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<div class="moz-cite-prefix">Hi<br>
<br>
I do not know how scilab does it, but i've been tought (in a
general context) to use the luminance when doing this. More info
here: <a class="moz-txt-link-freetext" href="http://en.wikipedia.org/wiki/Luminance_%28relative%29">http://en.wikipedia.org/wiki/Luminance_%28relative%29</a><br>
<br>
According to this method, one should compute<br>
Y = 0.2126 R + 0.7152 G + 0.0722 B<br>
<br>
and then use the color (Y,Y,Y) as a gray tone (in the RGB space).<br>
I did not check wether Scilab actually does this.<br>
<br>
PS: the NASA has a great page on color usage, contrast, and more:
<a class="moz-txt-link-freetext" href="http://colorusage.arc.nasa.gov/guidelines.php">http://colorusage.arc.nasa.gov/guidelines.php</a><br>
<br>
Best Regards<br>
AVS<br>
<br>
01/08/2012 12:31, Damo wrote:<br>
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<blockquote cite="mid:1343817093413-4024652.post@n3.nabble.com"
type="cite">
<pre wrap="">I am curious as to what is the formula used to convert RGB images to
grayscale, using the command RGB2Gray.
Any information will be helpful.
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