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Read images to numpy arrays
C++ Python

README.rst

mahotas-imread: Read Image Files

Mahotas-imread is a simple module with a small number of functions:

imread
Reads an image file
imread_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.

Online documentation

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 = {http://dx.doi.org/10.5334/jors.ac},
    month = {July},
    volume = {1}
}

Dependencies

To compile on debian/ubuntu:

sudo apt-get install libpng12-dev libtiff4-dev libwebp-dev
sudo apt-get install xcftools

To compile on Mac:

sudo port install libpng tiff webp

Either way, you can then compile with:

python setup.py build

and install with:

python setup.py install

On Windows, you can also just download a pre-built package from C. Gohlke's repository

Links & Contacts

Documentation: http://imread.readthedocs.org/

Issue Tracker: `github imread issues <https://github.com/luispedro/imread`__

Mailing List: Use the pythonvision mailing list for questions, bug submissions, etc.

Main Author & Maintainer: Luis Pedro Coelho (follow on twitter or github).

Travis Build Status

https://travis-ci.org/luispedro/imread.png

Python versions 2.6, 2.7, 3.3, and 3.4 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.

History

Version 0.5.1 (2014-11-06)

  • Improve tests to work after installation
  • Fix compilation in MSVC (patch by Christoph Gohlke)

Version 0.5 (2014-10-16)

  • Add magic-number based format auto-detection
  • Auto detect whether webp is installed
  • Fix WebP reading (update to newer API)

Version 0.4 (2014-07-21)

  • Add configuration for TIFF saving
  • Correctly save 16 bit PNG images
  • Better error messages for JPEG

Version 0.3.2 (2013-10-06)

  • 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

Version 0.3.1 (2013-06-20)

  • Fix possible crash on error with TIFF
  • Fix compilation on Windows (reported by Volker Hilsenstein)
  • Make it easy to compile without WebP

Version 0.3.0 (2013-07-29)

  • 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

Version 0.2.6 (2013-06-19)

  • Fix hard crash when saving with non-existing file type
  • Fix compilation on MacOS (patch by Alexander Bohn)
  • Add verbose argument to tests.run()
  • Better error when attempting to save floating point images

Version 0.2.5 (2012-10-29)

  • 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

Version 0.2.4 (2012-06-26)

  • Add lzw.cpp to source distribution
  • Support saving 16-bit TIFF
  • Better Mac OS support (patch from Alexander Bohn)

Version 0.2.3 (2012-06-8)

  • Fix imread_multi

Version 0.2.2 (2012-06-5)

  • Add formatstr 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)
  • Fix writing of non-contiguous images (at least PNG was affected)

Version 0.2.1 (2012-02-11)

  • Add missing files to distribution

Version 0.2 (2012-03-19)

  • 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

Version 0.1 (2012-02-28)

  • Support for PNG
  • Support for TIFF
  • Support for JPEG
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