Skip to main content

Read and write Netpbm files

Project description

Netpbmfile is a Python library to read and write image files in the Netpbm format as specified at http://netpbm.sourceforge.net/doc/.

The following Netpbm and Portable FloatMap formats are supported:

  • PBM (bi-level)
  • PGM (grayscale)
  • PPM (color)
  • PAM (arbitrary)
  • XV thumbnail (RGB332, read-only)
  • PF (float32 RGB, read-only)
  • Pf (float32 grayscale, read-only)

No gamma correction is performed. Only one image per file is supported.

Author:Christoph Gohlke
Organization:Laboratory for Fluorescence Dynamics, University of California, Irvine
License:BSD 3-Clause
Version:2020.10.18

Requirements

Revisions

2020.10.18
Disallow comments after last value in PNM headers.
2020.9.18
Remove support for Python 3.6 (NEP 29). Support os.PathLike file names.
2020.1.1
Fix reading tightly packed P1 format and ASCII data with inline comments. Remove support for Python 2.7 and 3.5. Update copyright.
2018.10.18
Move netpbmfile.py into netpbmfile package.
2018.02.18
Support Portable FloatMaps. Style fixes.
2016.02.24
Use ‘fromdata’ classmethod to initialize from data. Support ‘with’ statement. Scale RGB images to maxval for display. Make keyword arguments explicit. Support numpy 1.10.

Examples

Save a numpy array to a Netpbm file in grayscale format:

>>> data = numpy.array([[0, 1], [65534, 65535]], dtype='uint16')
>>> imwrite('_tmp.pgm', data)

Read the image data from a Netpbm file as numpy array:

>>> image = imread('_tmp.pgm')
>>> assert numpy.all(image == data)

Access meta and image data in a Netpbm file:

>>> with NetpbmFile('_tmp.pgm') as pgm:
...     pgm.axes
...     pgm.shape
...     pgm.dtype
...     pgm.maxval
...     pgm.magicnum
...     image = pgm.asarray()
'YX'
(2, 2)
dtype('>u2')
65535
b'P5'

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

netpbmfile-2020.10.18.tar.gz (8.5 kB view hashes)

Uploaded source

Built Distribution

netpbmfile-2020.10.18-py3-none-any.whl (9.6 kB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page