- From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
- Date: Thu, 18 Mar 2010 08:06:20 +1100
- To: John Foliot <jfoliot@stanford.edu>
- Cc: "Gregory J. Rosmaita" <oedipus@hicom.net>, public-html-a11y@w3.org
On Thu, Mar 18, 2010 at 7:58 AM, John Foliot <jfoliot@stanford.edu> wrote: > Silvia Pfeiffer >> >> Is there no way at all to transfer a CAPTCHA onto a braille device? >> >> Just curious. > > Hi Silvia, > > No, as it then would also be accessible to bots, etc. The whole point is > that CAPTCHAs (visual or audio) are actually testing for physical ability > rather than cognition - you can see something or hear something, actions > that machines can replicate but not accurately process - thus, the logic > goes, you are human and not machine. > > But if a disabled user requires a machine to interact with technology > (i.e. Adaptive Technology), then the very task that CAPTCHAs have been > created to do (frustrate machine processing) impacts the user *reliant* on > machine processing. (And we won't get into the whole issue of some > people's belief in OCR to save the world, or speech-to-text for > captioning, because if these technologies did actually work with 100% > accuracy, they would completely negate the 'security' around CAPTCHAs) > > There is no such thing, nor will there ever be, a totally accessible > CAPTCHA, as by definition the two are mutually exclusive. > > Cheers! > > JF > Very interesting indeed. It seems to indeed be a big accessibility challenge. Do images get transferred onto braille at all? Could it be done pixel-wise? I'm wondering if there could be a technical solution, even if it doesn't exist yet. Regards, Silvia.
Received on Wednesday, 17 March 2010 21:07:12 UTC