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<DIV><FONT face=Arial size=2>Hi,</FONT></DIV>
<DIV><FONT face=Arial size=2>I have a suggestion. After reader.Update() call,
try reader.GetOutput().Update(). This is supposed to update bounds, extents, et
cetera.</FONT></DIV>
<DIV><FONT face=Arial size=2>HTH</FONT></DIV>
<DIV><FONT face=Arial size=2>Vidyadhar</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=evans@aps.anl.gov href="mailto:evans@aps.anl.gov">Kenneth Evans</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=vtkusers@vtk.org
href="mailto:vtkusers@vtk.org">vtkusers@vtk.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, May 21, 2008 1:48
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [vtkusers] How to make
vtkImagefrom vtkTIFFReader resize</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt">I am
reading and rereading TIFF images of different sizes (this is in Python, but
it should not matter):<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
reader = vtk.vtkTIFFReader()</SPAN></FONT><FONT face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
reader.SetFileName(filename)</SPAN></FONT><FONT face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
reader.Update()</SPAN></FONT><FONT face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
actor = vtk.vtkImageActor()</SPAN></FONT><FONT face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
actor.SetInput(reader.GetOutput())</SPAN></FONT><FONT face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
actor.SetVisibility(</SPAN></FONT><FONT face="Courier New" color=maroon><SPAN
style="COLOR: maroon; FONT-FAMILY: 'Courier New'">1</SPAN></FONT><FONT
face="Courier New" color=black><SPAN
style="COLOR: black; FONT-FAMILY: 'Courier New'">)</SPAN></FONT><FONT
face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
ren.AddActor(actor)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt">I
want to read a new image:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
reader.SetFileName(filename)</SPAN></FONT><FONT face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">
reader.Update()<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN style="FONT-SIZE: 10pt">This
works fine, except the output = reader.GetOutput() which is a vtkImage retains
the old size.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: 'Courier New'">output.GetExtent()
returns the original extent.</SPAN></FONT><FONT face="Courier New"><SPAN
style="FONT-FAMILY: 'Courier New'"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">output.GetWholeExtent()
returns the new extent<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt">but<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">output.SetExtent(output.GetWholeExtent())
crashes.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">How to I reset the
vtkImage extent (without creating a new actor)?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">Thanks,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=black size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: black">
-Ken</SPAN></FONT><o:p></o:p></P>
<P class=MsoNormal><FONT face=Arial size=2><o:p> </o:p></FONT></P></DIV>
<P>
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