ome-zarr 0.0.9.dev0

Implementation of images in Zarr files.

Experimental support for multi-resolution images stored in Zarr filesets, according to the OME zarr spec.

Features

• Use as a image reader plugin for napari. The napari plugin was generated with Cookiecutter along with @napari’s cookiecutter-napari-plugin template.

• Simple command-line to read and download conforming Zarr filesets.

• Helper methods for parsing related metadata.

Installation

Install the latest release of ome-zarr from PyPI:

pip install ome-zarr

Install developer mode to run from your current branch:

git clone [e-mail]:ome/ome-zarr-py.git
cd ome-zarr-py
pip install -e .

Usage

Open Zarr filesets containing images with associated OME metadata. The examples below use the image at http://idr.openmicroscopy.org/webclient/?show=image-6001240.

All examples can be made more or less verbose by passing -v or -q one or more times:

# ome_zarr -vvv ...

info

Use the ome_zarr command to interrogate Zarr datasets:

# Remote data
$ ome_zarr info https://s3.embassy.ebi.ac.uk/idr/zarr/v0.1/6001240.zarr/

# Local data (after downloading as below)
$ ome_zarr info 6001240.zarr/

download

To download all the resolutions and metadata for an image:

# creates local 6001240.zarr/
$ ome_zarr download https://s3.embassy.ebi.ac.uk/idr/zarr/v0.1/6001240.zarr/

# Specify output directory
$ ome_zarr download https://s3.embassy.ebi.ac.uk/idr/zarr/v0.1/6001240.zarr/ --output image_dir

napari plugin

Napari will use ome-zarr to open images that the plugin recognises as ome-zarr. The image metadata from OMERO will be used to set channel names and rendering settings in napari:

$ napari 'https://s3.embassy.ebi.ac.uk/idr/zarr/v0.1/6001240.zarr/'

# Also works with local files
$ napari 6001240.zarr

OR in python:

import napari
with napari.gui_qt():
    viewer = napari.Viewer()
    viewer.open('https://s3.embassy.ebi.ac.uk/idr/zarr/v0.1/6001240.zarr/')

If single zarray is passed to the plugin, it will be opened without the use of the metadata:

$ napari '/tmp/6001240.zarr/0'

Release process

This repository uses bump2version to manage version numbers. To tag a release run:

$ bumpversion release

This will remove the .dev0 suffix from the current version, commit, and tag the release.

To switch back to a development version run:

$ bumpversion --no-tag [major|minor|patch]

specifying major, minor or patch depending on whether the development branch will be a major, minor or patch release. This will also add the .dev0 suffix.

Remember to git push all commits and tags.

License

Distributed under the terms of the BSD license, “ome-zarr-py” is free and open source software