LabelImg
LabelImg is a graphical image annotation tool.
It is written in Python and uses Qt for its graphical interface.
Annotations are saved as XML files in PASCAL VOC format, the format used by ImageNet.
Watch a demo video by author tzutalin
Installation
Download prebuilt binaries
- Windows & Linux
- OS X. Binaries for OS X are not yet available. Help would be appreciated. At present, it must be built from source.
Build from source
Linux/Ubuntu/Mac requires at least Python 2.6 and has been tested with PyQt 4.8.
Ubuntu Linux
sudo apt-get install pyqt4-dev-tools sudo pip install lxml make all ./labelImg.py ./labelImg.py [IMAGE_PATH] [PRE-DEFINED CLASS FILE]
OS X
brew install qt qt4 brew install libxml2 make all ./labelImg.py ./labelImg.py [IMAGE_PATH] [PRE-DEFINED CLASS FILE]
Windows
Download and setup Python 2.6 or later, PyQt4 and install lxml.
Open cmd and go to labelImg directory
pyrcc4 -o resources.py resources.qrc python labelImg.py python labelImg.py [IMAGE_PATH] [PRE-DEFINED CLASS FILE]
Get from PyPI
pip install labelImg labelImg labelImg [IMAGE_PATH] [PRE-DEFINED CLASS FILE]
I tested pip on Ubuntu14.04 and 16.04. However, I didn't test pip on MacOS and windows
Usage
Steps
- Build and launch using the instructions above.
- Click 'Change default saved annotation folder' in Menu/File
- Click 'Open Dir'
- Click 'Create RectBox'
- Click and release left mouse to select a region to annotate the rect box
- You can use right mouse to drag the rect box to copy or move it
The annotation will be saved to the folder you specify.
You can refer to the below hotkeys to speed up your workflow.
Create pre-defined classes
You can edit the data/predefined_classes.txt to load pre-defined classes
Hotkeys
Ctrl + u | Load all of the images from a directory |
Ctrl + r | Change the default annotation target dir |
Ctrl + s | Save |
Ctrl + d | Copy the current label and rect box |
Space | Flag the current image as verified |
w | Create a rect box |
d | Next image |
a | Previous image |
del | Delete the selected rect box |
Ctrl++ | Zoom in |
Ctrl-- | Zoom out |
↑→↓← | Keyboard arrows to move selected rect box |
How to contribute
Send a pull request
License
Related
- ImageNet Utils to download image, create a label text for machine learning, etc