// Corresponding points between 'burgher1_small.jpg' and 'burgher2_small.jpg'
  double x1[] = {  158,    3,   56,   93,  125,  105,  213,  178,  244,  284,  
                   345,  347,  341,  355,  297,  322,  300,  122,  194,  171,  
                   149,  148,  135,  114,  225,  199,  200,  143,  138,  171,  
                     7,    9,    9,   31,   77,   33,   78,  131,  111,  273,  
                   256,  256,  321,  340,  355,  144 };
  double y1[] = {  107,   77,   88,   96,   77,   61,   42,   29,   75,   56,  
                    80,  111,  134,  138,  131,  127,  115,  168,  163,  188, 
                   217,  230,  237,  219,  226,  223,  212,  201,  151,  151,  
                   114,  100,   87,  157,  153,  125,  127,  130,  130,  132,  
                   134,  154,  158,  160,  160,  50 };
  double x2[] = {  189,   19,   74,  112,  142,  120,  229,  194,  258,  304,  
                   365,  365,  355,  374,  312,  336,  313,  155,  225,  203,  
                   180,  180,  169,  150,  258,  232,  228,  176,  171,  203,  
                    27,   27,   26,   49,   96,   53,   96,  147,  127,  286,  
                   272,  273,  338,  356,  374,  158 };
  double y2[] = {   97,   63,   76,   84,   63,   47,   29,   16,   65,   46,  
                    68,  100,  124,  126,  121,  118,  103,  157,  152,  177,  
                   204,  216,  222,  205,  216,  210,  200,  189,  139,  138,  
                   102,   89,   74,  145,  139,  111,  113,  118,  116,  119,  
                   122,  142,  147,  148,  150,  37 };