Re: OCR Software..?!

Alex Belits (abelits@phobos.illtel.denver.co.us)
Wed, 12 Nov 1997 19:39:24 -0800 (PST)

On Thu, 13 Nov 1997, Colin 't Hart wrote:

> An ideal OCR would use the "lower level" results from the letter
> recognition to influenece the "high level" word recognition and
> vice versa.
>
> I'm not familiar with this Neural Net speak, but I think this
> sort of thing is possible and should help to achieve much higher
> accuracy levels.

Good news: You are describing one of the uses for backward error
propagation in neural nets.

Bad [news?]: I am not aware of any serious study of this method's
consistent application in the system with large number of levels involved
(here it's shapes -> letters -> words [-> sentences]). OCR systems mostly
use "simple hacks", and probably neural-net-like things inside one level.

--
Alex

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