In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Coriolis wrote:

[quote="pjv"]
Hello John;

A couple of points...

 The eye is a non-linear sensor (probably logarithmic?), but so is an LED's light output with current. Hence there appears to some proportionalism of peceived brightness versus duty cycle.
[/quote]You are correct Peter, pretty much all biological sensory systems are logarithmic in thier response, its so that minute signals can be detected without being damaged in the presence of "naturally occuring" large signals. My graduate group did extensive work on modelling this response and exploiting it for various reasons. Basically applying the theory behind mp3 to all sorts of areas, such as encoding information into video and audio while remaining undetectable, because the "sideband" information is biologically masked by the much stronger main signal.

---------- End of Message ----------


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=115364#m116262

Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)