<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"><base href="x-msg://893/"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Bob<div><br></div><div>Back in the day when I was working on marine navigation chart displays</div><div>we used separate color tables for different light conditions</div><div><br></div><div>we found that 3 tables sufficed, Day, Dusk/Dawn, Night</div><div><br></div><div>we cheated a bit and used 64 bit palettes this way with a little trickery</div><div>we could pack everything into a normal 8 bit color table</div><div><br></div><div>In practice this worked quite well</div><div><br></div><div>HTH</div><div><br></div><div>Norman</div><div><br><div><div>On Mar 3, 2014, at 11:30 AM, "Basques, Bob (CI-StPaul)" <<a href="mailto:bob.basques@ci.stpaul.mn.us">bob.basques@ci.stpaul.mn.us</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div lang="EN-US" link="blue" vlink="purple" style="font-family: Arial; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div class="WordSection1" style="page: WordSection1; "><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; ">All,<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; ">So, I’ve been reading up on nighttime colors for electronic display(s). I was wondering if anyone has any pointers on information about applying color temperature corrections to displays for nighttime viewing. I’m in need of providing this functionality to some night crew workers.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; ">My first thought was to apply some sort of RGB algorithm to the mapfile color settings. Then I thought maybe a middleware processor routine (between MapServer and the browser) might be a better approach, or possibly using something in the browser . . .<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; ">I’m only looking at setting up distinct color settings at the moment. Maybe 3-5 ranges to start with. I do know that some Mac hardware has some display monitoring for color temperature. I would prefer to do something that could apply globally however.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; ">Maybe there are Browser functions that can be applied to the problem (I haven’t found anything specific there yet though.<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; ">Thanks<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; ">Bobb<o:p></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div><div style="margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 8pt; font-family: 'Comic Sans MS', serif; "> </span></div></div>_______________________________________________<br>mapserver-users mailing list<br><a href="mailto:mapserver-users@lists.osgeo.org" style="color: purple; text-decoration: underline; ">mapserver-users@lists.osgeo.org</a><br><a href="http://lists.osgeo.org/mailman/listinfo/mapserver-users" style="color: purple; text-decoration: underline; ">http://lists.osgeo.org/mailman/listinfo/mapserver-users</a></div></blockquote></div><br></div></body></html>