diff --git a/functions/image.xml b/functions/image.xml
index 15ad237545..f7207e38ef 100644
--- a/functions/image.xml
+++ b/functions/image.xml
@@ -79,10 +79,16 @@
      </programlisting>
     </example>
    </para>
+   <para>
+    With <acronym>JPEG</acronym> images, two extras index are returned : 
+    <literal>channel</literal> and <literal>bits</literal>. 
+    <literal>channel</literal> will be 3 for RGB pictures, and 4 for CMYK 
+    pictures. <literal>bits</literal> is the number of bits for each color.
+   </para>
    <para>
     The optional <parameter>imageinfo</parameter> parameter allows
     you to extract some extended information from the image
-    file. Currently this will return the diffrent
+    file. Currently this will return the different
     <acronym>JPG</acronym> APP markers in an associative Array. Some
     Programs use these APP markers to embedd text information in
     images. A very common one in to embed <acronym>IPTC</acronym>