From 3964ffa49fd908c9a3102ca1602b394e972f66b8 Mon Sep 17 00:00:00 2001
From: Matt Hill <matthill@gmail.com>
Date: Fri, 17 Oct 2014 11:34:13 -0400
Subject: [PATCH] Added angle checking so that text areas with vertical angles
 are rejected

---
 src/openalpr/textdetection/linefinder.cpp | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/openalpr/textdetection/linefinder.cpp b/src/openalpr/textdetection/linefinder.cpp
index db30e43..401537a 100644
--- a/src/openalpr/textdetection/linefinder.cpp
+++ b/src/openalpr/textdetection/linefinder.cpp
@@ -157,8 +157,18 @@ vector<Point> LineFinder::getBestLine(const TextContours contours, vector<Point>
           bottomRight = bottoms[i];
         }
         
-        topLines.push_back(LineSegment(topLeft, topRight));
-        bottomLines.push_back(LineSegment(bottomLeft, bottomRight));
+        
+        LineSegment top(topLeft, topRight);
+        LineSegment bottom(bottomLeft, bottomRight);
+        
+        // Only allow lines that have a sane angle
+        if (abs(top.angle) <= pipeline_data->config->maxPlateAngleDegrees &&
+            abs(bottom.angle) <= pipeline_data->config->maxPlateAngleDegrees)
+        {
+          topLines.push_back(top);
+          bottomLines.push_back(bottom);
+        }
+        
 
       }
     }