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	<id>http://www.avisynth.nl/index.php?action=history&amp;feed=atom&amp;title=MaskTools%2FCombMask</id>
	<title>MaskTools/CombMask - Revision history</title>
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	<updated>2026-08-24T22:08:54Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>http://www.avisynth.nl/index.php?title=MaskTools/CombMask&amp;diff=159&amp;oldid=prev</id>
		<title>Admin: 1 revision</title>
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		<updated>2013-05-09T15:01:59Z</updated>

		<summary type="html">&lt;p&gt;1 revision&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{FilterCat|External_filters|Other_filters|Support_filters}}&lt;br /&gt;
&lt;br /&gt;
{{FuncDef|CombMask (clip[, int &amp;quot;thY1&amp;quot;[, int &amp;quot;thY2&amp;quot;]])}}&lt;br /&gt;
&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;Plugin&amp;#039;&amp;#039;&amp;#039;: [[MaskTools]]&lt;br /&gt;
&lt;br /&gt;
This filter produces a mask showing areas that are combed. The thresholds work as for the other filters: after calculating the combing value, if this one is under &amp;lt;tt&amp;gt;thY1&amp;lt;/tt&amp;gt;, the pixel is set to 0, over &amp;lt;tt&amp;gt;thY2&amp;lt;/tt&amp;gt;, it is set to 255, and in between, it is set to the combing value divided by 256. &lt;br /&gt;
&lt;br /&gt;
The combing value is (upper_pixel - pixel)*(lower_pixel - pixel). Thus, it is not normalized to the range 0..255, because if it was done, value would be close to 1 or 2, no more. That means you can use threshold higher than 255, even if they should not be useful. &lt;br /&gt;
&lt;br /&gt;
Defaults are &amp;lt;tt&amp;gt;thY1&amp;lt;/tt&amp;gt; = 10 and &amp;lt;tt&amp;gt;thY2&amp;lt;/tt&amp;gt; = 10 (thus making a binary mask). &lt;br /&gt;
----&lt;br /&gt;
Back to [[MaskTools]].&lt;/div&gt;</summary>
		<author><name>Admin</name></author>
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