Added performance tests for findContours

modules/imgproc/perf/perf_contours.cpp

+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+#include "perf_precomp.hpp"
+
+namespace opencv_test {
+
+CV_ENUM(RetrMode, RETR_EXTERNAL, RETR_LIST, RETR_CCOMP, RETR_TREE)
+CV_ENUM(ApproxMode, CHAIN_APPROX_NONE, CHAIN_APPROX_SIMPLE, CHAIN_APPROX_TC89_L1, CHAIN_APPROX_TC89_KCOS)
+
+typedef TestBaseWithParam< tuple<Size, RetrMode, ApproxMode, int> > TestFindContours;
+
+PERF_TEST_P(TestFindContours, findContours,
+            Combine(
+               Values( szVGA, sz1080p ), // image size
+               RetrMode::all(), // retrieval mode
+               ApproxMode::all(), // approximation method
+               Values( 32, 128 ) // blob count
+            )
+           )
+{
+    Size img_size = get<0>(GetParam());
+    int retr_mode = get<1>(GetParam());
+    int approx_method = get<2>(GetParam());
+    int blob_count = get<3>(GetParam());
+
+    RNG rng;
+    Mat img = Mat::zeros(img_size, CV_8UC1);
+    for(int i = 0; i < blob_count; i++ )
+    {
+        Point center;
+        center.x = (unsigned)rng % (img.cols-2);
+        center.y = (unsigned)rng % (img.rows-2);
+        Size  axes;
+        axes.width = ((unsigned)rng % 49 + 2)/2;
+        axes.height = ((unsigned)rng % 49 + 2)/2;
+        double angle = (unsigned)rng % 180;
+        int brightness = (unsigned)rng % 2;
+
+        // keep the border clear
+        ellipse( img(Rect(1,1,img.cols-2,img.rows-2)), Point(center), Size(axes), angle, 0., 360., Scalar(brightness), -1);
+    }
+    vector< vector<Point> > contours;
+
+    TEST_CYCLE() findContours( img, contours, retr_mode, approx_method );
+
+    SANITY_CHECK_NOTHING();
+}
+
+typedef TestBaseWithParam< tuple<Size, ApproxMode, int> > TestFindContoursFF;
+
+PERF_TEST_P(TestFindContoursFF, findContours,
+    Combine(
+        Values(szVGA, sz1080p), // image size
+        ApproxMode::all(), // approximation method
+        Values(32, 128) // blob count
+    )
+)
+{
+    Size img_size = get<0>(GetParam());
+    int approx_method = get<1>(GetParam());
+    int blob_count = get<2>(GetParam());
+
+    RNG rng;
+    Mat img = Mat::zeros(img_size, CV_32SC1);
+    for (int i = 0; i < blob_count; i++)
+    {
+        Point center;
+        center.x = (unsigned)rng % (img.cols - 2);
+        center.y = (unsigned)rng % (img.rows - 2);
+        Size  axes;
+        axes.width = ((unsigned)rng % 49 + 2) / 2;
+        axes.height = ((unsigned)rng % 49 + 2) / 2;
+        double angle = (unsigned)rng % 180;
+        int brightness = (unsigned)rng % 2;
+
+        // keep the border clear
+        ellipse(img(Rect(1, 1, img.cols - 2, img.rows - 2)), Point(center), Size(axes), angle, 0., 360., Scalar(brightness), -1);
+    }
+    vector< vector<Point> > contours;
+
+    TEST_CYCLE() findContours(img, contours, RETR_FLOODFILL, approx_method);
+
+    SANITY_CHECK_NOTHING();
+}
+
+} // namespace