findcontour_example check image empty

a81374c1 · ttagu99 · Dikay900 · 66fc6126 · a81374c1
Commit a81374c1 authored Apr 14, 2015 by ttagu99 Committed by Dikay900 Apr 24, 2015
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findContours_demo.cpp .../cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp +7 -2

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--- a/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp
+++ b/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp
@@ -26,8 +26,13 @@ void thresh_callback(int, void* );
 */
 int main( int, char** argv )
 {
-  /// Load source image and convert it to gray
-  src = imread( argv[1], 1 );
+  /// Load source image
+  src = imread(argv[1]);
+  if (src.empty())
+  {
+    cerr << "No image supplied ..." << endl;
+    return -1;
+  }

  /// Convert image to gray and blur it
  cvtColor( src, src_gray, COLOR_BGR2GRAY );