<doc>
	<legacy_id>426</legacy_id>
	<term>alpha channel</term>
	<definition><p>A set of values, or <glossary tag="channel">channel</glossary>, that encodes transparency information for an <keyword tag="image">image</keyword>.</p>
<p></p>
<p>Each <glossary tag="pixel">pixel</glossary> in the <keyword tag="image">image</keyword> has a number that specifies how transparent it is. An <glossary tag="image">image's</glossary> alpha channel consists of the transparency numbers for all the <property tag="pixels">pixels</property> in the <keyword tag="image">image</keyword>.</p></definition>
	<categories>
	 	<category>Appearance &amp; Positioning</category>
	</categories>
	<synonyms>
	 	<synonym>alpha channel</synonym>
	 	<synonym>alpha channels</synonym>
	 	<synonym>alpha channel's</synonym>
	 	<synonym>alpha channels'</synonym>
	 	<synonym>transparency channel</synonym>
	 	<synonym>transparency channels</synonym>
	 	<synonym>transparency channel's</synonym>
	 	<synonym>transparency channels'</synonym>
	</synonyms>
</doc>