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https://github.com/physicsx/ui-example-for-python-ai-applications-with-qt


https://github.com/physicsx/ui-example-for-python-ai-applications-with-qt

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README 

          
# Industrial User Interface Example for Python Visual AI Applications with Qt



In this repository you can find that the User Interface to manage hardware configurations and draw related objects with Qt and QML for Python AI visual applications.



Block Diagram:






Looks like:



![](https://github.com/PhysicsX/UI-Example-for-Python-AI-applications-with-Qt/blob/master/demo.gif)



## Installation



Qt should be installed in the target. Reference Qt version is 5.15.0. 

Tested with ubuntu 18 and 20.



clone the repo



```bash

git clone https://github.com/PhysicsX/UI-Example-for-Python-AI-applications-with-Qt.git

```



If you do not want to build manually, just run.



```bash

$ sudo bash

# cd scripts

# bash buildQt.sh

```

Then skip manual build section.

If you want to build it manually, follow the steps:



```bash

$ sudo bash

# apt update

# apt upgrade -y

```

After upgrading, necessary graphics dependencies is installed to enable eglfs and opengl es.



Some dependencies should be installed also:

```bash

# apt install '.*libxcb.*' libxrender-dev libxi-dev libfontconfig1-dev libudev-dev libgles2-mesa-dev libgl1-mesa-dev gcc git bison python gperf pkg-config make libclang-dev build-essential libssl-dev

```

Then first we simply install qtbase and other necessary modules:



* qtbase-everywhere-src-5.15.0.tar.xz

* qtdeclarative-everywhere-src-5.15.0.tar.xz

* qtquickcontrols-everywhere-src-5.15.0.tar.xz

* qtquickcontrols2-everywhere-src-5.15.0.tar.xz

* qtmultimedia-everywhere-src-5.15.0.tar.xz

* qtsvg-everywhere-src-5.15.0.tar.xz

* qtvirtualkeyboard-everywhere-src-5.15.0.tar.xz



These all can be installed from Qt official website.

```bash

# wget https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtbase-everywhere-src-5.15.0.tar.xz https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtdeclarative-everywhere-src-5.15.0.tar.xz https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtquickcontrols-everywhere-src-5.15.0.tar.xz https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtquickcontrols2-everywhere-src-5.15.0.tar.xz https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtmultimedia-everywhere-src-5.15.0.tar.xz https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtsvg-everywhere-src-5.15.0.tar.xz https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtvirtualkeyboard-everywhere-src-5.15.0.tar.xz https://download.qt.io/archive/qt/5.15/5.15.0/submodules/qtgraphicaleffects-everywhere-src-5.15.0.tar.xz

```



All modules should be built individually in an order.

For qtbase:

```bash

# tar xf qtbase-everywhere-src-5.15.0.tar.xz

# cd qtbase-everywhere-src-5.15.0

# ./configure -opengl es2 -opensource -confirm-license -force-debug-info -openssl-linked -nomake examples -nomake tests -v

# make -j8

# make install

# export QT_SELECT=5

```



After this qmake will be in the /usr/local/Qt-5.15.0/bin/qmake. This path can be changed with -prefix command. Modules which are built with this qmake will be stay in the path.



Configuration parameters should be like this:



```

Configure summary:



Build type: linux-g++ (arm64, CPU features: neon)

Compiler: gcc 7.5.0

Configuration: compile_examples enable_new_dtags force_debug_info largefile neon precompile_header shared shared rpath release c++11 c++14 c++17 c++1z concurrent dbus reduce_exports stl

Build options:

  Mode ................................... release (with debug info)

  Optimize release build for size ........ no

  Building shared libraries .............. yes

  Using C standard ....................... C11

  Using C++ standard ..................... C++17

  Using ccache ........................... no

  Using new DTAGS ........................ yes

  Generating GDB index ................... no

  Relocatable ............................ yes

  Using precompiled headers .............. yes

  Using LTCG ............................. no

  Target compiler supports:

    NEON ................................. yes

  Build parts ............................ libs tools

Qt modules and options:

  Qt Concurrent .......................... yes

  Qt D-Bus ............................... yes

  Qt D-Bus directly linked to libdbus .... no

  Qt Gui ................................. yes

  Qt Network ............................. yes

  Qt Sql ................................. yes

  Qt Testlib ............................. yes

  Qt Widgets ............................. yes

  Qt Xml ................................. yes

Support enabled for:

  Using pkg-config ....................... yes

  udev ................................... yes

  Using system zlib ...................... yes

  Zstandard support ...................... no

Qt Core:

  DoubleConversion ....................... yes

    Using system DoubleConversion ........ no

  GLib ................................... yes

  iconv .................................. no

  ICU .................................... yes

  Built-in copy of the MIME database ..... yes

  Tracing backend ........................ 

  Logging backends:

    journald ............................. no

    syslog ............................... no

    slog2 ................................ no

  PCRE2 .................................. yes

    Using system PCRE2 ................... no

Qt Network:

  getifaddrs() ........................... yes

  IPv6 ifname ............................ yes

  libproxy ............................... no

  Linux AF_NETLINK ....................... yes

  OpenSSL ................................ yes

    Qt directly linked to OpenSSL ........ yes

  OpenSSL 1.1 ............................ yes

  DTLS ................................... yes

  OCSP-stapling .......................... yes

  SCTP ................................... no

  Use system proxies ..................... yes

  GSSAPI ................................. no

Qt Gui:

  Accessibility .......................... yes

  FreeType ............................... yes

    Using system FreeType ................ yes

  HarfBuzz ............................... yes

    Using system HarfBuzz ................ yes

  Fontconfig ............................. yes

  Image formats:

    GIF .................................. yes

    ICO .................................. yes

    JPEG ................................. yes

      Using system libjpeg ............... no

    PNG .................................. yes

      Using system libpng ................ yes

  Text formats:

    HtmlParser ........................... yes

    CssParser ............................ yes

    OdfWriter ............................ yes

    MarkdownReader ....................... yes

      Using system libmd4c ............... no

    MarkdownWriter ....................... yes

  EGL .................................... yes

  OpenVG ................................. no

  OpenGL:

    Desktop OpenGL ....................... no

    OpenGL ES 2.0 ........................ yes

    OpenGL ES 3.0 ........................ yes

    OpenGL ES 3.1 ........................ yes

    OpenGL ES 3.2 ........................ yes

  Vulkan ................................. no

  Session Management ..................... yes

Features used by QPA backends:

  evdev .................................. yes

  libinput ............................... no

  INTEGRITY HID .......................... no

  mtdev .................................. no

  tslib .................................. no

  xkbcommon .............................. no

  X11 specific:

    XLib ................................. yes

    XCB Xlib ............................. yes

    EGL on X11 ........................... yes

    xkbcommon-x11 ........................ no

QPA backends:

  DirectFB ............................... no

  EGLFS .................................. yes

  EGLFS details:

    EGLFS OpenWFD ........................ no

    EGLFS i.Mx6 .......................... no

    EGLFS i.Mx6 Wayland .................. no

    EGLFS RCAR ........................... no

    EGLFS EGLDevice ...................... yes

    EGLFS GBM ............................ no

    EGLFS VSP2 ........................... no

    EGLFS Mali ........................... no

    EGLFS Raspberry Pi ................... no

    EGLFS X11 ............................ yes

  LinuxFB ................................ yes

  VNC .................................... yes

Qt Sql:

  SQL item models ........................ yes

Qt Widgets:

  GTK+ ................................... no

  Styles ................................. Fusion Windows

Qt PrintSupport:

  CUPS ................................... no

Qt Sql Drivers:

  DB2 (IBM) .............................. no

  InterBase .............................. no

  MySql .................................. no

  OCI (Oracle) ........................... no

  ODBC ................................... no

  PostgreSQL ............................. no

  SQLite2 ................................ no

  SQLite ................................. yes

    Using system provided SQLite ......... no

  TDS (Sybase) ........................... no

Qt Testlib:

  Tester for item models ................. yes



Note: Also available for Linux: linux-clang linux-icc



Note: When linking against OpenSSL, you can override the default

library names through OPENSSL_LIBS.

For example:

    OPENSSL_LIBS='-L/opt/ssl/lib -lssl -lcrypto' ./configure -openssl-linked



Qt is now configured for building. Just run 'make'.

Once everything is built, you must run 'make install'.

Qt will be installed into '/usr/local/Qt-5.15.0'.



Prior to reconfiguration, make sure you remove any leftovers from

the previous build.



```



Now we can install submodules.

For qtdeclarative:

```bash

# cd ..

# tar xf qtdeclarative-everywhere-src-5.15.0.tar.xz

# cd qtdeclarative-everywhere-src-5.15.0

# /usr/local/QtEpilog/bin/qmake

# make -j8

# make install

```

For qtquickcontrols:

```bash

# cd ..

# tar xf qtquickcontrols-everywhere-src-5.15.0.tar.xz

# cd qtquickcontrols-everywhere-src-5.15.0

# /usr/local/Qt-5.15.0/bin/qmake

# make -j8

# make install

```

For qtquickcontrols2:

```bash

# cd ..

# tar xf qtquickcontrols2-everywhere-src-5.15.0.tar.xz

# cd qtquickcontrols2-everywhere-src-5.15.0

# /usr/local/Qt-5.15.0/bin/qmake

# make -j8

# make install

```

For qtmultimedia:

```bash

# cd ..

# tar xf qtmultimedia-everywhere-src-5.15.0.tar.xz

# cd qtmultimedia-everywhere-src-5.15.0

# /usr/local/Qt-5.15.0/bin/qmake

# make -j8

# make install

```

For qtsvg: ( this one is needed for qtvirtualkeyboard)

```bash

# cd ..

# tar xf qtsvg-everywhere-src-5.15.0.tar.xz

# cd qtsvg-everywhere-src-5.15.0

# /usr/local/Qt-5.15.0/bin/qmake

# make -j8

# make install

```

For qtVirtualKeyboard:

```bash

# cd ..

# tar xf qtvirtualkeyboard-everywhere-src-5.15.0.tar.xz

# cd qtvirtualkeyboard-everywhere-src-5.15.0

# /usr/local/Qt-5.15.0/bin/qmake

# make -j8

# make install

```

For qtGraphicalEffects:

```bash

# cd ..

# tar xf qtgraphicaleffects-everywhere-src-5.15.0.tar.xz

# cd qtgraphicaleffects-everywhere-src-5.15.0

# /usr/local/Qt-5.15.0/bin/qmake

# make -j8

# make install

```



## How to test the application



Example is tested in jetson nano/nx.

Opencv should be installed/compiled with gstreamer option enabled.



![](https://www.uctronics.com/media/catalog/product/cache/5d1f08909b337dbf64263212361f58e9/i/m/imx219_ff_ir_nano_4.jpg)



Now you are ready to run the app. Picamera should be connected. Be sure to type "sudo bash".

```

# cd scripts

# bash run.sh

```



Then for the facedetection application:

```bash

# cd scripts

# python3 faceDetectionShm.py

```



### Citation



Ulas Dikme (2021). *Industrial user interface software design for visual

python AI applications using embedded linux based systems*. Journal of Applied and Physical Sciences, 7(1), 1-10. [10.20474/japs-7.1](https://doi.org/10.20474/japs-7.1)