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I had an idea for a better Captcha many years ago for my Uni final project, but went with a different idea in the end. Mine was a list of boxes with similar pi
by Sarkie 12y ago
I had an idea for a better Captcha many years ago for my Uni final project, but went with a different idea in the end.
Mine was a list of boxes with similar pictures in them, and ask the users a question.
* Choose the only dog
* Choose the cars
* Choose everything but the men in these pictures
Microsoft then created something similar a few years later but then killed it, I still think this was a better way than OCR type stuff.
http://research.microsoft.com/en-us/projects/asirra/ http://research.microsoft.com/en-us/projects/asirra/
- makomk 12y agoThe trouble is that a well-trained AI can currently slightly beat humans on this kind of classification test, and it also requires a lot of pictures if you don't want it to be trivially broken just by enumerating them all.
- hrjet 12y agoThe image classification yes, but if the questions are worded intricately, then it might still be a challenge for bots.
- Houshalter 12y agoYou would spend more effort wording the questions than a spammer would paying people to solve them on mechanical turk, then storing the answer if it ever comes up again.
- TorKlingberg 12y agoYou need a huge database of images classified as dog, car, man etc, otherwise a spammer can download all your images and classify them manually. If you grab images from Google Images, the spammer can do the same thing.