[Insight-users] Labeling an image and displaying results with distinguished levels of gray/colors

[Malsoaz James]

Hello, I'm trying to label a binary image. For that, I have been using ConnectedComponentImageFilter and RelabelComponentImageFilter with no problem apparently.

I'm able to get the number of objects and the size of them. But I can't figure out how to display the objects found in the image with different levels of gray (prefered solution) or different colors. Indeed, I'm getting an almost black image where I can difficultly distinguish the objects.

I would really appreciate some help to solve this.
Thank you.
James

By the way, here is my code:

typedef unsigned char PixelType;
typedef itk::Image<PixelType, 2> ImageType;
typedef itk::ImageFileReader<ImageType> ReaderType;
typedef itk::ImageFileWriter<ImageType> WriterType;
typedef itk::ConnectedComponentImageFilter <ImageType, ImageType> LabelType;
typedef itk::RelabelComponentImageFilter <ImageType, ImageType> RelabelType;


int main(int argc, char *argv[])
{
    ReaderType::Pointer reader = ReaderType::New();
    WriterType::Pointer writer = WriterType::New();
    LabelType::Pointer labeler = LabelType::New();
    RelabelType::Pointer relabeler = RelabelType::New();

    reader->SetFileName("input.bmp");

    labeler->SetInput(reader->GetOutput());
    labeler->Update();

    relabeler->SetInput(labeler->GetOutput());
    relabeler->Update();

    for (unsigned int i=0; i<relabeler->GetNumberOfObjects(); i++)
    {
        std::cout<<"Number of pixel for object "<<i<<": "<<relabeler->GetSizeOfObjectsInPixels()[i]<<std::endl;
    }
    writer->SetFileName("output.bmp");
    writer->SetInput(relabeler->GetOutput());
    writer->Update();
    return EXIT_SUCCESS;

}



      
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