Merge branch '3.4' into merge-3.4

diff --cc modules/dnn/include/opencv2/dnn/dnn.hpp
Simple merge

diff --cc modules/dnn/include/opencv2/dnn/version.hpp
index 7d0f125,0000000..b41efda
mode 100644,000000..100644
--- 1/modules/dnn/include/opencv2/dnn/version.hpp
--- /dev/null
+++ b/modules/dnn/include/opencv2/dnn/version.hpp
@@@ -1,21 -1,0 +1,21 @@@
- #define OPENCV_DNN_API_VERSION 20181205
 +// 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.
 +
 +#ifndef OPENCV_DNN_VERSION_HPP
 +#define OPENCV_DNN_VERSION_HPP
 +
 +/// Use with major OpenCV version only.
++#define OPENCV_DNN_API_VERSION 20181221
 +
 +#if !defined CV_DOXYGEN && !defined CV_DNN_DONT_ADD_INLINE_NS
 +#define CV__DNN_INLINE_NS __CV_CAT(dnn4_v, OPENCV_DNN_API_VERSION)
 +#define CV__DNN_INLINE_NS_BEGIN namespace CV__DNN_INLINE_NS {
 +#define CV__DNN_INLINE_NS_END }
 +namespace cv { namespace dnn { namespace CV__DNN_INLINE_NS { } using namespace CV__DNN_INLINE_NS; }}
 +#else
 +#define CV__DNN_INLINE_NS_BEGIN
 +#define CV__DNN_INLINE_NS_END
 +#endif
 +
 +#endif  // OPENCV_DNN_VERSION_HPP

diff --cc modules/dnn/src/onnx/onnx_importer.cpp
Simple merge

diff --cc modules/dnn/src/op_inf_engine.hpp
Simple merge

diff --cc modules/dnn/src/torch/torch_importer.cpp
Simple merge

diff --cc modules/dnn/test/test_backends.cpp
Simple merge

diff --cc modules/imgproc/src/filter.cpp
Simple merge

diff --cc modules/imgproc/src/median_blur.cpp
Simple merge

diff --cc modules/imgproc/test/test_filter.cpp
Simple merge

diff --cc modules/objdetect/src/qrcode.cpp
Simple merge

diff --cc modules/videoio/src/cap_v4l.cpp
Simple merge

diff --cc modules/videoio/test/test_camera.cpp
index eb6fb60,d816f63..ac115b1
--- 1/modules/videoio/test/test_camera.cpp
--- 2/modules/videoio/test/test_camera.cpp
+++ b/modules/videoio/test/test_camera.cpp
@@@ -55,18 -56,39 +56,53 @@@ TEST(DISABLED_VideoIO_Camera, validate_
      capture.release();
  }
  
 +//Following test if for capture device using PhysConn_Video_SerialDigital as crossbar input pin
 +TEST(DISABLED_VideoIO_Camera, dshow_avermedia_capture)
 +{
 +    VideoCapture capture(0);
 +    ASSERT_TRUE(capture.isOpened());
 +    capture.set(CAP_PROP_CHANNEL, 6);
 +    std::cout << "Camera 0 via " << capture.getBackendName() << " backend" << std::endl;
 +    std::cout << "Frame width: " << capture.get(CAP_PROP_FRAME_WIDTH) << std::endl;
 +    std::cout << "     height: " << capture.get(CAP_PROP_FRAME_HEIGHT) << std::endl;
 +    std::cout << "Capturing FPS: " << capture.get(CAP_PROP_FPS) << std::endl;
 +    test_readFrames(capture);
 +    capture.release();
 +}
 +
+ TEST(DISABLED_VideoIO_Camera, validate_V4L2_FrameSize)
+ {
+     VideoCapture capture(CAP_V4L2);
+     ASSERT_TRUE(capture.isOpened());
+     std::cout << "Camera 0 via " << capture.getBackendName() << " backend" << std::endl;
+     std::cout << "Frame width: " << capture.get(CAP_PROP_FRAME_WIDTH) << std::endl;
+     std::cout << "     height: " << capture.get(CAP_PROP_FRAME_HEIGHT) << std::endl;
+     std::cout << "Capturing FPS: " << capture.get(CAP_PROP_FPS) << std::endl;
+     int fourcc = (int)capture.get(CAP_PROP_FOURCC);
+     std::cout << "FOURCC code: " << cv::format("0x%8x", fourcc) << std::endl;
+     test_readFrames(capture, 30);
+ 
+     EXPECT_TRUE(capture.set(CAP_PROP_FRAME_WIDTH, 640));
+     EXPECT_TRUE(capture.set(CAP_PROP_FRAME_HEIGHT, 480));
+     std::cout << "Frame width: " << capture.get(CAP_PROP_FRAME_WIDTH) << std::endl;
+     std::cout << "     height: " << capture.get(CAP_PROP_FRAME_HEIGHT) << std::endl;
+     std::cout << "Capturing FPS: " << capture.get(CAP_PROP_FPS) << std::endl;
+     Mat frame640x480;
+     test_readFrames(capture, 30, &frame640x480);
+     EXPECT_EQ(640, frame640x480.cols);
+     EXPECT_EQ(480, frame640x480.rows);
+ 
+     EXPECT_TRUE(capture.set(CAP_PROP_FRAME_WIDTH, 1280));
+     EXPECT_TRUE(capture.set(CAP_PROP_FRAME_HEIGHT, 720));
+     std::cout << "Frame width: " << capture.get(CAP_PROP_FRAME_WIDTH) << std::endl;
+     std::cout << "     height: " << capture.get(CAP_PROP_FRAME_HEIGHT) << std::endl;
+     std::cout << "Capturing FPS: " << capture.get(CAP_PROP_FPS) << std::endl;
+     Mat frame1280x720;
+     test_readFrames(capture, 30, &frame1280x720);
+     EXPECT_EQ(1280, frame1280x720.cols);
+     EXPECT_EQ(720, frame1280x720.rows);
+ 
+     capture.release();
+ }
+ 
  }} // namespace