2009 May 29, 9:17
"Anyway, the idea is to find techniques, be they arrays of bright infrared LEDs, or paints that shine well in infrared but are not obvious in visible light, and create invisible graffiti that only
shows up in tourist photos and videos."
2009 May 29, 9:13
"Developed in the late 1960s by Dutch physicist J. R. J. van Asperen De Boer, infrared reflectography (IRR) is a technique used to look through the paint layers. ... Many paints will appear partially
or completely transparent while others, such as black, will absorb the infrared radiation and appear dark."
2009 May 29, 9:01
"These inks are completely invisible to the human eye yet can be seen by using a device which can see in the infrared range - such as our modified cameras and camcorders. These inks do not fluoresce
in the visible range, cannot be seen with ultraviolet lights and cannot be seen by the human eye alone." Via and not via .
2009 May 29, 8:59
Don't need to cover _flash bulbs_ with infrared paint, but the paint is to block out all but infrared light so could be useful otherwise. Via
2009 May 29, 8:49
Howto on goggles that block out everything but the small range of IR that's barely visible. "INFRARED GOGGLES FOR UNDER $10, A Human IR Vision Experiment, Sept. 14, 2002 Bill Beaty"
2009 May 29, 2:50
I like the idea of QR codes, encoding URLs and placing them
on real world objects, but the QR codes themselves are kind of ugly. To make them less obvious I thought I could spray QR codes on to an object with an infrared reflective paint and shine infrared
light on the QR codes, since most cameras, for instance the camera in my G1 phone, pick up infrared that our eyes do not.
In my search for infrared paint I've found a seller of IR ink (via programming forum) and an Infrared Paint Recipe (via IR FAQ).
In looking for this paint I've found that it comes up a lot in relation to the military for things like paint markers that are visible at
night with proper equipment, and paint that absorbs IR light to make vehicles less obvious to night vision goggles. Even though the first
reflects infrared light and the second absorbs it websites end up refering to both as infrared paint which made it difficult to search.
Additionally I found links to some other geeky infrared projects:
2007 Jun 7, 5:29
The other day I had the best idea for my Wii remote. Clearly I should use it to control the rotation of Tetris pieces in my N-dimensional
Tetris game Polytope Tetris
. One of the issues I described with Polytope Tetris
is user input. Given a Wii remote the
user could rotate a piece through 3 dimensions in a manner that's much easier to adjust to than particular keys on the keyboard.
Anyway, I did a little research
into how this might work. I knew that the Wii remote used infrared for absolute positioning and
Bluetooth for everything else (LEDs, speaker, accels.) I bought a Bluetooth adapter
for my PC after realizing that none of my
computers had one already. I used GlovePIE
to ensure that my Wii remote could connect and successfully communicate with my computer.
GlovePIE is actually pretty cool -- it provides a simple script layer over the Wii remote to control things like your mouse.
Since Polytope Tetris is in Java I looked for and found a Java library for operating with the Wii remote
and a long forum thread discussing its use
. I then read up on Bluetooth in Java
. Apparently JSR 82 is the name of the standard that describes the API a Bluetooth stack should expose
in Java. That is, to get Bluetooth working in Java one needs an additional package for Java that actually implements the Bluetooth Java API. This package would depend on the system so I suppose I
can't fault Sun for not including it... Where to find such a package? I found a comparison list of implementations
and tried the ones
that support javax.bluetooth. None of them
worked for me because none can address USB devices it seems or they cost money and I couldn't get the trial version working. I also tried
(not listed on the previous list) which seemed promising and could produce an address for my Wii remote as a connected device but couldn't use
And I thought that after I found the Wii remote Java library it would be easy... Oh well...