<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<META content="MSHTML 6.00.6000.16587" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV>Dear all:</DIV>
<DIV>I got a mri data in short type ranging from 0-20000+.</DIV>
<DIV>I use vtkOpenGLImageActor to display 2d images,but as this class only
support unsigned char scalars.If I shift and scale my data, much information
would be lost and the images got blurred. Meanwhile the tranfer function of
ray-casting is hard to control.In my program, a initial rendering
result is achieved through mapping the minimun to opacity 0 and the
maximum to opactiy 1.0. As the data has a wide scope,the contrast is rather
low.</DIV>
<DIV> </DIV>
<DIV>Anyone know the solutions? Thanks!</DIV></BODY></HTML>