Function ignore_overlapped_boxes

examples/dnn_instance_segmentation_train_ex.cpp:505–538

// ----------------------------------------------------------------------------------------

int ignore_overlapped_boxes(
    std::vector<truth_instance>& truth_instances,
    const test_box_overlap& overlaps
)
/*!
    ensures
        - Whenever two rectangles in boxes overlap, according to overlaps(), we set the
          smallest box to ignore.
        - returns the number of newly ignored boxes.
!*/
{
    int num_ignored = 0;
    for (size_t i = 0, end = truth_instances.size(); i < end; ++i)
    {
        auto& box_i = truth_instances[i].mmod_rect;
        if (box_i.ignore)
            continue;
        for (size_t j = i+1; j < end; ++j)
        {
            auto& box_j = truth_instances[j].mmod_rect;
            if (box_j.ignore)
                continue;
            if (overlaps(box_i, box_j))
            {
                ++num_ignored;
                if(box_i.rect.area() < box_j.rect.area())
                    box_i.ignore = true;
                else
                    box_j.ignore = true;
            }
        }
    }
    return num_ignored;
}

std::vector<truth_instance> load_truth_instances(const image_info& info)
{