Add a Qt MRZ example

examples/qt_mrz/.gitignore

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+.qt_for_python
+build

examples/qt_mrz/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.5)
+
+project(MRZRecognizer VERSION 0.1 LANGUAGES CXX)
+
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+if (CMAKE_HOST_WIN32)
+    link_directories("${PROJECT_SOURCE_DIR}/platform/windows/lib/") 
+elseif(CMAKE_HOST_UNIX)
+    link_directories("${PROJECT_SOURCE_DIR}/platform/linux/")
+endif()
+include_directories("${PROJECT_SOURCE_DIR}/include/")
+
+find_package(Qt5 COMPONENTS Widgets REQUIRED)
+find_package(Qt5MultimediaWidgets REQUIRED)
+
+set(PROJECT_SOURCES
+        main.cpp
+        mainwindow.cpp
+        mainwindow.h
+        mainwindow.ui
+        myvideosurface.h
+        myvideosurface.cpp
+        work.h
+        work.cpp
+        mrzinfo.h
+        mrzinfo.cpp
+)
+
+add_executable(${PROJECT_NAME} ${PROJECT_SOURCES})
+
+if (CMAKE_HOST_WIN32)
+    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Widgets Qt5::MultimediaWidgets "DynamsoftLabelRecognizerx64")    
+elseif(CMAKE_HOST_UNIX)
+    target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Widgets Qt5::MultimediaWidgets "DynamsoftLabelRecognizer")
+endif()
+
+# Copy DLLs
+if(CMAKE_HOST_WIN32)
+    add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD 
+        COMMAND ${CMAKE_COMMAND} -E copy_directory
+        "${PROJECT_SOURCE_DIR}/platform/windows/bin/"      
+        $<TARGET_FILE_DIR:${PROJECT_NAME}>)
+endif()
+
+# Copy template
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD 
+        COMMAND ${CMAKE_COMMAND} -E copy_directory
+        "${PROJECT_SOURCE_DIR}/template/"      
+        $<TARGET_FILE_DIR:${PROJECT_NAME}>)
+
+# Copy model files
+add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD 
+        COMMAND ${CMAKE_COMMAND} -E copy_directory
+        "${PROJECT_SOURCE_DIR}/model"      
+        $<TARGET_FILE_DIR:${PROJECT_NAME}>/model)

examples/qt_mrz/README.md

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+# Qt Desktop Passport Scanner
+A desktop passport scanner app built with [Dynamsoft OCR SDK](https://www.dynamsoft.com/label-recognition/overview/), [Qt](https://www.qt.io/) and a USB web camera.
+
+## Trial License
+Get a [trial license](https://www.dynamsoft.com/customer/license/trialLicense/?product=dcv&package=cross-platform) to activate passport scanning functions.
+
+![sdk license key](https://www.dynamsoft.com/blog/wp-content/uploads/2021/09/passport-scanner-license-key.png)
+
+## Download
+- Qt
+  - [Windows](https://www.qt.io/download)
+  - Linux
+
+    ```bash
+    sudo apt-get install qt5-default qtmultimedia5-dev
+    ```
+
+- [Dynamsoft Label Recognizer 2.0 for Windows and Linux](https://www.dynamsoft.com/barcode-reader/downloads/)
+
+## Build and Run
+
+![Qt desktop passport scanner](https://www.dynamsoft.com/blog/wp-content/uploads/2021/09/passport-scanner-qt-mrz.png)
+
+**Windows**
+
+Add `Qt/5.12.11/mingw73_64/bin` and `Qt/Tools/mingw73_64/bin` to system path.
+
+Run the following commands:
+
+```bash
+mkdir build
+cd build
+cmake -G "MinGW Makefiles" ..
+cmake --build .
+MRZRecognizer.exe
+```
+
+**Linux**
+
+```bash
+mkdir build
+cd build
+cmake ..
+cmake --build .
+./MRZRecognizer
+```
+
+## Blog
+[Building Desktop Passport Scanner with Qt and USB Camera](https://www.dynamsoft.com/codepool/passport-scanner-qt-desktop-camera.html)