Hi,<br><br>if the purpose is a displayed color invertion, why not changing the lookup<br>table in the visualization pipeline? It will avoid the use of a processing<br>class that increases the memory usage.<br><br>Jerome<br>
<br><br><div class="gmail_quote">2010/3/6 circass <span dir="ltr"><<a href="mailto:circass@gmail.com">circass@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
Hi Corry, Thanx for your help.<br>
<br>
inverter->SetShift(-range[1]);<br>
double result = range[1]-range[0];<br>
inverter->SetScale(VTK_UNSIGNED_SHORT_MAX/result);<br>
<br>
this calculation made something reasonable but not good enough. the range<br>
part solved the exception as i thought.<br>
<br>
i decide to set the ColorWindow value to -1 * presentWindow.<br>
I m using imageViewer2.<br>
<br>
but still i dont know best quality color invertion algorithm.<br>
<br>
Thanx<br>
Circass<br>
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