[PD] OCR with Puredata?

Alvin O'Sullivan alvin.oslvn at gmail.com
Wed Jun 1 18:11:09 CEST 2011

Super, I will check out the link and sorry for the double post.

It is in the early concept stages, but I was thinking that the user
interface would be a piece of glass/plastic the input device would be a
webcam on the inside of a box/resonator. The ambient light outside of the
box (no pun intended) would be enough of a difference to read the opaque
markings as parse-able characters. The user would draw on an opaque surface
and puredata would be able to make something/interpret this input and
respond in some way. It may be that I  have to simplify this to gestures
which I think puredata is also capable of doing. Reading a webcam capture of
the entire active area and the comparing that to a prior state.

Colour would open up other modes, but at this stage binary is what I am
looking for, just black and white.

I would be happy with the simplest method and the easiest to compute.

Thanks Again.

On 1 June 2011 17:49, Mathieu Bouchard <matju at artengine.ca> wrote:

> On Wed, 1 Jun 2011, Jack wrote:
>  You can do this with the use of artificial neural network (for character
>> recognition). There are externals for Pd :
>> http://pure-data.svn.sourceforge.net/viewvc/pure-data/trunk/externals/ann/
> Is it just me, or it sounds like it's going to take a lot of preprocessing
> before you can even think of feeding it to a neural network ?
> Human vision is made of a lot more layers of neurons than we can hope to
> deal with in artificial networks.
> At what angles should characters be recognised ?
> Which colour on which colour ?
> You better settle those things first, so that you can figure out how you
> can reduce your data beforehand.
> But making an OCR using ANN is a lot lot more work than using an OCR
> library. Making a Pd-to-OCR-library interface is less work than making an
> OCR abstraction library... and it isn't necessarily because Pd would be bad
> at it (I don't know about that). It's more because it takes a lot of
> knowledge to make an OCR library from nearly scratch.
>  _______________________________________________________________________
> | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal, QC
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