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views:

185

answers:

1
+1  Q: 

How can I get started recognizing character input via a touchpad?

I want to write a piece of software that could convert a touchpad into a writepad. For example, if you write 'A','B' or 'C' on the touchpad with your finger, the software should enter that character to stdin.

I don't know how to get started with this project. What would you suggest?

A: 

The biggest challenge would be to convert tracker (it doesn't have to be a touch pad, mouse would work as well) movement to drawn forms that are interpreted as letter forms. That's the non-trivial task.

If I wanted to write that bit on my own, my first instinct would be to use a neural net that is trained to recognize letter forms. (Related question.)

 2009-10-21 14:52:08
You simply need to capture relative movement of the tracker once a drawing action is started. Think through the problem using the mouse (and a mouse key press to indicate drawing action) and related mouse movement events. Using a touch pad simply removes the need for coordinating mouse movement and mouse key press, that's all.
 2009-10-21 15:09:22
@alphazero:thanks man
 2009-10-21 15:11:23

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