From 78202100df56b5c301d0fcbd1499a715e4ef5694 Mon Sep 17 00:00:00 2001
From: Suenghoon Park <pclove1@gmail.com>
Date: Mon, 24 Dec 2012 22:53:27 -0500
Subject: [PATCH] added unit test for HoughCircles

---
 modules/ocl/test/test_hough.cpp | 111 ++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 modules/ocl/test/test_hough.cpp

diff --git a/modules/ocl/test/test_hough.cpp b/modules/ocl/test/test_hough.cpp
new file mode 100644
index 0000000000..cdb6807f58
--- /dev/null
+++ b/modules/ocl/test/test_hough.cpp
@@ -0,0 +1,111 @@
+/*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.
+//
+//
+//                        Intel License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000, Intel Corporation, 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 Intel Corporation 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 "precomp.hpp"
+
+#ifdef HAVE_OPENCL
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////
+// HoughCircles
+
+PARAM_TEST_CASE(HoughCircles, cv::Size)
+{
+    static void drawCircles(cv::Mat& dst, const std::vector<cv::Vec3f>& circles, bool fill)
+    {
+        dst.setTo(cv::Scalar::all(0));
+
+        for (size_t i = 0; i < circles.size(); ++i)
+            cv::circle(dst, cv::Point2f(circles[i][0], circles[i][1]), (int)circles[i][2], cv::Scalar::all(255), fill ? -1 : 1);
+    }
+};
+
+TEST_P(HoughCircles, Accuracy)
+{
+    const cv::Size size = GET_PARAM(0);
+
+    const float dp = 2.0f;
+    const float minDist = 10.0f;
+    const int minRadius = 10;
+    const int maxRadius = 20;
+    const int cannyThreshold = 100;
+    const int votesThreshold = 15;
+
+    std::vector<cv::Vec3f> circles_gold(4);
+    circles_gold[0] = cv::Vec3i(20, 20, minRadius);
+    circles_gold[1] = cv::Vec3i(90, 87, minRadius + 3);
+    circles_gold[2] = cv::Vec3i(30, 70, minRadius + 8);
+    circles_gold[3] = cv::Vec3i(80, 10, maxRadius);
+
+    cv::Mat src(size, CV_8UC1);
+    drawCircles(src, circles_gold, true);
+    cv::ocl::oclMat d_src(src);
+
+    cv::ocl::oclMat d_circles;
+    cv::ocl::HoughCircles(d_src, d_circles, CV_HOUGH_GRADIENT, dp, minDist, cannyThreshold, votesThreshold, minRadius, maxRadius);
+    ASSERT_TRUE(d_circles.rows > 0);
+
+    cv::Mat circles;
+    d_circles.download(circles);
+
+    for (int i = 0; i < circles.cols; ++i)
+    {
+        cv::Vec3f cur = circles.at<cv::Vec3f>(i);
+
+        bool found = false;
+
+        for (size_t j = 0; j < circles_gold.size(); ++j)
+        {
+            cv::Vec3f gold = circles_gold[j];
+
+            if (std::fabs(cur[0] - gold[0]) < minDist && std::fabs(cur[1] - gold[1]) < minDist && std::fabs(cur[2] - gold[2]) < minDist)
+            {
+                found = true;
+                break;
+            }
+        }
+
+        ASSERT_TRUE(found);
+    }
+}
+
+INSTANTIATE_TEST_CASE_P(Hough, HoughCircles, DIFFERENT_SIZES);
+
+#endif // HAVE_OPENCL