From b6469f5326453c6cadb5983c059d51bc2d6e6645 Mon Sep 17 00:00:00 2001
From: Roberto Carvajal <roberto.carvajal@gmail.com>
Date: Thu, 30 Apr 2015 16:17:31 -0300
Subject: [PATCH] fixed assertion in gpu detector

---
 src/openalpr/detection/detectorcuda.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/openalpr/detection/detectorcuda.cpp b/src/openalpr/detection/detectorcuda.cpp
index 39dbfc7..83d4628 100644
--- a/src/openalpr/detection/detectorcuda.cpp
+++ b/src/openalpr/detection/detectorcuda.cpp
@@ -53,7 +53,15 @@ namespace alpr
   {
 
     Mat frame_gray;
-    cvtColor( frame, frame_gray, CV_BGR2GRAY );
+
+    if (frame.channels() > 2)
+    {
+      cvtColor( frame, frame_gray, CV_BGR2GRAY );
+    }
+    else
+    {
+      frame.copyTo(frame_gray);
+    }
 
     vector<PlateRegion> detectedRegions;
     for (int i = 0; i < regionsOfInterest.size(); i++)