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vtkWindowToImageFilter does not require you to render the image
on-screen. It only requires that you use a vtkRenderWindow, and by
using vtkImageViewer, you are using a vtkRenderWindow.<br><br>
- Amy<br><br>
At 01:44 PM 6/8/2005, Renaud Isabelle wrote:<br>
<blockquote type=cite class=cite cite="">Hi,<br>
<br>
I'm sorry but this is not what I'm looking for. I have no image on the
screen. <br>
<br>
By using <b>vtkImageActor</b> I can display one slice of my 3D image.
This will be rendered off screen.<br>
<br>
All I want is retrieve the pixel data of this slice from memory to
display it on .<br>
<br>
Do you have another idea?<br>
<br>
Thanks,<br>
Isa<br><br>
<b><i>Randall Hand <randall.hand@gmail.com></i></b> a écrit :<br>
<dl>
<dd>to get the screen image, you can use vtkWindowToImageFilter.. that'll
turn the screen display into a 2d vtkImageData object that you can pass
to other VTK filters (or in my case, vtkPNGWriter).<br><br>
<dd>
<a href="http://www.vtk.org/doc/nightly/html/classvtkWindowToImageFilter.html">
http://www.vtk.org/doc/nightly/html/classvtkWindowToImageFilter.html</a>
<br><br>
<br><br>
<dd>On 6/8/05, Renaud Isabelle</b>
<<a href="mailto:renauisa@yahoo.fr">renauisa@yahoo.fr</a>> wrote:
<br>
<dl>
<dd>I'm got really crazy</b>. I don't manage to use double buffering</b>
in order to avoid flickering</b> on screen.<br>
<dd> <br>
<dd>I'm using ImageSliceViewer</b> to render a 2D slice of my 3D image on
screen</b>. It works well without double buffering except for flickering
on screen.<br>
<dd> <br>
<dd>I have already use double buffering in MFC and I have a class CMemDC
that works fine to use memory buffering. <br>
<dd> <br>
<dd>-> All I need is a method to get the pixel data of my 2D slice
displayed on screen</b>.Then I can use it to create a DIB Bitmap from
what is rendered off screen. <br>
<dd> <br>
<dd>I found the example of rendering in MFC and I tried the series of
instructions:<br>
<dd> <br>
<dd>this->window->SetupMemoryRendering(x,y,hdc);<br>
<dd>this->window->Render();<br>
<dd>StretchBlt(dc,0,0,x,y,memDC,0,0,x,y,SRCCOPY);<br>
<dd>this->window->ResumeScreenRendering();<br>
</b>
<dd> <br>
<dd>but all is displayed is a white </b>page. Especially because during
process, unsigned char* MemoryData</b> should be NULL.<br>
<dd> <br>
<dd>Please help me. <br>
<dd> <br>
<dd> <br>
<dd> <br><br>
<br>
<dd>Découvrez le nouveau Yahoo! Mail : <font color="#FF0000">1 Go
d'espace</font> de stockage pour vos mails, photos et vidéos !<br>
<dd>
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Créez votre Yahoo! Mail</a> <br><br>
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<dd>_______________________________________________<br>
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</dl><br><br>
<br>
<dd>-- <br>
<dd>Randall Hand<br>
<dd><a href="http://www.yeraze.com/">http://www.yeraze.com</a> <br><br>
</dl><br>
Découvrez le nouveau Yahoo! Mail : <font color="#FF0000">1 Go
d'espace</font> de stockage pour vos mails, photos et vidéos !<br>
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