From 6ab6ea299c472e4f5dbf55dc7e42448ce0ab5e53 Mon Sep 17 00:00:00 2001
From: Julius Hartung <julius.hartung@nhochdrei.de>
Date: Wed, 22 Jul 2020 14:31:38 +0200
Subject: [PATCH] tesseract crash fix

---
 src/openalpr/ocr/tesseract_ocr.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/openalpr/ocr/tesseract_ocr.cpp b/src/openalpr/ocr/tesseract_ocr.cpp
index 5d56d55..09f5d09 100644
--- a/src/openalpr/ocr/tesseract_ocr.cpp
+++ b/src/openalpr/ocr/tesseract_ocr.cpp
@@ -86,6 +86,8 @@ namespace alpr
         tesseract::PageIteratorLevel level = tesseract::RIL_SYMBOL;
         do
         {
+          if (ri->Empty(level)) continue;
+          
           const char* symbol = ri->GetUTF8Text(level);
           float conf = ri->Confidence(level);