Drizzlib

From this page you can download the drizzling software library ,``drizzlib``, which reprojects data from HEALPix to local WCS FITS format. The library is available in IDL and Python languages.

The drizzling library uses a strategy where the surface of pixel intersection is computed as presented in Appendix A of Paradis et al., 2012, A&A, 543, 103. This method allows fast ingestion and guarantees the photometric accuracy of the transformation with minimal data loss during the transformation from HEALPix to local WCS FITS.

NEW CADE now offers a web interface to the drizzling software library called “drizzweb”. This allows the user to reproject data from HEALPix to local WCS FITS format using CADE's computing resources. The ``drizzweb`` page is http://drizzweb.irap.omp.eu/

• Jean-Philippe Bernard (IRAP)
• Nathalie Baby (IRAP)
• Caroline Bot (CDS)
• Laurent Cambrésy (CDS)
• Déborah Paradis (IRAP)
• Alexandre Sauvé (IRAP)

drizzlib_v08_15_beta.zip

• Antoine Goutenoir (IRAP)
• Déborah Paradis (IRAP)
• Jean-Michel Glorian (IRAP)
• Gabriel Foënard (IRAP)
• Nathanael Jourdane (IRAP)
• Anaïs Amato (IRAP)

The source tree is available on gitlab.

The python package itself can be downloaded an installed via pip :

pip install drizzlib

Or you can directly grab a tarball here :

• NEW drizzlib-2.0.tar.gz (2019-07-04) for Python >= 3.6
• drizzlib-1.2.6.3.tar.gz (2018-12-07) for Python >= 2.7

There are detailed instructions and troubleshooting tips in the README, which you should read.

Here's a simple usage example, that reads my_healpix.fits and extracts a subset of its data as described by the header in wcs_config.fits, and writes the result into my_wcs.fits :

from drizzlib import healpix2wcs
 
healpix2wcs(
    'my_healpix.fits',
    header='wcs_config.fits',
    output='my_wcs.fits'
)

First, install the system dependencies :

Debian / Ubuntu

apt-get install python-dev pkg-config libfreetype* gfortran libopenblas-dev liblapack-dev

pip install drizzlib

It may complain about numpy. Install it, and try again.

Uncompress the tarball, move into it.

Then, install the python dependencies using pip :

pip install --upgrade setuptools
pip install -r requirements.txt

Finally, install drizzlib itself :

python setup.py install

Only for python 2.7

• drizzlib-1.2.6.2.tar.gz (2018-11-16)
• drizzlib-1.2.6.1.tar.gz (2018-10-16)
• drizzlib-1.2.5.tar.gz (2018-05-25)
• drizzlib-1.2.2.tar.gz (2017-05-17)
• drizzlib-1.0.1.tar.gz (2015-12-18)