chore: import upstream snapshot with attribution

2026-07-13 12:06:04 +08:00
commit 86c9b1c39f
7743 changed files with 3316339 additions and 0 deletions
@@ -0,0 +1,108 @@
+// 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 "test_precomp.hpp"
+#include "opencv2/video/background_segm.hpp"
+
+namespace opencv_test { namespace {
+
+using namespace cv;
+
+///////////////////////// MOG2 //////////////////////////////
+TEST(BackgroundSubtractorMOG2, KnownForegroundMaskShadowsTrue)
+{
+    Ptr<BackgroundSubtractorMOG2> mog2 = createBackgroundSubtractorMOG2(500, 16, true);
+
+    //Black Frame
+    Mat input = Mat::zeros(480,640 , CV_8UC3);
+
+    //White Rectangle
+    Mat knownFG = Mat::zeros(input.size(), CV_8U);
+
+    rectangle(knownFG, Rect(3,3,5,5), Scalar(255,255,255), -1);
+
+    Mat output;
+    mog2->apply(input, knownFG, output);
+
+    for(int y = 3; y < 8; y++)
+    {
+        for (int x = 3; x < 8; x++){
+            EXPECT_EQ(255,output.at<uchar>(y,x)) << "Expected foreground at (" << x << "," << y << ")";
+        }
+    }
+}
+
+TEST(BackgroundSubtractorMOG2, KnownForegroundMaskShadowsFalse)
+{
+    Ptr<BackgroundSubtractorMOG2> mog2 = createBackgroundSubtractorMOG2(500, 16, false);
+
+    //Black Frame
+    Mat input = Mat::zeros(480,640 , CV_8UC3);
+
+    //White Rectangle
+    Mat knownFG = Mat::zeros(input.size(), CV_8U);
+
+    rectangle(knownFG, Rect(3,3,5,5), Scalar(255,255,255), FILLED);
+
+    Mat output;
+    mog2->apply(input, knownFG, output);
+
+    for(int y = 3; y < 8; y++)
+    {
+        for (int x = 3; x < 8; x++){
+            EXPECT_EQ(255,output.at<uchar>(y,x)) << "Expected foreground at (" << x << "," << y << ")";
+        }
+    }
+}
+
+///////////////////////// KNN //////////////////////////////
+
+TEST(BackgroundSubtractorKNN, KnownForegroundMaskShadowsTrue)
+{
+    Ptr<BackgroundSubtractorKNN> knn = createBackgroundSubtractorKNN(500, 400.0, true);
+
+    //Black Frame
+    Mat input = Mat::zeros(480,640 , CV_8UC3);
+
+    //White Rectangle
+    Mat knownFG = Mat::zeros(input.size(), CV_8U);
+
+    rectangle(knownFG, Rect(3,3,5,5), Scalar(255,255,255), FILLED);
+
+    Mat output;
+    knn->apply(input, knownFG, output);
+
+    for(int y = 3; y < 8; y++)
+    {
+        for (int x = 3; x < 8; x++){
+            EXPECT_EQ(255,output.at<uchar>(y,x)) << "Expected foreground at (" << x << "," << y << ")";
+        }
+    }
+}
+
+TEST(BackgroundSubtractorKNN, KnownForegroundMaskShadowsFalse)
+{
+    Ptr<BackgroundSubtractorKNN> knn = createBackgroundSubtractorKNN(500, 400.0, false);
+
+    //Black Frame
+    Mat input = Mat::zeros(480,640 , CV_8UC3);
+
+    //White Rectangle
+    Mat knownFG = Mat::zeros(input.size(), CV_8U);
+
+    rectangle(knownFG, Rect(3,3,5,5), Scalar(255,255,255), FILLED);
+
+    Mat output;
+    knn->apply(input, knownFG, output);
+
+    for(int y = 3; y < 8; y++)
+    {
+        for (int x = 3; x < 8; x++){
+            EXPECT_EQ(255,output.at<uchar>(y,x)) << "Expected foreground at (" << x << "," << y << ")";
+        }
+    }
+}
+
+}} // namespace
+/* End of file. */