<DIV>Exact. But why do I have to pass with another filter whereas that my pixel data is already saved in memory? </DIV>
<DIV> </DIV>
<DIV>Have someone already used <STRONG>vtkImageData->GetScalarPointer(x,y,slice)</STRONG>. </DIV>
<DIV> </DIV>
<DIV>Maybe THIS could help me</DIV>
<DIV> </DIV>
<DIV>Isa<BR><BR><B><I>Amy Squillacote <amy.squillacote@kitware.com></I></B> a écrit :</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">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 class=cite cite="" type="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>
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<DD>-- <BR>
<DD>Randall Hand<BR>
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