Esempi in C++ (Cpp) per ivec::set_size

Esempio n. 1

File: SampleLocalIntensity.cpp Progetto: cbutakoff/tools

void SampleGradHistogram(double *pt, double radius, typename TImage::Pointer image, arma::ivec& samples)
{
    typedef TImage ImageType;

    int radius_pix[3]; //radius in voxels, to be calculated


    radius_pix[0] = std::ceil(radius / image->GetSpacing()[0]);
    radius_pix[1] = std::ceil(radius / image->GetSpacing()[1]);
    radius_pix[2] = std::ceil(radius / image->GetSpacing()[2]);
    
#ifdef DEBUG_MESSAGES_HOG
    std::cout << "Requested point: " << pt[0] << ", " << pt[1] << ", " << pt[2] << std::endl;
    std::cout << "Neighborhood size in mm: " << radius << std::endl;
    std::cout << "Neighborhood size in pix: " << radius_pix[0] << ", " << radius_pix[1] << ", " << radius_pix[2] << std::endl;
#endif
    
    if (radius_pix[0] == 0 || radius_pix[1] == 0 || radius_pix[2] == 0) {
        std::cout << "One of the neighborhood dimensions is zero. Please correct the radius. Aborting." << std::endl;
        return;
    }


    //transform the point from physical s1pace
    typename ImageType::PointType point;
    point[0] = pt[0];
    point[1] = pt[1];
    point[2] = pt[2];

    typename ImageType::IndexType pt_pix;
    image->TransformPhysicalPointToIndex(point, pt_pix);


    //define the region around the point of interest
    typename ImageType::IndexType rgn_idx = {
        {pt_pix[0] - radius_pix[0], pt_pix[1] - radius_pix[1], pt_pix[2] - radius_pix[2]}};
    typename ImageType::SizeType rgn_size = {
        {2 * radius_pix[0] + 1, 2 * radius_pix[1] + 1, 2 * radius_pix[2] + 1}};

    //crop the region so that it is inside
    rgn_idx[0] = std::max(rgn_idx[0], image->GetLargestPossibleRegion().GetIndex(0));
    rgn_idx[1] = std::max(rgn_idx[1], image->GetLargestPossibleRegion().GetIndex(1));
    rgn_idx[2] = std::max(rgn_idx[2], image->GetLargestPossibleRegion().GetIndex(2));

    //set it first as a corner for comparison and then undo that operation
    rgn_size[0] = std::min(rgn_size[0]+rgn_idx[0], image->GetLargestPossibleRegion().GetSize(0))-rgn_idx[0];
    rgn_size[1] = std::min(rgn_size[1]+rgn_idx[1], image->GetLargestPossibleRegion().GetSize(1))-rgn_idx[1];
    rgn_size[2] = std::min(rgn_size[2]+rgn_idx[2], image->GetLargestPossibleRegion().GetSize(2))-rgn_idx[2];

    typename ImageType::RegionType window(rgn_idx, rgn_size);

#ifdef DEBUG_MESSAGES_HOG
    std::cout << "Region: " << window << std::endl;
#endif

    samples.set_size(rgn_size[0]*rgn_size[1]*rgn_size[2]);
    samples.zeros();
    
//    itk::ImageRegionConstIterator<typename GradientFilterType::OutputImageType> imageIterator(gradient_filter->GetOutput(), window);
    itk::ImageRegionConstIterator<ImageType> imageIterator(image, window);
    imageIterator.GoToBegin();
    
    int i=0;
    while (!imageIterator.IsAtEnd()) {
        // Get the value of the current pixel
        typename ImageType::PixelType val = imageIterator.Get();
    
        //std::cout << val << std::endl;
            
        samples[i++] = val;
        
        ++imageIterator;
    }

    
       
}