napari 0.2.4

We’re happy to announce the release of napari 0.2.4! napari is a fast, interactive, multi-dimensional image viewer for Python. It’s designed for browsing, annotating, and analyzing large multi-dimensional images. It’s built on top of Qt (for the GUI), vispy (for performant GPU-based rendering), and the scientific Python stack (numpy, scipy).

For more information, examples, and documentation, please visit our website:

New Features

  • Add gamma slider (#610)


  • Make _on_data_change only get called once when ndisplay changes (#629)

  • fix undefined variables, remove unused imports (#633)

  • Raise informative warning when no Qt loop is detected (#642)

Bug Fixes

  • gui_qt: Ipython command is %gui qt in docs (#636)

  • Calculate minimum thumbnail side length so they are never zero width (#643)


  • napari.Viewer.add_multichannel was removed. Use napari.Viewer.add_image(..., channel_axis=num) (#619)

4 authors added to this release (alphabetical)

4 reviewers added to this release (alphabetical)