+/* Configuration */
+extern uns image_sig_min_width, image_sig_min_height;
+extern uns *image_sig_prequant_thresholds;
+extern uns image_sig_postquant_min_steps, image_sig_postquant_max_steps, image_sig_postquant_threshold;
+extern double image_sig_border_size;
+extern int image_sig_border_bonus;
+extern double image_sig_inertia_scale[];
+extern double image_sig_textured_threshold;
+extern int image_sig_compare_method;
+extern uns image_sig_cmp_features_weights[];
+