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project:multitouch:start

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project:multitouch:start [2016/11/25 08:37] – ↷ Page moved and renamed from project:multitouch to project:multitouch:start ruzaproject:multitouch:start [2016/11/28 01:04] (current) – ruza
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 ====== MultiTouch ====== ====== MultiTouch ======
-{{template>infobox|+{{template>:project:infobox|
 name=MultiTouch| name=MultiTouch|
 image=multitouch.jpg| image=multitouch.jpg|
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 sw=undecided| sw=undecided|
 status=dormant}} status=dormant}}
 +
 +~~META:
 +status = dormant
 +&relation firstimage = :project:multitouch.jpg
 +~~
  
 We would like to create a large multi-user interactive surface, commonly known as "multi-touch table", and experiment with hardware enhancements, creating better software support and enjoying the general coolness. We would like to create a large multi-user interactive surface, commonly known as "multi-touch table", and experiment with hardware enhancements, creating better software support and enjoying the general coolness.
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 We need a way to make the projected image big enough to cover the surface in the not-so-big space below the surface. Maybe special lens could be used, maybe we need a system of mirrors. We need a way to make the projected image big enough to cover the surface in the not-so-big space below the surface. Maybe special lens could be used, maybe we need a system of mirrors.
  
-When fingers touch the surface, this is detected by IR light spots triggered at the surface. To register this, we will need an IR webcam. Pasky has a low-end one, the FPS is not high but can suffice for starters. Later, we can buy a [[Wii Remote|wiimote]], which has high FPS IR camera inside. To shine the IR light, we need an IR source; it is possible to buy special IR reflectors, Pasky also has few tens of IR LEDs.+When fingers touch the surface, this is detected by IR light spots triggered at the surface. To register this, we will need an IR webcam. Pasky has a low-end one, the FPS is not high but can suffice for starters. Later, we can buy a [[..:wii_remote|wiimote]], which has high FPS IR camera inside. To shine the IR light, we need an IR source; it is possible to buy special IR reflectors, Pasky also has few tens of IR LEDs.
  
 Finally, we need to implement the way the IR light spots appear when fingers touch the surface. There are three ways: Finally, we need to implement the way the IR light spots appear when fingers touch the surface. There are three ways:
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   * [[http://wiki.nuigroup.com/FTIR|Frustrated Total Internal Reflection (FTIR)]]: The IR light is shined _into_ the acrylic plate, and reflects within unless a finger touches the surface, changing refraction index and causing the light to shine out. This is most accurate and reliable method, but cannot detect hovering, placed objects and it is quite laborous to polish the edges and mount the LEDs to a frame around the board.   * [[http://wiki.nuigroup.com/FTIR|Frustrated Total Internal Reflection (FTIR)]]: The IR light is shined _into_ the acrylic plate, and reflects within unless a finger touches the surface, changing refraction index and causing the light to shine out. This is most accurate and reliable method, but cannot detect hovering, placed objects and it is quite laborous to polish the edges and mount the LEDs to a frame around the board.
  
-If this is to be useful also for the [[project:Reactable]], we _need_ diffused illumination.+If this is to be useful also for the [[project:reactable:start]], we _need_ diffused illumination.
  
 ===== Software ===== ===== Software =====
project/multitouch/start.1480063065.txt.gz · Last modified: 2016/11/25 08:37 by ruza