No, it means that the color that has to do most with what we percieve as intensity is green. -Adam Pic Dude wrote: >If I remember correctly from my web graphics phase, RGB to greyscale >(intensity) conversion is 0.3R + 0.59G + 0.11B. Doesn't this suggest >that blue has the highest intensity, so it's scaled the least? And green >has >the lowest so it's scaled the most? > >If eyes are least sensitive to red, then I wonder why its used in most >alerting situations (brake lights, stop signs, etc).... hmmm? > > > >----- Original Message ----- >From: "Dave King" >To: >Sent: Thursday, March 14, 2002 2:22 AM >Subject: Re: [BUY]: LED sources... > > >>At 11:49 PM 3/13/02 -0800, you wrote: >> >>>At 11:06 PM 3-13-2002, Pic Dude wrote: >>> >>>>>>Because your eyes are the least sensitive to red light >>>>>> >>>>>Peak response is at green (night vision viewers) and >>>>>yellow (warning signs / emergency vehicles) >>>>> >>>It makes you wonder what the world would look like if our eyes had a flat >>>response. I read somewhere that for red light to look the same amplitude, >>>it had to be same large number, like 1000, times brighter. This makes me >>>imagine how painful a sunset would be. :) >>> >>>Brandon Irwin >>> >>If you look for the CIE charts and know what the wavelength is it's very >>easy to figure out >>the effective output of a color. For example a green might be .785 while >>the red is .48 >>and a blue .28. In other words if you had a 100 candela white, the red >>would appear to output >>78% of that and so on. There are some colors that are under 1% effective. >> >>There are a couple of other standards but the CIE one has been around >> >since > >>the mid 30's >>and is generally accepted by everyone. >> >>Dave >> >>-- >>http://www.piclist.com hint: The list server can filter out subtopics >>(like ads or off topics) for you. See http://www.piclist.com/#topics >> >> >> > >-- >http://www.piclist.com hint: The list server can filter out subtopics >(like ads or off topics) for you. See http://www.piclist.com/#topics > > > > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics