Small utility to make simple drawings in Jupyter notebooks with ipycanvas and ipywidgets. Useful for getting quick user input in research prototypes, e.g., for masking or annotation.

pip install ipycanvas-drawing

Create a simple drawing interface. Check out the notebook in examples for a more complete example.

from ipycanvas_drawing import DrawingWidget

# Create a drawing widget
# You can set other setup parameters: background, alpha, default_style, default_radius
drawing_widget = DrawingWidget(width=500, height=500) 
# Show the drawing widget
drawing_widget.show()

# Get the image data as a numpy array
image_output = drawing_widget.get_image_data()

• Visual Studio Code's Jupyter environment doesn't like ipycanvas's sync_image_data functionality. Workaround: open notebooks in Jupyter lab or Notebook in the browser.
• ipycanvas does not work in Google Colab. Workaround: use the Binder to quickly try the tool without needing to install it on your own machine.

Based on the hand drawing example provided by @martinRenou, but adds some additional functionality like adding squares and ellipses and a 1-step undo.