http://avisynth.nl/index.php?action=history&feed=atom&title=MaskTools%2FYV12Substract 2026-04-08T01:16:49Z Revision history for this page on the wiki MediaWiki 1.19.24 http://avisynth.nl/index.php?title=MaskTools/YV12Substract&diff=183&oldid=prev 2013-05-09T15:02:00Z

<p>1 revision</p> <table class='diff diff-contentalign-left'> <tr valign='top'> <td colspan='1' style="background-color: white; color:black;">← Older revision</td> <td colspan='1' style="background-color: white; color:black;">Revision as of 15:02, 9 May 2013</td> </tr></table>

Admin http://avisynth.nl/index.php?title=MaskTools/YV12Substract&diff=182&oldid=prev 2008-02-28T22:35:48Z

<p>New page: {{FilterCat|External_filters|Other_filters|Support_filters}} {{FuncDef|YV12Subtract (clip1, clip2, int tol [, bool &quot;widerange&quot;])}} &#039;&#039;&#039;Plugin&#039;&#039;&#039;: <a href="/index.php/MaskTools" title="MaskTools">MaskTools</a> This filter computes the d...</p> <p><b>New page</b></p><div>{{FilterCat|External_filters|Other_filters|Support_filters}}<br /> <br /> {{FuncDef|YV12Subtract (clip1, clip2, int tol [, bool &quot;widerange&quot;])}}<br /> <br /> '''Plugin''': [[MaskTools]]<br /> <br /> This filter computes the difference between the two clips. There are several ways of computing this difference, depending on the values of &lt;tt&gt;widerange&lt;/tt&gt; and of &lt;tt&gt;tol&lt;/tt&gt;.<br /> <br /> * &lt;tt&gt;widerange&lt;/tt&gt; = true : We compute the difference (n) between the two clips, and we return <br /> r = 128 + 128 * pow(n/255, 1/&lt;tt&gt;tol&lt;/tt&gt;). <br /> : If &lt;tt&gt;tol&lt;/tt&gt; &lt; 0, instead of 1/&lt;tt&gt;tol&lt;/tt&gt; we put 0.5 in the formula above.<br /> * widerange = false (and)<br /> :* &lt;tt&gt;tol&lt;/tt&gt; &lt; 0 : we compute the absolute difference (n) between the two clips, and we return <br /> r = n / 2 + 128.<br /> :* &lt;tt&gt;tol&lt;/tt&gt; &gt;= 0 : we compute the absolute difference (n) between the two clips, and we return 0 if n is lower than &lt;tt&gt;tol&lt;/tt&gt;, n - &lt;tt&gt;tol&lt;/tt&gt; else. <br /> <br /> Defaults are: &lt;tt&gt;tol&lt;/tt&gt; = -1 and &lt;tt&gt;widerange&lt;/tt&gt; = false. <br /> <br /> ----<br /> Back to [[MaskTools]].</div>

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