Merge pull request #18282 from alalek:update_version_3.4.12-pre

doc/tutorials/dnn/dnn_android/dnn_android.markdown

@@ -15,7 +15,7 @@ Tutorial was written for the following versions of corresponding software:
 
 - Download and install Android Studio from https://developer.android.com/studio.
 
-- Get the latest pre-built OpenCV for Android release from https://github.com/opencv/opencv/releases and unpack it (for example, `opencv-3.4.11-android-sdk.zip`).
+- Get the latest pre-built OpenCV for Android release from https://github.com/opencv/opencv/releases and unpack it (for example, `opencv-3.X.Y-android-sdk.zip`).
 
 - Download MobileNet object detection model from https://github.com/chuanqi305/MobileNet-SSD. We need a configuration file `MobileNetSSD_deploy.prototxt` and weights `MobileNetSSD_deploy.caffemodel`.
 

doc/tutorials/introduction/cross_referencing/tutorial_cross_referencing.markdown

@@ -39,14 +39,14 @@ Open your Doxyfile using your favorite text editor and search for the key
 `TAGFILES`. Change it as follows:
 
 @code
-TAGFILES = ./docs/doxygen-tags/opencv.tag=http://docs.opencv.org/3.4.11
+TAGFILES = ./docs/doxygen-tags/opencv.tag=http://docs.opencv.org/3.4.12
 @endcode
 
 If you had other definitions already, you can append the line using a `\`:
 
 @code
 TAGFILES = ./docs/doxygen-tags/libstdc++.tag=https://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen \
-           ./docs/doxygen-tags/opencv.tag=http://docs.opencv.org/3.4.11
+           ./docs/doxygen-tags/opencv.tag=http://docs.opencv.org/3.4.12
 @endcode
 
 Doxygen can now use the information from the tag file to link to the OpenCV

modules/core/include/opencv2/core/version.hpp

@@ -7,8 +7,8 @@
 
 #define CV_VERSION_MAJOR    3
 #define CV_VERSION_MINOR    4
-#define CV_VERSION_REVISION 11
-#define CV_VERSION_STATUS   "-dev"
+#define CV_VERSION_REVISION 12
+#define CV_VERSION_STATUS   "-pre"
 
 #define CVAUX_STR_EXP(__A)  #__A
 #define CVAUX_STR(__A)      CVAUX_STR_EXP(__A)

modules/dnn/include/opencv2/dnn/dnn.hpp

@@ -47,9 +47,9 @@
 #include "opencv2/core/async.hpp"
 
 #if !defined CV_DOXYGEN && !defined CV_STATIC_ANALYSIS && !defined CV_DNN_DONT_ADD_EXPERIMENTAL_NS
-#define CV__DNN_EXPERIMENTAL_NS_BEGIN namespace experimental_dnn_34_v18 {
+#define CV__DNN_EXPERIMENTAL_NS_BEGIN namespace experimental_dnn_34_v19 {
 #define CV__DNN_EXPERIMENTAL_NS_END }
-namespace cv { namespace dnn { namespace experimental_dnn_34_v18 { } using namespace experimental_dnn_34_v18; }}
+namespace cv { namespace dnn { namespace experimental_dnn_34_v19 { } using namespace experimental_dnn_34_v19; }}
 #else
 #define CV__DNN_EXPERIMENTAL_NS_BEGIN
 #define CV__DNN_EXPERIMENTAL_NS_END

modules/python/package/setup.py

@@ -9,7 +9,7 @@ def main():
     os.chdir(SCRIPT_DIR)
 
     package_name = 'opencv'
-    package_version = os.environ.get('OPENCV_VERSION', '3.4.11')  # TODO
+    package_version = os.environ.get('OPENCV_VERSION', '3.4.12')  # TODO
 
     long_description = 'Open Source Computer Vision Library Python bindings'  # TODO
 

platforms/android/build_sdk.py

@@ -269,7 +269,7 @@ class Builder:
         # Add extra data
         apkxmldest = check_dir(os.path.join(apkdest, "res", "xml"), create=True)
         apklibdest = check_dir(os.path.join(apkdest, "libs", abi.name), create=True)
-        for ver, d in self.extra_packs + [("3.4.11", os.path.join(self.libdest, "lib"))]:
+        for ver, d in self.extra_packs + [("3.4.12", os.path.join(self.libdest, "lib"))]:
             r = ET.Element("library", attrib={"version": ver})
             log.info("Adding libraries from %s", d)
 

platforms/android/service/readme.txt

@@ -12,7 +12,7 @@ manually using adb tool:
 
     adb install <path-to-OpenCV-sdk>/apk/OpenCV_<version>_Manager_<app_version>_<platform>.apk
 
-Example: OpenCV_3.4.11-dev_Manager_3.49_armeabi-v7a.apk
+Example: OpenCV_3.4.12-dev_Manager_3.49_armeabi-v7a.apk
 
 Use the list of platforms below to determine proper OpenCV Manager package for your device:
 

platforms/maven/opencv-it/pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.opencv</groupId>
         <artifactId>opencv-parent</artifactId>
-        <version>3.4.11</version>
+        <version>3.4.12</version>
     </parent>
     <groupId>org.opencv</groupId>
     <artifactId>opencv-it</artifactId>

platforms/maven/opencv/pom.xml

@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.opencv</groupId>
         <artifactId>opencv-parent</artifactId>
-        <version>3.4.11</version>
+        <version>3.4.12</version>
     </parent>
     <groupId>org.opencv</groupId>
     <artifactId>opencv</artifactId>

platforms/maven/pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>org.opencv</groupId>
     <artifactId>opencv-parent</artifactId>
-    <version>3.4.11</version>
+    <version>3.4.12</version>
     <packaging>pom</packaging>
     <name>OpenCV Parent POM</name>
     <licenses>