Voronoi segmentation for Astronomy on Legacy Survey data
Version 1

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Workflow Type: Galaxy
Work-in-progress

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

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

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Open master a55de5b
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Tools
Galaxy Image Analysis
scikit-image
License
MIT License
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Views: 46   Downloads: 13   Runs: 0

Created: 13th Jun 2025 at 11:02

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