Change log

2.0.1

Bug fixes

azul process

  • Sometimes a Python error was raised when multiple observations of the same field had to be stacked.

2.0.0

Breaking changes

  • The following commands are deprecated:

    • find (merged into retrieve),

    • crop (partially replaced with cutout retrieval, to be fully replaced later),

    • assemble (previously experimental, replaced with arrange),

    • tune (previously experimental, to be merged into process later).

azul retrieve

  • Data provider sas was renamed as pdr.

azul process

  • Default dynamic range parameters were updated to increase SNR.

  • Option --wcs was removed:

    • For FITS files, standard WCS records are used;

    • For TIFF files, the parameters are saved as standard metadata;

    • For other formats, the parameters are written following the output name with extension .wcs.

  • Placeholders were renamed.

  • Intermediate outputs are not written anymore by default.

azul roam

  • The sequence file is passed as a named option.

  • The keys in the sequence file were changed:

    • x and y have become a single c for “center”;

    • z has become s for “scale” or “size”;

    • a has become r for “roll”.

  • The origin of the image coordinates is the bottom left corner (instead of top left).

  • Start and stop frames are passed with slicing notation.

Bug fixes

  • Unit tests were fixed.

azul process

  • In some systems and environments, the script was crashing when --wcs was enabled and no slicing was performed.

  • Masked saturated stars were rendered too dim.

New features

  • The following commands were added: arrange, cite.

  • Logs are written to stderr with a proper logger, which also supports log levels (option --log).

  • The following commands support piping:

    • retrieve can read targets from stdin, write workdirs to stdout,

    • process can read workdirs from stdout, write render filenames to stdout,

    • arrange can read inputs from stdin, write collage filename to stdout,

    • roam can read input from stdin, write video filename to stdout.

  • Default arguments can be overloaded with environment variables.

  • Angular parameters support various suffixes like °, d, m, s

azul retrieve

  • Retrieve named objects.

  • Retrieve coordinates.

  • Retrieve cutouts (option -r).

  • Option -n limits the number of tiles per target.

  • Option -q performs queries only (no download).

  • Option -f with no argument forces all downloads.

azul process

  • Process a sequence of workdirs.

  • Accept workdirs with subdirectories.

  • Auto-tune white point with -w 0.

  • Clipping is enabled by --curves.

azul arrange

  • Arrange a collection of images into a regular grid.

azul roam

  • Add WCS to planar projection.

azul cite

  • Print citation instructions.

Cleaning

  • Documentation uses proper HTML pages (which include CLI documentation).

  • Demo pipelines are included.

  • Packaging is handled with uv.

  • Pixel ordering is consistent.

  • Units parsing is centralized.

  • Merged AstroQuery class into SAS.

Known issues

azul retrieve

  • #85 – DEEP tiles always have precedence over WIDE tiles, even if object are cropped in the DEEP tile and not in the WIDE tile.

  • #35 – Cartesian coordinates are used, which cannot handle positions around RA = 0° = 360° or dec = +/-90° (where there are no Euclid data anyway).

azul roam

  • #104 – Field of view is approximate with Gaia Sky.

  • #55 – Zoom < 1° is not supported for Gaia Sky.

  • #31 – Zoom > 100% is not supported.

1.2.0

New features

azul find

  • FITS files and WCS files are supported as input with option --wcs, in which case the location is returned in pixel coordinates, and an azul process command is proposed to process the region around the location.

azul process

  • Outputs can be saved as FITS files, in which case WCS records are written to the header.

  • For all output formats, a WCS file can be saved with option --wcs.

azul roam

  • A FITS file or WCS file can be passed to option --wcs.

  • Equirectangular images are supported as input.

  • Gaia Sky is supported as input.

  • RA/dec coordinates are supported for equirectangular images, Gaia Sky, or with option --wcs.

  • Zoom can be specified as a horizontal field of view for equirectangular images, Gaia Sky, or with option --wcs.

  • Low-pass filter is applied for wide fields of view to prevent aliasing.

Improvements

azul process

  • Arbitrary output paths can be configured with new placeholder {workspace}.

azul roam

  • Output name is built from input names.

  • Default FPS is 25.

Optimization

azul roam

  • Image pyramids are built to speed up rendering of frames with wide fields of view.

Known issues

azul find

  • #35 – Cartesian coordinates are used, which cannot handle positions around RA = 0° = 360° or dec = +/-90° (where there are no Euclid data anyway).

azul process

  • #16 – Inpainted saturated pixel are rendered too dim.

azul roam

  • #55 – Zoom < 1° is not supported for Gaia Sky.

  • #31 – Zoom > 100% is not supported.

1.1.1

Bug fixes

azul process

  • Command did crash when output template contained {step}.

1.1.0

Bug fixes

azul crop

  • Command did crash when reading the image.

New features

azul retrieve

  • New, SAS-based data provider for Internal Data Releases (default provider).

Improvements

azul process

  • Stacking of multiple inputs per channel relies on median instead of mean.

  • Ouput(s) can be written anywhere, not only in the tile folder.

Optimization

azul process

  • Inpainting is a bit less memory-greedy.

1.0.0

Initial features

azul find

  • [Requires internet] Find object coordinates.

  • [Euclid members] Find index of tiles containing given objects or coordinates.

azul retrieve

  • [Requires internet] Download input data for a collection of tiles.

azul crop

  • Select the region to be rendered with a rudimentary graphical interface.

azul process

  • Render a color image from MER data.

azul roam

  • Produce a pan-and-zoom video from an image.

Known issues

azul find

  • #35 – Cartesian coordinates are used, which cannot handle positions around RA = 0° = 360° or dec = +/-90° (where there are no Euclid data anyway).

azul process

  • #16 – Inpainted saturated pixel are rendered too dim.

  • #19 – Missing values are badly handled when multiple inputs are provided for a channel.

azul roam

  • #31 – Zoom > 100% is not supported.