<div dir="ltr">Try SetVOI(0,0,0,79,<b><span style="color: rgb(255, 0, 0);">1,146</span></b>)<br><br>Jothy<br><br><div class="gmail_quote">On Wed, Jul 14, 2010 at 3:44 PM, Chris Turner <span dir="ltr"><<a href="mailto:cturnercomplex@googlemail.com">cturnercomplex@googlemail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hi David & Bill,<br>
<br>
thanks for your patience and your help I appreciate it a lot! So this<br>
is the code with David's suggestion:<br>
<br>
import os<br>
import vtk<br>
import sys<br>
<br>
<br>
reader=vtk.vtkImageReader()<br>
reader.SetFileName("/tmp/lungROI.vtk")<br>
reader.Update()<br>
<br>
lut=vtk.vtkLookupTable()<br>
lut.SetRange(-1024, +4095)<br>
<br>
map=vtk.vtkImageMapToColors()<br>
map.SetInput(reader.GetOutput())<br>
map.SetLookupTable(lut)<br>
<br>
<br>
voi=vtk.vtkExtractVOI()<br>
voi.SetInput(map.GetOutput())<br>
voi.SetVOI(0,0,0,79,146,1)<br>
voi.Update()<br>
<br>
writerp=vtk.vtkPNGWriter()<br>
writerp.SetInput(voi.GetOutput())<br>
writerp.SetFileName("/tmp/out.png")<br>
writerp.Write()<br>
<br>
print "done"<br>
<br>
<br>
.... but still no output nor an error message. You can take a look at<br>
the Image here:<br>
<br>
<a href="http://www.load.to/t8MWurwasf/lungROI.vtk" target="_blank">http://www.load.to/t8MWurwasf/lungROI.vtk</a> (~10mb)<br>
<br>
Thanks Again,<br>
Chris<br>
<br>
<br>
On Tue, Jul 13, 2010 at 4:38 PM, David Gobbi <<a href="mailto:david.gobbi@gmail.com">david.gobbi@gmail.com</a>> wrote:<br>
> Hi Chris,<br>
><br>
> This could be an instance of trying to write 16-bit data to a JPEG<br>
> file. Try adding vtkImageMapToColors with a suitable vtkLookupTable.<br>
> The Range of the lookup table will have to be set to something<br>
> reasonable for the image, a range of (-1024, +4095) is a good place to<br>
> start and then you can increase or decrease the range in order to get<br>
> the contrast right.<br>
><br>
> David<br>
><br>
><br>
> On Tue, Jul 13, 2010 at 2:15 PM, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>> wrote:<br>
>> Post you entire example. And, if you can post a link to your data...<br>
>><br>
>> On Tue, Jul 13, 2010 at 3:57 PM, Chris Turner<br>
>> <<a href="mailto:cturnercomplex@googlemail.com">cturnercomplex@googlemail.com</a>> wrote:<br>
>>> Hi Bill,<br>
>>><br>
>>> thanks for your answer! But didn't do the trick.<br>
>>> So strange I thought this was a standard question and procedure. And<br>
>>> that there has to be a easy way to do that.<br>
>>><br>
>>> And why don't I even get a error message or something. Even when I<br>
>>> turn on the debug mode there is nothing suspicious.<br>
>>><br>
>>> Anybody has another approach?<br>
>>><br>
>>> Thanks<br>
>>> Chris<br>
>>><br>
>>> On Mon, Jul 12, 2010 at 10:16 AM, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>> wrote:<br>
>>>> Try,<br>
>>>> voi.SetVOI(0,0,0,511,511,0)<br>
>>>><br>
>>>> On Mon, Jul 12, 2010 at 10:07 AM, Chris Turner<br>
>>>> <<a href="mailto:cturnercomplex@googlemail.com">cturnercomplex@googlemail.com</a>> wrote:<br>
>>>>> Really? Am I the only one with that problem?<br>
>>>>><br>
>>>>> On Fri, Jul 9, 2010 at 5:02 PM, Chris Turner<br>
>>>>> <<a href="mailto:cturnercomplex@googlemail.com">cturnercomplex@googlemail.com</a>> wrote:<br>
>>>>>> Hi Everyone!<br>
>>>>>><br>
>>>>>> I'm trying to extract a slice from a vtkImageData object and save it as picture.<br>
>>>>>><br>
>>>>>> That's how I do it:<br>
>>>>>><br>
>>>>>> voi=vtkExtractVOI()<br>
>>>>>> voi.SetInput(imageData)<br>
>>>>>> voi.SetVOI(0,0,0,512,512,1)<br>
>>>>>> voi.Update()<br>
>>>>>><br>
>>>>>> writer=vtkJPEGWriter()<br>
>>>>>> writer.SetInput(voi.GetOutput())<br>
>>>>>> writer.SetFileName("slice.jpg")<br>
>>>>>> writer.Write()<br>
>>>>>><br>
>>>>>> ImageData is 512x512x40 spacing 1,1,1<br>
>>>>>><br>
>>>>>> The strange thing is I don't get an output nor an error message. So I<br>
>>>>>> think I'm missing something here.... but it can't figure out what.<br>
>>>>>><br>
>>>>>> So does anybody have an idea or a better solution?<br>
>>>>>><br>
>>>>>> Thanks<br>
>>>>>> Chris<br>
>>>>>><br>
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</blockquote></div><br></div>