--- /dev/null
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+// By downloading, copying, installing or using the software you agree to this license.
+// If you do not agree to this license, do not download, install,
+// copy or use the software.
+//
+//
+// License Agreement
+// For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+// * Redistribution's of source code must retain the above copyright notice,
+// this list of conditions and the following disclaimer.
+//
+// * Redistribution's in binary form must reproduce the above copyright notice,
+// this list of conditions and the following disclaimer in the documentation
+// and/or other materials provided with the distribution.
+//
+// * The name of the copyright holders may not be used to endorse or promote products
+// derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "test_precomp.hpp"
+#include <string>
+
+using namespace cv;
+using namespace std;
+
+class CV_ConnectedComponentsTest : public cvtest::BaseTest
+{
+public:
+ CV_ConnectedComponentsTest();
+ ~CV_ConnectedComponentsTest();
+protected:
+ void run(int);
+};
+
+CV_ConnectedComponentsTest::CV_ConnectedComponentsTest() {}
+CV_ConnectedComponentsTest::~CV_ConnectedComponentsTest() {}
+
+void CV_ConnectedComponentsTest::run( int /* start_from */)
+{
+ string exp_path = string(ts->get_data_path()) + "connectedcomponents/ccomp_exp.png";
+ Mat exp = imread(exp_path, 0);
+ Mat orig = imread(string(ts->get_data_path()) + "connectedcomponents/concentric_circles.png", 0);
+
+ if (orig.empty())
+ {
+ ts->set_failed_test_info( cvtest::TS::FAIL_INVALID_TEST_DATA );
+ return;
+ }
+
+ Mat bw = orig > 128;
+ Mat labelImage;
+ int nLabels = connectedComponents(bw, labelImage, 8, CV_32S);
+
+ for(int r = 0; r < labelImage.rows; ++r){
+ for(int c = 0; c < labelImage.cols; ++c){
+ int l = labelImage.at<int>(r, c);
+ bool pass = l >= 0 && l <= nLabels;
+ if(!pass){
+ ts->set_failed_test_info( cvtest::TS::FAIL_INVALID_OUTPUT );
+ return;
+ }
+ }
+ }
+
+ if( exp.empty() || orig.size() != exp.size() )
+ {
+ imwrite(exp_path, labelImage);
+ exp = labelImage;
+ }
+
+ if (0 != norm(labelImage > 0, exp > 0, NORM_INF))
+ {
+ ts->set_failed_test_info( cvtest::TS::FAIL_MISMATCH );
+ return;
+ }
+ if (nLabels != norm(labelImage, NORM_INF)+1)
+ {
+ ts->set_failed_test_info( cvtest::TS::FAIL_MISMATCH );
+ return;
+ }
+ ts->set_failed_test_info(cvtest::TS::OK);
+}
+
+TEST(Imgproc_ConnectedComponents, regression) { CV_ConnectedComponentsTest test; test.safe_run(); }
+