[vtkusers] Bug in vtkImageviewer2 when one of the image dimension exeeds 512!!!

[Mark Wyszomierski]

I've been using vtkImageViewer2 for several months with dimensions
greater than 512 across multiple platforms and haven't experienced any
problems. Are you sure that's the problem?

Mark

On 7/4/05, lydia safid <safid_lydia at yahoo.fr> wrote:
> 
> 
> 
> Hello
> I have posted 4 months ago, a bug concerning vtkImageviewer2, the bug ID is
> 1641, I was wondering when will it be fixed
> thanks
> Lydia
> 
> lydia safid <safid_lydia at yahoo.fr> a écrit :
> 
> 
> 
> 
> 
> 
> Hi Folks!
> 
> I already posted a mail concerning this problem but now I am quite sure that
> the problem is in the class vtkImageViewer2. This class cannot display
> images when either the width or the height exceeds 512!!
> 
> Below is my code, I tried to attach the images but it could not be posted by
> the mailing list
> 
> you will notice the following:
> 
> 1. With vtkImageViewer2, the display is not corret (the second dimension of
> the image is 611)
> 
> 2. If you use vtkImageViewer instead of vtkImageViewer2, it will properly..(
> Strange! isn't it?)
> 
> 3. Another remark, if you replace i by 5 for example or any number less than
> dim[2], and if you set up a breakpoint after viewer->Render(), you will
> notive that the first display is done properly, then if you continue inside
> the "while", the same image will not be displayed properly...
> 
> Hope all these information will help you to help me because I spent so many
> time in debugging my program thinking that the bug was from me.... So, If
> you already experienced the problem, please let me know about it it is
> urgent
> 
> Thanks in advance
> 
> #include"vtkStructuredPointsReader.h" 
> 
> #include"vtkStructuredPoints.h" 
> 
> #include"vtkImageImport.h" 
> 
> #include"vtkImageViewer.h" 
> 
> #include"vtkImageViewer2.h" 
> 
>  
> 
> voidmain () 
> 
> {
> 
> vtkStructuredPointsReader
> *reader=vtkStructuredPointsReader::New();
> 
> reader->SetFileName("C:/TEMP/MRI.vtk");
> 
> reader->Update();
> 
> int dim[3]; double spacing [3]; 
> 
> reader->GetOutput()->GetDimensions(dim);
> 
> reader->GetOutput()->GetSpacing(spacing);
> 
> vtkStructuredPoints *dcm_volume=vtkStructuredPoints::New();
> 
> dcm_volume->SetDimensions(dim[0],dim[1],dim[2]);
> 
> dcm_volume->SetScalarType(VTK_UNSIGNED_CHAR);
> 
> dcm_volume->SetNumberOfScalarComponents(1);
> 
> dcm_volume->AllocateScalars();
> 
> dcm_volume->DeepCopy(reader->GetOutput());
> 
> vtkImageViewer2 *viewer = vtkImageViewer2::New();
> 
> inti=0; 
> 
> while(i<dim[2]) 
> 
> {
> 
> unsigned char *vol1= new unsigned char[(dim[0]*dim[1])/sizeof( unsigned
> char)]; 
> 
> memmove(vol1, (unsigned char
> *)dcm_volume->GetScalarPointer()+i*(dim[0]*dim[1]),dim[0]*dim[1]);
> 
> 
> 
> vtkImageImport *importer_pro=vtkImageImport::New();
> 
> importer_pro->SetWholeExtent(0,dim[0]-1,0,dim[1]-1,1,1);
> 
> importer_pro->SetDataExtent(0,dim[0]-1,0,dim[1]-1,1,1);
> 
> importer_pro->SetDataSpacing(1,1,1);
> 
> importer_pro->SetDataOrigin(0, 0,0);
> 
> importer_pro->SetDataScalarType(VTK_UNSIGNED_CHAR);
> 
> importer_pro->SetNumberOfScalarComponents(1);
> 
> importer_pro->SetImportVoidPointer((unsigned char *) vol1);
> 
> importer_pro->Update();
> 
> 
> 
> viewer->SetSize(500,500);
> 
> viewer->SetInput(importer_pro->GetOutput() );
> 
> viewer->SetZSlice(1);
> 
> viewer->SetColorWindow(255);
> 
> viewer->SetColorLevel(127.5);
> 
> viewer->Render();
> 
> i++;
> 
> delete [] vol1; 
> 
> importer_pro->Delete();
> 
> }
> 
> }
> 
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> > ATTACHMENT part 2 application/x-zip-compressed name=MRI.zip
> 
> 
> 
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