IO with images and numpy arrays.
Mahotas-imread is a simple module with a small number of functions:
imread: Reads an image fileimread_multi: Reads an image file with multiple images. Currently, TIFF and STK (a TIFF sub-based format) support this function.imsave: Writes an image file
Example (which uses mahotas for Gaussian filtering):
from imread import imread, imsave
from mahotas import gaussian_filter
lena = imread('lena.jpeg')
lena = gaussian_filter(lena.astype(float), 4.)
imsave('lena-filtered.jpeg', lena)This grew out of frustration at current image loading solutions in Python, in either my packages [mahotas] or packages from others [scikit-image, for example].
The relationship with numpy is very contained and this could be easily repurposed to load images in other frameworks, even other programming languages.
Python versions 2.6, 2.7, 3.3+ are officially supported.
Python 3.2 (and earlier versions in the Python 3 series) are officially not supported. Patches will be accepted if they do not mess up anything else, but bug reports will not be considered as very high priority.
::: {#Citation} If you use imread on a published publication, please cite the main mahotas paper (imread is a spin-off of mahotas): :::
Luis Pedro Coelho Mahotas: Open source software for scriptable computer vision in Journal of Open Research Software, vol 1, 2013. [DOI]
In Bibtex format:
@article{mahotas,
author = {Luis Pedro Coelho},
title = {Mahotas: Open source software for scriptable computer vision},
journal = {Journal of Open Research Software},
year = {2013},
doi = {https://dx.doi.org/10.5334/jors.ac},
month = {July},
volume = {1}
}
The easiest environment to install mahotas-imread is anaconda, through conda-forge. Just use:
conda config --add channels conda-forge
conda install imreadTo compile on debian/ubuntu:
sudo apt-get install libpng12-dev libtiff4-dev libwebp-dev
sudo apt-get install xcftoolsTo compile on Mac:
sudo port install libpng tiff webpEither way, you can then compile with:
python setup.py buildand install with:
python setup.py installOn Windows, you can also just download a pre-built package from C. Gohlke's repository
On nix, you can use:
nix-env -iA nixpkgs.python3Packages.imread
or use the pkgs.python3Packages.imread object in your *.nix files.
- Documentation: https://imread.readthedocs.io/
- Issue Tracker: github imread issues
- Mailing List: Use the pythonvision mailing list for questions, bug submissions, etc.
- Main Author & Maintainer: Luis Pedro Coelho (follow on twitter or github).
- Fix build issue (#43, patch by @carlosal1015)
- Add missing header files to distribution
- Add missing test data to distribution
- Fix several memory access bugs in parsers (reported by Robert Scott)
- Fix 16-bit RGB/RGBA TIFF write (patch by Tomi Aarnio)
- Add support for reading ImageJ ROIs
- Support pathlib paths as function arguments
- Fix 16 bit PNG write support (patch by Tomi Aarnio)
- Add [supports_format]{.title-ref} function
- Make png compression level tunable when calling imsave
- Add imsave_multi
- Add partial support for reading PNG files in Gray+alpha format
- Improve tests to work after installation
- Fix compilation in MSVC (patch by Christoph Gohlke)
- Add magic-number based format auto-detection
- Auto detect whether webp is installed
- Fix WebP reading (update to newer API)
- Add configuration for TIFF saving
- Correctly save 16 bit PNG images
- Better error messages for JPEG
- Added imload*/imwrite synonyms as suggested by Thouis (Ray) Jones
- Options framework
- Allow user to specify JPEG quality when saving
- Fix loading of 16 bit PNG images
- Fix possible crash on error with TIFF
- Fix compilation on Windows (reported by Volker Hilsenstein)
- Make it easy to compile without WebP
- Support for reading from in-memory blobs
- Support for reading & writing TIFF metadata
- Add PHOTOMETRIC tag to TIFF (reported by Volker Hilsenstein)
- Support writing RGB TIFFs
- Fix hard crash when saving with non-existing file type
- Fix compilation on MacOS (patch by Alexander Bohn)
- Add
verboseargument to tests.run() - Better error when attempting to save floating point images
- Correctly accept uppercase extensions
- Python 3 support (patch by Christoph Gohlke [pull request 8 on github])
- Read 1-Bit PNGs
- Read simple BMPs (compression and many bit types not supported)
- More complete debug mode (export DEBUG=2 when building), more checks
- Add lzw.cpp to source distribution
- Support saving 16-bit TIFF
- Better Mac OS support (patch from Alexander Bohn)
- Fix imread_multi
- Add [formatstr]{.title-ref} argument to imread
- Open files in binary mode on Windows (patch by Christoph Gohlke)
- Read-only support for LSM files
- Read-only support for XCF files (through [xcf2png]{.title-ref})
- Fix writing of non-contiguous images (at least PNG was affected)
- Add missing files to distribution
- Compile on MSVC++ (Patches by Christoph Gohlke)
- Support for WebP
- Support for 1-bit TIFFs
- Better error message
- Support for multi-page TIFF reading
- Experimental read-only support for STK files
- Support for PNG
- Support for TIFF
- Support for JPEG
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