[Insight-users] add two images

[robert tamburo]

It's in the Review directory. I use it with 3.18 so 3.20 should be fine.
 Here's the code I use:
  typedef itk::LabelOverlayImageFilter<CharImageType, CharImageType,
RGBImageType> LabelOverlayFilterType;
  LabelOverlayFilterType::Pointer labelOverlayFilter =
LabelOverlayFilterType::New();
  labelOverlayFilter->SetInput(inputImage);
  labelOverlayFilter->SetLabelImage(labelImage);
  labelOverlayFilter->SetOpacity(1.0);
  labelOverlayFilter->ResetColors(); // reset color map
  labelOverlayFilter->AddColor(0, 0, 255); // fill color map with blue
  labelOverlayFilter->SetBackgroundValue(0); // don't overlay the
background, i.e., label 0
  labelOverlayFilter->Update();


On Wed, Jun 29, 2011 at 10:51 AM, john smith <mkitkinsightuser at gmail.com>wrote:

> Do you know if there is a good example of itkLabelOverlayImageFilter?
> Also, I am using ITK v3.2. Is itkLabelOverlayImageFilter suitable for this
> version?Because I can't find it in the libraries.
>
> Thanks
>
> 2011/6/29 robert tamburo <robert.tamburo at gmail.com>
>
>> I suggest using itkLabelOverlayImageFilter .  It applies a color map to a
>> label image (segmentation image) and overlays it on the original image with
>> the ability to adjust opacity of the overlay.
>>
>>
>> On Wed, Jun 29, 2011 at 10:29 AM, john smith <mkitkinsightuser at gmail.com>wrote:
>>
>>> The problem is that the segment of my original image is white. So If this
>>> part after the segmentation is also white, then the result of AddImageFilter
>>> will not be good, concerning visualization. Also, If this part is black
>>> after segmentation then I will not have any change using AddImageFilter.
>>> What you suggest to do in this case?
>>>
>>> Thanks for your response
>>>
>>>
>>> 2011/6/29 robert tamburo <robert.tamburo at gmail.com>
>>>
>>>> If your segmented object is black and black means zero-valued, then
>>>> you're adding zero to the original image.
>>>>
>>>> On Wed, Jun 29, 2011 at 10:14 AM, john smith <
>>>> mkitkinsightuser at gmail.com> wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> I want to read two png images (one is already saved in memory and the
>>>>> other I get it from a dialog box of Qt).The first is the result of the
>>>>> segmentation (black for the segmented object) and the second is the original
>>>>> image. I use AddImage filter as it can be seen from the foloowing code but I
>>>>> do not get the right result. Could somebody tell me what I am doing wrong?
>>>>> Is it correct to use two readers?
>>>>>
>>>>>  ReaderType::Pointer reader1 = ReaderType::New();
>>>>>   ReaderType::Pointer reader2 = ReaderType::New();
>>>>>
>>>>>   reader1->SetFileName(fileName.toStdString());
>>>>>   reader2->SetFileName("result.png");
>>>>>
>>>>>   reader1->Update();
>>>>>   reader2->Update();
>>>>>   typedef itk::AddImageFilter<
>>>>>             InternalImageType,
>>>>>             InternalImageType,
>>>>>             OutputImageType > AddFilterType;
>>>>>
>>>>>     AddFilterType::Pointer addFilter = AddFilterType::New();
>>>>>     addFilter->SetInput1( reader1->GetOutput() );
>>>>>     addFilter->SetInput2( reader2->GetOutput() );
>>>>>
>>>>>     try
>>>>>     {
>>>>>     addFilter->Update();
>>>>>     }
>>>>>     catch( itk::ExceptionObject & err )
>>>>>     {
>>>>>     std::cout << "ExceptionObject caught !" << std::endl;
>>>>>     std::cout << err << std::endl;
>>>>>     }
>>>>>
>>>>>     WriterType::Pointer writer = WriterType::New();
>>>>>     writer->SetInput( addFilter->GetOutput() );
>>>>>     writer->SetFileName( "addImage.png" );
>>>>>     writer->Update();
>>>>>
>>>>>
>>>>> 2011/6/29 robert tamburo <robert.tamburo at gmail.com>
>>>>>
>>>>>> itkAddImageFilter
>>>>>>
>>>>>> Alternatively, itkLabelOverlayImageFilter will allow you to overlay
>>>>>> your segmentation on the original image.
>>>>>>
>>>>>> On Wed, Jun 29, 2011 at 3:17 AM, john smith <
>>>>>> mkitkinsightuser at gmail.com> wrote:
>>>>>>
>>>>>>> Hello to all,
>>>>>>>
>>>>>>> I am working in an application in order to segment an object. Well, I
>>>>>>> have managed to get the segmented contour of my object. But now I want to
>>>>>>> display this result over my initial image. Do you know how I could add two
>>>>>>> images?
>>>>>>>
>>>>>>> Thanks in advance
>>>>>>>
>>>>>>>
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>>>>>>
>>>>>
>>>>
>>>
>>
>
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