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Choosing a method

book posted by Agent Pugsly Fri, 2008-05-23 06:38

There are many pros and cons to both FTIR and DI systems.  In all truth both methods can create more or less equally responsive and effective screens, but there are certainly differences in time investment required, costs, space, and more.  Lets go over our

FTIR vs DI COMPARISON CHART OF SCIENCE

 FTIR

*blobs are nice and clear
* setup needs an led frame which you have to make yourself (soldering needed)
* only allows tracking with fingers, no object tracking

* requires a compliant surface, so that touches also get recognized during dragging operations

DI

* no need for a compliant surface, just an diffuser/projection surface on top
* no need for an acrylic, could use other transparent materials like glass as well
* no frame, allows for some nice box setups..
* no soldering, because you can buy the IR-Illuminators ready to go
* simple setup, difficult to get it working right
* fingers and fiducial marker tracking possible
* blobs are not as clear and sharp, when compared to ftir

 

When talking about object tracking we are talking about tracking the 'blobs' of something like a drink coaster, a cell phone, or a business card, as it moves across the surface.  

 

 

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