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Do OCR on every frame, perform majority voting on the result. You just made the spammer's task easier.
Here is an example of a problem that would be hard for computer to solve: http://www.youtube.com/watch?v=4G4y79ZbaBs
Earlier quoted context omitted.
Do OCR on every frame, perform majority voting on the result. You just made the spammer's task easier.
Here is an example of a problem that would be hard for computer to solve: http://www.youtube.com/watch?v=4G4y79ZbaBs
I have no expertise in this area, but how about patterns? Since we're already parsing so much text, why not take strings of legible text (with a minor visual distortion), and strip a connecting word such as a preposition? The user is then prompted to enter the connecting word. Synonyms could be matched. For example: "I can't stand all ____ your lies" (of) or: "This is all too ____ for me to handle!" (much) Sure, some…
Then pick the first search result where there is a single word between the segments.
I had just noticed that captchas were getting worse. I always thought sites should just make the user perform an operation. Display a hard to read but still legible "type the second letter of the third word". 'e' would be the correct response. There's got to be a reason this isn't done already, does someone know why?
Or how about short stories, something like; "Brian came home very late. He couldn't find Mr. Hat. While he was thinking where his cat might be, he noticed the window was wide opened." What's the name of the cat? I don't know if it's hard or easy to guess it algorithmically.
That was the problem with all the "kitten captchas" etc. Very limited image database.
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Sure, but you shouldn't undermine the mission of successfully recording words that can't be identified. It's a pretty noble goal, actually.
I, for one, refuse to be used as the source of free labor by Google just because I want to sign up for a website.
It's easy to criticize captchas. That's why there are so many articles like this, which we all knowingly nod along to as we read. It's much harder to provide productive criticism that leads to an actual improvement over the status quo. (Although it is easy to suggest bad alternatives to captchas, which is why they appear in every comment thread about captchas on Hacker News, including this one.)
Take a look at our product at areyouahuman.com We launched in January and are using games to make them easier for people. Some of our early testing showed captchas can decrease signups by up to 25% and we're able to recover almost all of that. We also monitor how you play the game (like mouse movement) so we can ramp up our security without having to make the task more difficult for people. Read more here http://arey…
This wouldn't work for many forums, but if it's local, you really don't need to open it to the world.
Earlier quoted context omitted.
Sure, but you shouldn't undermine the mission of successfully recording words that can't be identified. It's a pretty noble goal, actually.
I, for one, refuse to be used as the source of free labor by Google just because I want to sign up for a website.
If it doesn't add extra burden to you (assuming there would just be another captcha that didn't end up feeding googles scanning effort), why do you care?