Function make_simple_test_data

dlib/test/object_detector.cpp:214–269

        typename image_array_type
        >
    void make_simple_test_data (
        image_array_type& images,
        std::vector<std::vector<rectangle> >& object_locations
    )
    {
        images.clear();
        object_locations.clear();

        images.resize(3);
        images[0].set_size(400,400);
        images[1].set_size(400,400);
        images[2].set_size(400,400);

        // set all the pixel values to black
        assign_all_pixels(images[0], 0);
        assign_all_pixels(images[1], 0);
        assign_all_pixels(images[2], 0);

        // Now make some squares and draw them onto our black images. All the
        // squares will be 70 pixels wide and tall.

        std::vector<rectangle> temp;
        temp.push_back(centered_rect(point(100,100), 70,70)); 
        fill_rect(images[0],temp.back(),255); // Paint the square white
        temp.push_back(centered_rect(point(200,300), 70,70));
        fill_rect(images[0],temp.back(),255); // Paint the square white
        object_locations.push_back(temp);

        temp.clear();
        temp.push_back(centered_rect(point(140,200), 70,70));
        fill_rect(images[1],temp.back(),255); // Paint the square white
        temp.push_back(centered_rect(point(303,200), 70,70));
        fill_rect(images[1],temp.back(),255); // Paint the square white
        object_locations.push_back(temp);

        temp.clear();
        temp.push_back(centered_rect(point(123,121), 70,70));
        fill_rect(images[2],temp.back(),255); // Paint the square white
        object_locations.push_back(temp);

        // corrupt each image with random noise just to make this a little more 
        // challenging 
        dlib::rand rnd;
        for (unsigned long i = 0; i < images.size(); ++i)
        {
            for (long r = 0; r < images[i].nr(); ++r)
            {
                for (long c = 0; c < images[i].nc(); ++c)
                {
                    typedef typename image_array_type::type image_type;
                    typedef typename image_type::type type;
                    images[i][r][c] = (type)put_in_range(0,255,images[i][r][c] + 10*rnd.get_random_gaussian());
                }
            }
        }
    }

    template <