liffile 2025.2.5

Read Leica image files (LIF, LOF, and XLIF)

Liffile is a Python library to read image and metadata from Leica image file formats: LIF (Leica Image File), LOF (Leica Object File), and XLIF (XML Leica Image File).

These files are written by LAS X software to store collections of images and metadata from microscopy experiments.

Author:

Christoph Gohlke

License:

BSD 3-Clause

Version:

2025.2.5

DOI:

10.5281/zenodo.14740657

Quickstart

Install the liffile package and all dependencies from the Python Package Index:

python -m pip install -U liffile[all]

See Examples for using the programming interface.

Source code and support are available on GitHub.

Requirements

This revision was tested with the following requirements and dependencies (other versions may work):

• CPython 3.10.11, 3.11.9, 3.12.9, 3.13.2 64-bit

• NumPy 2.2.2

• Imagecodecs 2024.12.30 (required for decoding TIFF, JPEG, PNG, and BMP)

• Xarray 2025.1.2 (recommended)

• Matplotlib 3.10.0 (optional)

• Tifffile 2025.1.10 (optional)

Revisions

2025.2.5

• Support XLIF files.

• Revise LifMemoryBlock (breaking).

• Replace LifImage.is_lof property with format (breaking).

• Require imagecodecs for decoding TIF, JPEG, PNG, and BMP frames.

2025.2.2

• Add LifFlimImage class.

• Derive LifImage and LifFlimImage from LifImageABC.

• Rename LifImage.guid property to uuid (breaking).

• Add LifFile.uuid property.

2025.1.31

• Support LOF files.

• Make LifFile.xml_header a function (breaking).

2025.1.30

• Remove LifFile.flim_rawdata (breaking).

• Add index, guid, and xml_element_smd properties to LifImage.

2025.1.26

• Fix image coordinate values.

• Prompt for file name if main is called without arguments.

2025.1.25

• Initial alpha release.

Notes

Leica Microsystems GmbH is a manufacturer of microscopes and scientific instruments for the analysis of micro and nanostructures.

This library is in its early stages of development. It is not feature-complete. Large, backwards-incompatible changes may occur between revisions.

Specifically, the following features are currently not supported: related Leica file formats (XLEF, XLLF, LIFEXT), image mosaics and pyramids, partial image reads, reading non-image data like FLIM/TCSPC, heterogeneous channel data types, discontiguous storage, and bit increments.

The library has been tested with a limited number of version 2 files only.

The Leica Image File format is documented at:

• Leica Image File Formats - LIF, XLEF, XLLF, LOF. Version 3.2. Leica Microsystems GmbH. 21 September 2016.

• Annotations to Leica Image File Formats for LAS X Version 3.x. Version 1.4. Leica Microsystems GmbH. 24 August 2016.

• TSC SP8 FALCON File Format Description. LAS X Version 3.5.0.

Other implementations for reading Leica LIF files are readlif and Bio-Formats .

Examples

Read a FLIM lifetime image and metadata from a LIF file:

>>> with LifFile('tests/data/FLIM.lif') as lif:
...     for image in lif.series:
...         name = image.name
...     image = lif.series['Fast Flim']
...     assert image.shape == (1024, 1024)
...     assert image.dims == ('Y', 'X')
...     lifetimes = image.asxarray()
...
>>> lifetimes
<xarray.DataArray 'Fast Flim' (Y: 1024, X: 1024)> Size: 2MB
array([[...]],
      shape=(1024, 1024), dtype=float16)
    Coordinates:
      * Y        (Y) float64... 0.0005564
      * X        (X) float64... 0.0005564
Attributes...
    path:           FLIM_testdata.lif/sample1_slice1/FLIM Compressed/Fast Flim
    F16:            {'Name': 'F16',...
    TileScanInfo:   {'Tile': {'FieldX': 0,...
    ViewerScaling:  {'ChannelScalingInfo': {...

View the image and metadata in a LIF file from the console:

$ python -m liffile tests/data/FLIM.lif