Function test_dng_float_int

dlib/test/image.cpp:1729–1751

    }

    void test_dng_float_int()
    {
        dlog << LINFO << "in test_dng_float_int";
        print_spinner();

        array2d<uint16> img;
        assign_image(img, gaussian_randm(101,100)*10000);

        ostringstream sout;
        save_dng(img, sout);
        istringstream sin(sout.str());
        array2d<double> img2;
        load_dng(img2, sin);
        sout.clear(); sout.str("");

        save_dng(img2, sout);
        sin.clear(); sin.str(sout.str());
        array2d<uint16> img3;
        load_dng(img3, sin);

        // this whole thing should have been totally lossless.
        DLIB_TEST(mat(img) == mat(img3));
    }

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