Exploring Color-Blindness


	Exploring Color-Blindness

skwirlinator

5-20-2008 8:22 AM

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color:#696969;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/a15ffc20-a1b0-45d0-8e47-374add7fe29c/2E2CDDB9-910F-49C9-8A07-7FB94CF1CDC2/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.nickyee.com/photoshop/color.html" href="http://www.nickyee.com/photoshop/color.html" style="font-size: 11px;">www.nickyee.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nickyee.com/photoshop/color.html"><P align="center"><FONT size="2" face="Verdana, Arial, Helvetica, sans-serif"><B><FONT color="#cccccc">Exploring 
  Color-Blindness</FONT></B></FONT></P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nickyee.com/photoshop/color.html"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/www.nickyee.com/img/788D49B0-4C88-4B00-BFE6-623B5F1D9B8C" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nickyee.com/photoshop/color.html"><FONT size="2" face="Verdana, Arial, Helvetica, sans-serif" color="#cccccc">Now 
      if we create an image where the red spectrum varies more than the luminosity, 
      and it is the luminosity that traces out a number, then we have an image 
      where only people who are red-green colorblind can see the hidden number. 
      This is because people with normal color-vision are thrown off by the red, 
      which the red-green colorblind people can't see. In the image below create 
      using this method, people with red-green color-blindness will see a clearly 
      defined circle.</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nickyee.com/photoshop/color.html"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.nickyee.com/img/A2273AD1-394A-4449-8D9F-959B88C90093" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nickyee.com/photoshop/color.html"><FONT size="2" face="Verdana, Arial, Helvetica, sans-serif" color="#cccccc">We 
      can even be a little more devious and create an image where people with 
      normal color-vision will see one thing and people with red-green color-blindness 
      will see another. But this is slightly more difficult and the result is 
      only moderately satisfying. Below is an image where people with red-green 
      color-blindness can see a circle and people with normal color-vision can 
      see the letter "s". However, there are probably people who have 
      mild red-green color-blindness who can see both.</FONT></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.nickyee.com/photoshop/color.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/www.nickyee.com/img/C159780A-E91C-4926-B739-2134A16FA708" alt="" /></div></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/2E2CDDB9-910F-49C9-8A07-7FB94CF1CDC2/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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