Merge remote-tracking branch 'upstream/3.4' into merge-3.4

cmake/OpenCVDetectInferenceEngine.cmake

@@ -129,9 +129,9 @@ endif()
 
 if(INF_ENGINE_TARGET)
   if(NOT INF_ENGINE_RELEASE)
-    message(WARNING "InferenceEngine version has not been set, 2020.1 will be used by default. Set INF_ENGINE_RELEASE variable if you experience build errors.")
+    message(WARNING "InferenceEngine version has not been set, 2020.2 will be used by default. Set INF_ENGINE_RELEASE variable if you experience build errors.")
   endif()
-  set(INF_ENGINE_RELEASE "2020010000" CACHE STRING "Force IE version, should be in form YYYYAABBCC (e.g. 2020.1.0.2 -> 2020010002)")
+  set(INF_ENGINE_RELEASE "2020020000" CACHE STRING "Force IE version, should be in form YYYYAABBCC (e.g. 2020.1.0.2 -> 2020010002)")
   set_target_properties(${INF_ENGINE_TARGET} PROPERTIES
     INTERFACE_COMPILE_DEFINITIONS "HAVE_INF_ENGINE=1;INF_ENGINE_RELEASE=${INF_ENGINE_RELEASE}"
   )

doc/py_tutorials/py_ml/py_svm/py_svm_basics/py_svm_basics.markdown

@@ -83,7 +83,7 @@ Let us define a kernel function \f$K(p,q)\f$ which does a dot product between tw
 \begin{aligned}
 K(p,q)  = \phi(p).\phi(q) &= \phi(p)^T \phi(q) \\
                           &= (p_{1}^2,p_{2}^2,\sqrt{2} p_1 p_2).(q_{1}^2,q_{2}^2,\sqrt{2} q_1 q_2) \\
-                          &= p_1 q_1 + p_2 q_2 + 2 p_1 q_1 p_2 q_2 \\
+                          &= p_{1}^2 q_{1}^2 + p_{2}^2 q_{2}^2 + 2 p_1 q_1 p_2 q_2 \\
                           &= (p_1 q_1 + p_2 q_2)^2 \\
           \phi(p).\phi(q) &= (p.q)^2
 \end{aligned}

modules/dnn/CMakeLists.txt

@@ -129,7 +129,13 @@ endif()
 
 set(dnn_runtime_libs "")
 if(INF_ENGINE_TARGET)
-  ocv_option(OPENCV_DNN_IE_NN_BUILDER_2019 "Build with Inference Engine NN Builder API support" ON)  # future: NOT HAVE_NGRAPH
+  set(use_nn_builder OFF)
+  if(TARGET inference_engine_nn_builder OR # custom imported target
+     TARGET IE::inference_engine_nn_builder OR # default imported target via InferenceEngineConfig.cmake
+     INF_ENGINE_RELEASE VERSION_LESS "2020000000") # compatibility with older versions on IE
+    set(use_nn_builder ON)
+  endif()
+  ocv_option(OPENCV_DNN_IE_NN_BUILDER_2019 "Build with Inference Engine NN Builder API support" ${use_nn_builder})  # future: NOT HAVE_NGRAPH
   if(OPENCV_DNN_IE_NN_BUILDER_2019)
     message(STATUS "DNN: Enabling Inference Engine NN Builder API support")
     add_definitions(-DHAVE_DNN_IE_NN_BUILDER_2019=1)

modules/dnn/src/ie_ngraph.cpp

@@ -77,7 +77,11 @@ public:
         return type_info;
     }
 
+#if INF_ENGINE_VER_MAJOR_GT(2020020000)
+    NgraphCustomOp(const ngraph::OutputVector& inputs,
+#else
     NgraphCustomOp(const ngraph::NodeVector& inputs,
+#endif
                    const std::map<std::string, InferenceEngine::Parameter>& params = {}):
         Op(inputs), params(params)
     {
@@ -103,7 +107,11 @@ public:
 
     std::shared_ptr<ngraph::Node> copy_with_new_args(const ngraph::NodeVector& new_args) const override
     {
+#if INF_ENGINE_VER_MAJOR_GT(2020020000)
+        return std::make_shared<NgraphCustomOp>(ngraph::as_output_vector(new_args), params);
+#else
         return std::make_shared<NgraphCustomOp>(new_args, params);
+#endif
     }
 
     bool visit_attributes(ngraph::AttributeVisitor& visitor) override
@@ -270,7 +278,11 @@ InfEngineNgraphNode::InfEngineNgraphNode(const std::vector<Ptr<BackendNode> >& n
         {"internals", shapesToStr(internals)}
     };
 
+#if INF_ENGINE_VER_MAJOR_GT(2020020000)
+    ngraph::OutputVector inp_nodes;
+#else
     ngraph::NodeVector inp_nodes;
+#endif
     for (const auto& node : nodes)
         inp_nodes.emplace_back(node.dynamicCast<InfEngineNgraphNode>()->node);
     node = std::make_shared<NgraphCustomOp>(inp_nodes, params);

modules/dnn/src/layers/blank_layer.cpp

@@ -147,7 +147,7 @@ public:
                                         const std::vector<Ptr<BackendNode> >& nodes) CV_OVERRIDE
     {
         auto& ieInpNode = nodes[0].dynamicCast<InfEngineNgraphNode>()->node;
-        ngraph::NodeVector inp{ieInpNode};
+        ngraph::OutputVector inp{ieInpNode};
         auto blank = std::make_shared<ngraph::op::Concat>(inp, 0);
         return Ptr<BackendNode>(new InfEngineNgraphNode(blank));
     }

modules/dnn/src/layers/concat_layer.cpp

@@ -358,7 +358,7 @@ public:
         std::vector<size_t> maxDims(numDims, 0);
 
         CV_Assert(inputs.size() == nodes.size());
-        ngraph::NodeVector inp_nodes;
+        ngraph::OutputVector inp_nodes;
         for (int i = 0; i < nodes.size(); ++i)
         {
             inp_nodes.push_back(nodes[i].dynamicCast<InfEngineNgraphNode>()->node);

modules/dnn/src/layers/pooling_layer.cpp

@@ -473,7 +473,7 @@ public:
             ieLayer.setRoundingType(ceilMode ?
                                     InferenceEngine::Builder::PoolingLayer::RoundingType::CEIL :
                                     InferenceEngine::Builder::PoolingLayer::RoundingType::FLOOR);
-            ieLayer.setExcludePad(type == AVE && padMode == "SAME");
+            ieLayer.setExcludePad(!avePoolPaddedArea);
 
             InferenceEngine::Builder::Layer l = ieLayer;
             if (!padMode.empty())

modules/dnn/src/op_inf_engine.hpp

@@ -24,10 +24,11 @@
 #define INF_ENGINE_RELEASE_2019R2 2019020000
 #define INF_ENGINE_RELEASE_2019R3 2019030000
 #define INF_ENGINE_RELEASE_2020_1 2020010000
+#define INF_ENGINE_RELEASE_2020_2 2020020000
 
 #ifndef INF_ENGINE_RELEASE
-#warning("IE version have not been provided via command-line. Using 2019.1 by default")
-#define INF_ENGINE_RELEASE INF_ENGINE_RELEASE_2020_1
+#warning("IE version have not been provided via command-line. Using 2020.2 by default")
+#define INF_ENGINE_RELEASE INF_ENGINE_RELEASE_2020_2
 #endif
 
 #define INF_ENGINE_VER_MAJOR_GT(ver) (((INF_ENGINE_RELEASE) / 10000) > ((ver) / 10000))
@@ -58,7 +59,9 @@
 
 #include <inference_engine.hpp>
 
+#ifdef HAVE_DNN_IE_NN_BUILDER_2019
 #include <ie_builders.hpp>
+#endif
 
 #if defined(__GNUC__) && INF_ENGINE_VER_MAJOR_LT(INF_ENGINE_RELEASE_2020_1)
 #pragma GCC visibility pop

modules/objdetect/src/qrcode.cpp

@@ -32,7 +32,7 @@ static bool checkQRInputImage(InputArray img, Mat& gray)
         return false;  // image data is not enough for providing reliable results
     }
     int incn = img.channels();
-    CV_Check(incn, incn == 1 || incn == 3 || incn == 3, "");
+    CV_Check(incn, incn == 1 || incn == 3 || incn == 4, "");
     if (incn == 3 || incn == 4)
     {
         cvtColor(img, gray, COLOR_BGR2GRAY);

modules/objdetect/test/test_cascadeandhog.cpp

@@ -1140,7 +1140,7 @@ void HOGDescriptorTester::compute(InputArray _img, vector<float>& descriptors,
     actual_hog->compute(img, actual_descriptors, winStride, padding, locations);
 
     double diff_norm = cvtest::norm(actual_descriptors, descriptors, NORM_L2 + NORM_RELATIVE);
-    const double eps = FLT_EPSILON * 100;
+    const double eps = 2.0e-3;
     if (diff_norm > eps)
     {
         ts->printf(cvtest::TS::SUMMARY, "Norm of the difference: %lf\n", diff_norm);
@@ -1289,7 +1289,7 @@ void HOGDescriptorTester::computeGradient(InputArray _img, InputOutputArray _gra
     const char* args[] = { "Gradient's", "Qangles's" };
     actual_hog->computeGradient(img, actual_mats[0], actual_mats[1], paddingTL, paddingBR);
 
-    const double eps = FLT_EPSILON * 100;
+    const double eps = 8.0e-3;
     for (i = 0; i < 2; ++i)
     {
        double diff_norm = cvtest::norm(actual_mats[i], reference_mats[i], NORM_L2 + NORM_RELATIVE);

modules/python/src2/hdr_parser.py

@@ -430,9 +430,10 @@ class CppHeaderParser(object):
         # filter off some common prefixes, which are meaningless for Python wrappers.
         # note that we do not strip "static" prefix, which does matter;
         # it means class methods, not instance methods
-        decl_str = self.batch_replace(decl_str, [("static inline", ""), ("inline", ""),\
-            ("CV_EXPORTS_W", ""), ("CV_EXPORTS", ""), ("CV_CDECL", ""), ("CV_WRAP ", " "), ("CV_INLINE", ""),
-            ("CV_DEPRECATED", ""), ("CV_DEPRECATED_EXTERNAL", "")]).strip()
+        decl_str = self.batch_replace(decl_str, [("static inline", ""), ("inline", ""), ("explicit ", ""),
+                                                 ("CV_EXPORTS_W", ""), ("CV_EXPORTS", ""), ("CV_CDECL", ""),
+                                                 ("CV_WRAP ", " "), ("CV_INLINE", ""),
+                                                 ("CV_DEPRECATED", ""), ("CV_DEPRECATED_EXTERNAL", "")]).strip()
 
 
         if decl_str.strip().startswith('virtual'):

modules/videoio/misc/java/test/VideoCaptureTest.java

@@ -35,10 +35,30 @@ public class VideoCaptureTest extends OpenCVTestCase {
         assertFalse(capture.isOpened());
     }
 
-    public void testVideoCapture() {
+    public void testDefaultConstructor() {
         capture = new VideoCapture();
         assertNotNull(capture);
         assertFalse(capture.isOpened());
     }
 
+    public void testConstructorWithFilename() {
+        capture = new VideoCapture("some_file.avi");
+        assertNotNull(capture);
+    }
+
+    public void testConstructorWithFilenameAndExplicitlySpecifiedAPI() {
+        capture = new VideoCapture("some_file.avi", Videoio.CAP_ANY);
+        assertNotNull(capture);
+    }
+
+    public void testConstructorWithIndex() {
+        capture = new VideoCapture(0);
+        assertNotNull(capture);
+    }
+
+    public void testConstructorWithIndexAndExplicitlySpecifiedAPI() {
+        capture = new VideoCapture(0, Videoio.CAP_ANY);
+        assertNotNull(capture);
+    }
+
 }