--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Meerwald-dir/bruyn_common.h	Fri Dec 20 13:08:59 2024 +0100
@@ -0,0 +1,41 @@
+#ifndef BRUYN_COMMON_H
+#define BRUYN_COMMON_H
+
+#include "netpbm/pgm.h"
+
+// for block type classification
+#define BLOCKTYPE_UNKNOWN 0
+#define BLOCKTYPE_HARD 1
+#define BLOCKTYPE_PROGRESSIVE 2
+#define BLOCKTYPE_NOISE 3
+
+// thresholds
+#define THRESHOLD_NOISE 10.0
+#define THRESHOLD_SLOPE 5.0
+#define THRESHOLD_NOISE_USAGE "10.0"
+#define THRESHOLD_SLOPE_USAGE "5.0"
+
+// zone classification
+#define ZONE_VOID 0
+#define ZONE_1 1
+#define ZONE_2 2
+
+// category classification
+#define CATEGORY_VOID 0
+#define CATEGORY_A 4
+#define CATEGORY_B 8
+
+// classifiction = zone | category
+#define CLASSIFICATION_1A (ZONE_1 | CATEGORY_A)
+#define CLASSIFICATION_1B (ZONE_1 | CATEGORY_B)
+#define CLASSIFICATION_2A (ZONE_2 | CATEGORY_A)
+#define CLASSIFICATION_2B (ZONE_2 | CATEGORY_B)
+#define CLASSIFICATION_A CATEGORY_A
+#define CLASSIFICATION_B CATEGORY_B
+
+#define NPATTERN 3
+#define NPATTERN_USAGE "3"
+
+gray lookup_pattern(int pattern, int c, int r);
+
+#endif /* BRUYN_COMMON_H */