void testWarp() {
    // Make your own test !
    vector<Segment> segsBefore;
    Vec2f P1(56,111);
    Vec2f Q1(69,90);

    Vec2f P2(97,98);
    Vec2f Q2(119,104);
    segsBefore.push_back(Segment(P1,Q1));
    segsBefore.push_back(Segment(P2,Q2));

    vector<Segment> segsAfter;
    Vec2f P3(71,90);
    Vec2f Q3(89,60);

    Vec2f P4(81,82);
    Vec2f Q4(100,89);
    segsAfter.push_back(Segment(P3,Q3));
    segsAfter.push_back(Segment(P4,Q4));

    Image fredo("./Input/fredo2.png");
    Image warped = warp(fredo,segsBefore,segsAfter);
    warped.write("./Output/fredo_warped.png");
}