Voronoi segmentation for Astronomy on Legacy Survey data
Version 1

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Workflow Type: Galaxy

Stable

Modified workflow to perform Voronoi segmentation, based on https://usegalaxy.eu/published/workflow?id=23030421cd9fcfb2.

Input requirements:

RA: -- right ascension in degrees as a float number.
Dec: -- Declination in degrees as a float number
Radius: -- the radius of the cone to be queried in arcminutes as a float number
Pixel size: -- the size of the pixel in arcseconds
Band: -- the band (channel) of the image: g, r, z, i

SEEK ID: https://workflowhub.eu/workflows/1730?version=1

DOI: 10.48546/workflowhub.workflow.1730.1

Inputs

ID	Name	Description	Type
Band	Band	n/a	string
Dec	Dec	n/a	float
RA	RA	n/a	float
Radius (arcmin)	Radius (arcmin)	n/a	float
pixel size (arcsec)	pixel size (arcsec)	n/a	float

Steps

ID	Name	Description
5	DESI Legacy Survey	toolshed.g2.bx.psu.edu/repos/astroteam/desi_legacy_survey_astro_tool/desi_legacy_survey_astro_tool/0.0.1+galaxy0
6	astropy fits2bitmap	toolshed.g2.bx.psu.edu/repos/astroteam/astropy_fits2bitmap/astropy_fits2bitmap/0.2.0+galaxy1
7	Split image along axes	toolshed.g2.bx.psu.edu/repos/imgteam/split_image/ip_split_image/2.2.3+galaxy1
8	Select first channel	__EXTRACT_DATASET__
9	Filter 2-D image	toolshed.g2.bx.psu.edu/repos/imgteam/2d_simple_filter/ip_filter_standard/1.12.0+galaxy1
10	Convert image format	toolshed.g2.bx.psu.edu/repos/imgteam/bfconvert/ip_convertimage/6.7.0+galaxy3
11	Perform histogram equalization	toolshed.g2.bx.psu.edu/repos/imgteam/2d_histogram_equalization/ip_histogram_equalization/0.18.1+galaxy0
12	Convert single-channel to multi-channel image	toolshed.g2.bx.psu.edu/repos/imgteam/repeat_channels/repeat_channels/1.26.4+galaxy0
13	Filter 2-D image	toolshed.g2.bx.psu.edu/repos/imgteam/2d_simple_filter/ip_filter_standard/1.12.0+galaxy1
14	Threshold image	toolshed.g2.bx.psu.edu/repos/imgteam/2d_auto_threshold/ip_threshold/0.25.0+galaxy0
15	Threshold image	toolshed.g2.bx.psu.edu/repos/imgteam/2d_auto_threshold/ip_threshold/0.18.1+galaxy3
16	Convert binary image to label map	toolshed.g2.bx.psu.edu/repos/imgteam/binary2labelimage/ip_binary_to_labelimage/0.5+galaxy0
17	Compute Voronoi tessellation	toolshed.g2.bx.psu.edu/repos/imgteam/voronoi_tesselation/voronoi_tessellation/0.22.0+galaxy3
18	Process images using arithmetic expressions	toolshed.g2.bx.psu.edu/repos/imgteam/image_math/image_math/1.26.4+galaxy2
19	Count objects in label map	toolshed.g2.bx.psu.edu/repos/imgteam/count_objects/ip_count_objects/0.0.5-2
20	Extract image features	toolshed.g2.bx.psu.edu/repos/imgteam/2d_feature_extraction/ip_2d_feature_extraction/0.18.1+galaxy0
21	Colorize label map	toolshed.g2.bx.psu.edu/repos/imgteam/colorize_labels/colorize_labels/3.2.1+galaxy3
22	Overlay images	toolshed.g2.bx.psu.edu/repos/imgteam/overlay_images/ip_overlay_images/0.0.4+galaxy4

Outputs

ID	Name	Description	Type
Single channel image	Single channel image	n/a	File
multi-channel image	multi-channel image	n/a	File
Smoothed image	Smoothed image	n/a	File
mask	mask	n/a	File
label map	label map	n/a	File
tesselation	tesselation	n/a	File
segmentation	segmentation	n/a	File
object count	object count	n/a	File
image features	image features	n/a	File
colorized label map	colorized label map	n/a	File
segmented image	segmented image	n/a	File

Version History

Version 1 (earliest) Created 13th Jun 2025 at 11:02 by Andrei Variu

Initial commit

Frozen Version-1 a55de5b

Creators and Submitter

Creators

Andrei Variu
Riccardo Massei
Even Moa Myklebust

Submitter

Andrei Variu

Tools

Galaxy Image Analysis

scikit-image

Citation

Variu, A., Massei, R., & Myklebust, E. M. (2025). Voronoi segmentation for Astronomy on Legacy Survey data. WorkflowHub. https://doi.org/10.48546/WORKFLOWHUB.WORKFLOW.1730.1

License

MIT License (MIT)

Activity

Views: 1378 Downloads: 246 Runs: 2

Created: 13th Jun 2025 at 11:02

Last updated: 11th Jul 2025 at 10:42

Annotated Properties

Topic annotations

Physics

Voronoi segmentation for Astronomy on Legacy Survey data Version 1