Bildverarbeitung

This repository follows Bildverarbeitung FS2023 for Geomatik bachelor students at ETH Zurich. Lectures and recordings can be found in Moodle.

Contact

If you have any questions, please let us know:

• Binbin Xiang {[email protected]}
• Shengyu Huang {[email protected]}
• Rodrigo Caye Daudt {[email protected]}

Dependencies

This code has been test on

• Python 3.7 and Python 3.8, MacOS and Linux

As the first step, please git clone this repository to your local machine by running:

git clone https://github.com/prs-eth/Bildverarbeitung.git

Then, please run the following commands to create virtual environment and install dependencies:

virtualenv vildverarbeitung
source vildverarbeitung/bin/activate
pip install numpy PyQt5 opencv_python scikit-image

Next, please install QT Designer

• For windows and Linux user, you can install by running:

pip install PyQt5_tools

• For MacOS user, please choose 5.12.x Offline Installers and install from here

Now you can open the GUI by running:

python main.py

and you will see sth like:

Known issues

• If you run into errors like

  QObject::moveToThread: Current thread (0x2ab1aa0) is not the object's thread (0x312d4d0).
  Cannot move to target thread (0x2ab1aa0)
  
  qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/scratch2/shengyu/predator/lib/python3.8/site-packages/cv2/qt/plugins" even though it was found.
  This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
  
  Available platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl.
  
  Aborted
  

  Please uninstall opencv_python and instead opencv_python_headless instead:

  pip uninstall opencv_python
  pip install opencv-python-headless
  

  If this also doesn't work for you, please try:

  pip uninstall opencv_python
  pip install opencv-contrib-python
  

• If you have problems with installing libs. on MacOS system, please first check if you can successfully install scipy, if not, you might have to install gcc first by running:

  brew install gcc
  

• If you are a Mac user and have problems with install PyQt5 via pip install, please consider using conda install instead, you can still use pip install under an anaconda environment by first running:

conda install pip

Instructions

This GUI is built on QT, to make any modifications, please first open qt designer/creator:

• For linux and windows user, please run:

pyqt5-tools designer

• For MacOS user, please just open QT Creator after installation.

Then please open assets/gui.ui and make modifications.

Afterwards, you can first save the modifications and run

pyuic5 -o libs/gui.py assets/gui.ui

to update associated python files. You will see the new GUI by running

python main.py