[vtkusers] blending DICOM images

[Sam Raby]

I realized my code for blending DICOM images is correct and the problem was
with the visualization; so I just needed to update the QVTKWidget by adding
myQVTKWidgetObj->Update() to my code.




On Tue, Feb 18, 2014 at 6:36 PM, Sam Raby <rabysam28 at gmail.com> wrote:

> I guess I would like to know if there is any trivial error in my code. I
> have seen usage of vtkBlendImage for 2D images [1]. but what I have done in
> my code is that I am blending the whole 3D volume of the two DICOM series,
> as I did not find any other way.
>
> The code does not have compilation error, but the result seems sort of
> random; sometimes it jumps to another slice when I change the blending
> ratio, while I have already verified that image dimension, image spacing
> and image origin of both volumes are equal.
>
> [1] http://www.vtk.org/Wiki/VTK/Examples/Cxx/Images/CombineImages
>
>
> On Tue, Feb 18, 2014 at 6:21 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:
>
>> Does not work, does not help.
>> On Feb 18, 2014 6:52 PM, "Sam Raby" <rabysam28 at gmail.com> wrote:
>>
>>>  Hello,
>>>
>>> I am using vtkBlendImage to overlay two DICOM images. The two images are
>>> already perfectly co-registered.
>>>
>>> To overlay them, I am using the following code, but it does not work
>>> well. Would you advice if there is any problem with the code? Thanks!
>>>
>>>     reader1->SetDirectoryName("/home/dicomDIR1");
>>>
>>>     reader1->Update();
>>>
>>>
>>>     reader2->SetDirectoryName("/home/dicomDIR2");
>>>
>>>     reader2->Update();
>>>
>>>
>>>     blend->AddInputConnection(reader1->GetOutputPort());
>>>
>>>     blend->AddInputConnection(reader2->GetOutputPort());
>>>
>>>
>>>     blend->SetOpacity(0,0.5);
>>>
>>>     blend->SetOpacity(1,0.5);
>>>
>>>     imageViewer->SetInputConnection(blend->GetOutputPort());
>>>
>>>     imageViewer->SetSlice(oneSlice);
>>>
>>>
>>>
>>>
>>>
>>>
>>>
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