<P>hi,all</P>
<P>I&nbsp;got&nbsp;a&nbsp;problem&nbsp;when&nbsp;I&nbsp;try&nbsp;to&nbsp;use&nbsp;itk::AntiAliasBinaryImageFilter&nbsp;to&nbsp;process&nbsp;the&nbsp;3D&nbsp;image&nbsp;and&nbsp;VtkMarchingCubes&nbsp;to&nbsp;visualise&nbsp;it,&nbsp;</P>
<P>but&nbsp;the&nbsp;output&nbsp;of&nbsp;filter&nbsp;is&nbsp;nothing.I&nbsp;have&nbsp;no&nbsp;idea&nbsp;why&nbsp;the&nbsp;size&nbsp;of&nbsp;output&nbsp;is&nbsp;0,here&nbsp;is&nbsp;part&nbsp;of&nbsp;my&nbsp;code:<BR></P>
<P>typedef&nbsp;float&nbsp;IoPixelType;&amp;nbsp;&amp;nbsp;typedef&nbsp;itk::Image&lt;&nbsp;IoPixelType,&nbsp;3&nbsp;&gt;&nbsp;IoImageType_3D;</P>
<P>typedef&nbsp;itk::AntiAliasBinaryImageFilter&lt;IoImageType_3D,IoImageType_3D&gt;&nbsp;AntiAliasFilterType;</P>
<P>AntiAliasFilterType::Pointer&nbsp;antialias&nbsp;=&nbsp;AntiAliasFilterType::New();</P>
<P>antialias-&gt;SetInput(inputimage);</P>
<P>antialias-&gt;SetMaximumRMSError(0.01);</P>
<P>antialias-&gt;SetNumberOfIterations(50);</P>
<P>antialias-&gt;SetNumberOfLayers(&nbsp;2&nbsp;);</P>
<P>DistanceField_s&nbsp;=&nbsp;antialias-&gt;GetOutput();<BR></P>
<P>any&nbsp;advice&nbsp;will&nbsp;be&nbsp;appreciated.</P>
<P><BR>XuXing</P>