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Exploring color blindness-fasinating!
grammydjb1
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6-10-2008 10:43 PM
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science;eyesight
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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: #ffffff;"><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/8a78ec79-8539-4d94-ba0b-db9f1233bbbb/F9323C76-BCF3-4889-AB0B-1F650EB43991/" 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"><FONT color="#cccccc">Exploring Color-Blindness</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"><FONT size="2" face="Verdana, Arial, Helvetica, sans-serif" color="#cccccc">Using the Pointillize filter on numbers traced out by shifts in one color, we can create images such as the one below where people with normal vision can see the numbers "52", and where people who have red-green color-blindness can only see the "5".</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/AC62069F-B407-45E7-8D21-CDDEF21B04CB" 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://content8.clipmarks.com/blog_cache/www.nickyee.com/img/9B4933DB-58ED-47B8-949D-7D543ED4BDE0" 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;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/F9323C76-BCF3-4889-AB0B-1F650EB43991/blog/" title="blog or email this clip"><img src="http://content9.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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