Fix max aa channel deviation [-iwj]

diff --git a/pctb/structure.c b/pctb/structure.c
index 3a29760547565cc1e391c929d7f3f438f8f017e1..2bb6429602fdc790f6fb76a87c5a23e47c06f638 100644 (file)
--- a/pctb/structure.c
+++ b/pctb/structure.c
@@ -502,7 +502,7 @@ static void find_table_entry(Rect commod, int colno, Rect *cell) {
       alpha_mean += alpha_chan * (1/3.0);
     }
 
-    double thresh= 1.0/AAMAXVAL;
+    double thresh= 1.5/AAMAXVAL;
     double alpha_min= alpha_mean - thresh;
     double alpha_max= alpha_mean + thresh;
     for (i=0; i<3; i++)