Thanks for the tip David.<div><br></div><div>Will I have any other limitations using qvtkwidget (QT widget) as well?</div><div><br></div><div>Thanks,</div><div>Luis<br><br><div class="gmail_quote">On Wed, Jun 30, 2010 at 9:32 AM, David Gobbi <span dir="ltr"><<a href="mailto:david.gobbi@gmail.com">david.gobbi@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">The vtkImageViewer classes are meant to be a "quick-and-dirty" way of<br>
displaying images. If you want to do anything beyond basic image<br>
display, you should use a vtkRenderWindow and a vtkImageActor. Then<br>
you have the full power of VTK available to you, with multiple actors,<br>
overlays, all the interactors, etcetera.<br>
<br>
David<br>
<br>
<br>
On Tue, Jun 29, 2010 at 11:13 PM, Luis Roberto P. Paula<br>
<div><div></div><div class="h5"><<a href="mailto:luisrpp@gmail.com">luisrpp@gmail.com</a>> wrote:<br>
> Thanks David!!<br>
> This is just what I was looking for!!<br>
> I'm curious on how to solve this using another actor for the marker since<br>
> I'm using vtkImageViewer2.<br>
> Thanks & Regards,<br>
> Luis<br>
> On Tue, Jun 29, 2010 at 8:30 AM, David Gobbi <<a href="mailto:david.gobbi@gmail.com">david.gobbi@gmail.com</a>> wrote:<br>
>><br>
>> Hi Luis,<br>
>><br>
>> The LUT can be set in a separate step, using vtkImageMapToColors. With<br>
>> vtkImageMapToColors, you can use SetOutputFormatToRGB() or<br>
>> SetOutputFormatToRGBA().<br>
>><br>
>> image1 -> vtkImageMapToColors (RGB) -> image1_rgb<br>
>> marker -> vtkImageMapToColors (RGBA) -> marger_rgba<br>
>><br>
>> (image1_rgb , marker_rgba) -> vtkImageBlend -> composite_rgb<br>
>><br>
>> Also, if your marker image is smaller than your main image, you can<br>
>> position it in the main image by using vtkImageChangeInformation:<br>
>><br>
>> marker -> vtkImageChangeInformation::SetExtentTranslation() -><br>
>> marker_new_position<br>
>><br>
>> By adjusting the vtkImageChangeInformation to change the extent of the<br>
>> second image input for vtkImageBlend, you can adjust where it will<br>
>> appear relative to the first image.<br>
>><br>
>> Another option (that does not use vtkImageBlend) is to use a separate<br>
>> actor for the marker.<br>
>><br>
>> David<br>
>><br>
>><br>
>><br>
>> On Mon, Jun 28, 2010 at 9:16 PM, Luis Roberto P. Paula<br>
>> <<a href="mailto:luisrpp@gmail.com">luisrpp@gmail.com</a>> wrote:<br>
>> > Hi All,<br>
>> ><br>
>> > I have two images:<br>
>> ><br>
>> > vtkImageData object; // Contains the object of interest - Grey scale<br>
>> > image (0 - 256)<br>
>> > vtkImageData marker; // Just the marker for the object - Binary Image<br>
>> > with same size of 'object'<br>
>> ><br>
>> > I need to display the marker over the object in a GUI. To do that, I`m<br>
>> > using the vtkImageBlend:<br>
>> ><br>
>> > vtkImageBlend* blend = vtkImageBlend::New();<br>
>> > blend->RemoveAllInputs();<br>
>> > blend->AddInput(object);<br>
>> > blend->AddInput(marker);<br>
>> > blend->SetOpacity(1, opacity);<br>
>> > blend->Update();<br>
>> ><br>
>> > Then, I'm setting the output image to a vtkImageViewer2.<br>
>> ><br>
>> > So far so good, but the problem is that I have to control the opacity to<br>
>> > see the marker.<br>
>> ><br>
>> > Is it possible to set a LUT for each image in vtkImageBlend, so I can<br>
>> > set the marker a different color for the marker, without the need to set<br>
>> > opacity?<br>
>> ><br>
>> > If this is not the correct approach to do this kind of effect, could<br>
>> > someone give me some guidance?<br>
>> ><br>
>> > Thanks & Regards,<br>
>> > Luis<br>
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><br>
><br>
</div></div></blockquote></div><br></div>