GIMP2 Image processing software

Mineral Moon from 29th December

Here’s a picture of last night’s full moon. I’ve spent a good part of the today learning some new processing techniques from the page below:

How To Photograph And Edit a Mineral Moon | Light Stalking

Unfortunately the steps are all in Photoshop, so I had to work out how to do them in GIMP, but it seems to have worked. I wanted to see if I could do this entirely in free software, but couldn’t get the noise reduction to work so there’s a bit of Pixinsight in here, but otherwise it’s all done with free stuff.

Capture details are: Canon DSLR on 130PDS – Disc is stack of 30 of 1/500s, halo is a single jpeg at 1/10 sec

Processing is: Converted to avi by Pipp, stacked in Autostakkert, Saturation and Layers in GIMP and Noise reduction in Pixinsight MLT.




Decomposing images in GIMP2

Tonight, I took my first image of the Moon with my QHY10 camera/Equinox 80mm telescope.

The image should colour dispersion. I do have a dispersion corrector but it is 1.25 inch fitting and the QHY10 camera is definitely 2 inch fitting.

I found that this problem can be addressed using GIMP2 software – in this software there is a function called decomposition – this splits a colour image into separate individual RGB images.

I have described the process I followed in GIMP2 to decompose images below.


Original image in GIM2 showing colour dispersion:

Selecting decompose in GIMP2:

Selecting RGB in decompose:

Decompose in GIMP2 results in 3 separate layers for each colour – each image is presented greyscale & can be saved: