Hi folks,
During registering an account for another person in Wikipedia I was able to find the msysterious "Wrong-Captcha"-Bug.
I registered http://de.wikipedia.org/wiki/Benutzer:ChatSocke, see (also timestamp): http://de.wikipedia.org/w/index.php?title=Spezial%3ALogbuch&type=newuser...
At my first attempt the right graphical captcha was "veryours" but it clearly did read as "veryaurs" (which I typed wrongly in and so got the error, although I knew that this was strange English). The little "o" definitely was displayed as a little "a" (the right side was strechted to a sharp vertical line, like in a real "a").
So it is no surprise that en.wikipedians do make less failures on english captchas with undefineable letters.
I hope you can track and maybe solve the problem now (people bug our Wikmedia-OTRS quite often with captcha problems).
Cheers, Arnomane
Daniel Arnold wrote:
So it is no surprise that en.wikipedians do make less failures on english captchas with undefineable letters.
I hope you can track and maybe solve the problem now (people bug our Wikmedia-OTRS quite often with captcha problems).
In other capthca related news reCAPTCHA (http://recaptcha.net/) is now available for Mediawiki. Might be an option for some people.
Andy Armstrong wrote:
In other capthca related news reCAPTCHA (http://recaptcha.net/) is now available for Mediawiki. Might be an option for some people.
So if the captcha asks for 'red riding', and the vandal answers 'red penis' the Perrault's character is renamed on some book page being digitized?
On 7/16/07, Platonides Platonides@gmail.com wrote:
Andy Armstrong wrote:
In other capthca related news reCAPTCHA (http://recaptcha.net/) is now available for Mediawiki. Might be an option for some people.
So if the captcha asks for 'red riding', and the vandal answers 'red penis' the Perrault's character is renamed on some book page being digitized?
Always look on the bright side of life . . . dum dum, dum dum, dum dum dum dum dum dum . . .
Platonides wrote:
So if the captcha asks for 'red riding', and the vandal answers 'red penis' the Perrault's character is renamed on some book page being digitized?
I wondered that :)
I think they present the same word more than once and have a voting algorithm to decide what it really is. They don't reveal exactly how that works - presumably because they need to keep the details secret so they don't help people who want to game it.
On Tue, 2007-07-17 at 00:21 +0200, Platonides wrote:
So if the captcha asks for 'red riding', and the vandal answers 'red penis' the Perrault's character is renamed on some book page being digitized?
The site specifically describes how they have a "peer-review" style process to weed this out.
On 16/07/07, Daniel Arnold arnomane@gmx.de wrote:
At my first attempt the right graphical captcha was "veryours" but it clearly did read as "veryaurs" (which I typed wrongly in and so got the error, although I knew that this was strange English). The little "o" definitely was displayed as a little "a" (the right side was strechted to a sharp vertical line, like in a real "a").
No doubt this is a side-effect of the graphical manipulation used to skew words to help make the CAPTCHAs themselves more robust.
So it is no surprise that en.wikipedians do make less failures on english captchas with undefineable letters.
Could be worse, at least those users aren't blind or reliant upon a device to help them read the page; such people have no hope whatsoever of passing a CAPTCHA.
I hope you can track and maybe solve the problem now (people bug our Wikmedia-OTRS quite often with captcha problems).
Not sure what the best solutions might be. I suppose if we had another CAPTCHA generator script, we could start generate different-looking images, which might help the situation.
It might be possible to blacklist certain combinations of letters in the words selected for CAPTCHAs, but this might not be feasible.
Rob Church
On 7/16/07, Rob Church robchur@gmail.com wrote:
It might be possible to blacklist certain combinations of letters in the words selected for CAPTCHAs, but this might not be feasible.
It's already been done for a few weeks. Brion added it to the image generator after someone got a rather impolite-looking captcha.
On 16/07/07, Simetrical Simetrical+wikilist@gmail.com wrote:
It's already been done for a few weeks. Brion added it to the image generator after someone got a rather impolite-looking captcha.
Yes, I'm aware that it's possible to use the blacklist. However, I was referring to whether or not it's feasible to blacklist all the problematic combinations of *letters*, i.e. whether or not this would cause a significant reduction in the number of available CAPTCHAs.
Rob Church
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Rob Church wrote:
On 16/07/07, Simetrical Simetrical+wikilist@gmail.com wrote:
It's already been done for a few weeks. Brion added it to the image generator after someone got a rather impolite-looking captcha.
Yes, I'm aware that it's possible to use the blacklist. However, I was referring to whether or not it's feasible to blacklist all the problematic combinations of *letters*, i.e. whether or not this would cause a significant reduction in the number of available CAPTCHAs.
Er, is "o" a problematic combination of letters?
- -- brion vibber (brion @ wikimedia.org)
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