Jan 26

Reduce Star Size in PixInsight

Reducing star size can helping highlight the main object like a Galaxy or a Nebula. PixInsight offers herefor a process called “Morphological Transformation”.

On some images, I use it twice (example: Cygnus Loop). Note:

Create every time a new Star Mask! Do not use the same mask for iterative transformations!

 

Step-by-step

M33 Triangulum Galaxy:

  1. StarMask
    Create a StarMask. I always use the default values here.
    2016-11-19-19_24_48-pixinsight-1-8
  2. StarMask
    Check the created StarMask. If you are not happy with it, use the Scale value to change the selection of stars in the mask and create a new mask.
    2016-11-19-19_25_24-pixinsight-1-8
  3. Overlay mask
    Overlay the StarMask to the main image (see video). For a better view, disable the mask preview –> Ctrl + K
    2016-11-19-19_25_54-pixinsight-1-8
  4. Morphological Transformation
    Open the Morphological Transformation tool. Change the Amount value to reduce the down-scaling effect.
    2016-11-19-19_26_13-pixinsight-1-8
  5. Result
    2016-11-19-19_26_29-pixinsight-1-8

 

 

See the difference before and afterwards the Morphological Transformation:

image08_abe

2 comments

  1. Thilo

    Hoi Karol,
    schöne Webpage, hier kann man ja noch was lernen 🙂
    Bin auch gerade dran eine zu erstellen, aber das wird wohl noch dauern….

    • star-watcher

      Hi Thilo. Danke Dir! Ja, ich mache hier mein eigenes kleines Nachschlagewerk 🙂 Kann man schon was anschauen bei Deiner Webpage?

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