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<p class=MsoNormal><span lang=EN-US>Hello<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I am going to import an bmp image by using
the vtkBMPReader which works fine.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>When I am going to access the pixels of the
image using “ image2->GetScalarComponentAsFloat(x,y,0,0) “ everything works
fine.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>When I display the first greyvalues in row
y=0 I get the following: 21,36,58,63,… which is correct.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Now I want to have a faster access… so I
create a pointer with the following commands:<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>vtkUnsignedCharArray* test=
vtkUnsignedCharArray::SafeDownCast(image2->GetPointData()->GetScalars());<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>test2=
test->GetPointer(VTK_UNSIGNED_CHAR);<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Now the value of test[0] is 36. So I cannot
access the first column of the image.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Can someone explain this behavior?<o:p></o:p></span></p>
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