A Python wrapper for libjpeg, with a focus on use as a plugin for for pylibjpeg

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  • License: GNU General Public License v3 (GPLv3) (GPL V3.0)
  • Author: scaramallion
  • Tags dicom, pydicom, python, jpg, jpeg, jpg-ls, jpeg-ls, libjpeg, pylibjpeg
  • Requires: Python >=3.7
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Project description

Build Status codecov PyPI version Python versions

pylibjpeg-libjpeg

A Python 3.7+ wrapper for Thomas Richter's libjpeg, with a focus on use as a plugin for pylibjpeg.

Linux, MacOS and Windows are all supported.

Installation

Dependencies

NumPy

Installing the current release

pip install pylibjpeg-libjpeg

Installing the development version

Make sure Python and Git are installed. For Windows, you also need to install Microsoft's C++ Build Tools.

git clone --recurse-submodules https://github.com/pydicom/pylibjpeg-libjpeg
python -m pip install pylibjpeg-libjpeg

Supported JPEG Formats

Decoding

ISO/IEC Standard ITU Equivalent JPEG Format
10918 T.81 JPEG
14495 T.87 JPEG-LS
18477 JPEG XT

Encoding

Encoding of JPEG images is not currently supported

Supported Transfer Syntaxes

Decoding

UID Description
1.2.840.10008.1.2.4.50 JPEG Baseline (Process 1)
1.2.840.10008.1.2.4.51 JPEG Extended (Process 2 and 4)
1.2.840.10008.1.2.4.57 JPEG Lossless, Non-Hierarchical (Process 14)
1.2.840.10008.1.2.4.70 JPEG Lossless, Non-Hierarchical, First-Order Prediction (Process 14 [Selection Value 1])
1.2.840.10008.1.2.4.80 JPEG-LS Lossless
1.2.840.10008.1.2.4.81 JPEG-LS Lossy (Near-Lossless) Image Compression

Usage

With pylibjpeg and pydicom

from pydicom import dcmread
from pydicom.data import get_testdata_file

ds = dcmread(get_testdata_file('JPEG-LL.dcm'))
arr = ds.pixel_array

Standalone JPEG decoding

You can also decode JPEG images to a numpy ndarray:

from libjpeg import decode

with open('filename.jpg', 'rb') as f:
    # Returns a numpy array
    arr = decode(f.read())

# Or simply...
arr = decode('filename.jpg')

Project details

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  • License: GNU General Public License v3 (GPLv3) (GPL V3.0)
  • Author: scaramallion
  • Tags dicom, pydicom, python, jpg, jpeg, jpg-ls, jpeg-ls, libjpeg, pylibjpeg
  • Requires: Python >=3.7
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2.3.0

2.2.0

2.1.1 yanked

Reason this release was yanked:

Use 2.2.0 for numpy v2.0

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2.0.1

2.0.0

1.3.4

1.3.3

This version

1.3.2

1.3.1

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