headtracker / mag lens / macro lens (linaccess at yokoy.de)

[linaccess at yokoy.de]

Hi,

On Thu, 06 Sep 2007 14:55:31 -0400
"Benjamin M. Schwartz" <bmschwar at fas.harvard.edu> wrote:

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> Have you ever used a IBM/Lenovo Thinkpad laptop with the red joystick-mouse in
> the middle of the keyboard?  These use the position of the joystick to control
> the velocity of the cursor.  I am using one right now, and I find it quite
> effective.  The joystick only is able to record a few positions, but because it
> is used to set velocity, the effect is very high precision.
> 
> This might allow very small motions to be used, improving comfort.
> 

yes, I am sitting at an ibm x20 right now and I like that build in stick from IBM much more than touchpads. On the other hand I used such a stick on a toshiba, too. It was horrible...

> - --Ben
> 
> 
> P.S. I have now realized that phase correlation is probably unnecessary for you,
> because your image already contains a single bright spot.  Phase correlation
> would be appropriate if you wish to attempt this without the reflector, based on
> the face itself.

OK. I still want to realize as much as possible hardware based (well, depends on price). The XO is a slow machine so some time ago I concluded to wipe out unneeded information using IR LEDs and IR Filter. With that the activities should stay usable without slowed down a lot. The board, IR LEDS, reflectiv foil, IR Filter and the resistor costs less than 1,5 Euro. Buying them as an end customer. Put those parts onto the XO board by default would cost only a few cents.

Maybe the next generation of XO have intergrated them? A small slot in front of the webcam lense could pick up various filters and lenses. Also suitable for microscope projects.

yokoy