[Accessibility] HaptoRender as Master's Degree

[Lulu-Ann at gmx.de]

Hello list members,
hello Peter!
> I think, that general purpose rendering rules are not possible for 
> tactile maps. Such things are impossible for graphical maps - different 
> special maps would collide due to restrictions in the overall count of 
> distinguishable patterns.
> 
> The number of patterns a user can distinguish and, more important, 
> identify, is significantly smaller in haptics, I'm pretty sure (although 
> it's only an unprooved claim here).
> Therefore it's more or less useless to discuss about "the rendering
> rules".

I disagree. Of course the number of rendered objects is much smaller,
but still we need a common undestanding which object is represented with which icon or texture.
That is what we call "rendering".
As Thomas is already working on a tactile stylesheet, these icons and textures need to be negotiated as soon as possible, and that's what he is asking vor.

> Of course, a standard rendering style for common objects is useful, but 
> I would not concentrate too much on that for now.

Don't talk delay in somebody elses project, please.
 
> IMHO the better approach would be to define an interface how arbitrary 
> reliefs can be transferred to the haptical renderer, be it as a (well 
> defined) vector graphic or as a (e.g. grayscale) pixel matrix.

This interface is the work being already done.
One interface for each output device.

> If there are hardware restrictions like resolution, minimum size of 
> extruded areas (stability), minimum size of lower areas ("melting 
> material"), then these are the interesting parameters.

For Thomas' Makerbot the resolution is finer than fingers can detect.
We will see if small extruded areas will break, but actually we are not planning to build any in.

I don't know about the resolution of Daniel's solution.

It is important to me, that between the OSM data and the format in the middle (greyscale graphics or CAD format or 3D printer format) there must be a stylesheet.

This stylesheet shall be exchangable, so we can make maps of different skales, different amount of objects, and maps for persons with more or less tactile abilities, and maps for persons with different map reading skills (children!).

The stylesheet shall also contain information about the language and the braille writing type (Letter by letter or shortened braille).

Do we need another page Haptorender/Stylesheet for this?

Best regards
Lulu-Ann

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