1/tag/" ...you get the top 20 tags for that image and their confidence levels, too. Their homepage at Clarifai.com has a pretty good demo that lets you see it in a more visual way.