commit 135389675f879efbd1510e6df96ab5ed6d361f55
author cristy <urban-warrior@git.imagemagick.org> Fri Feb 26 17:53:04 2010 +0000
committer cristy <urban-warrior@git.imagemagick.org> Fri Feb 26 17:53:04 2010 +0000
tree 07abbd1e46fa353c125b47621b95d35de958814a
parent 574bdbc8cc2ce5b2bf2a5a00d30091b2a0a81ad0

www/command-line-options.html

diff --git a/www/command-line-options.html b/www/command-line-options.html
index db9104c..17c1a2d 100644
--- a/www/command-line-options.html
+++ b/www/command-line-options.html
@@ -4827,6 +4827,9 @@
 
 <p>If the <a href="#filter">-filter</a> option precedes the <a href="#resize">-resize</a> option, the image is resized with the specified filter.</p>
 
+<p>Many image processing algorithms assume your image is in a linear-light coding.  If your image is gamma-corrected, you can remove the nonlinear gamma correction, apply the transform, then restore it like this:</p>
+
+<p class='crt'><span class="crtprompt"> $magick&gt; </span><span class='crtin'>convert portrait.jpg -gamma .45455 -resize 25% -gamma 2.2 -quality 92 passport.jpg</span></p>
 <div style="margin: auto;">
   <h4><a name="respect-parentheses" id="respect-parentheses"></a>-respect-parentheses</h4>
 </div>