Extracting a "Dotted Network" skeleton from a glowing raster image for vector editing

[saint_m]

good day dear denzjos 

many many thanks for the quick reply. Glad to hear from you. its so awesome  this forum here. 


You: 

Quote:This is a completely different problem: some information: https://www.jacknicholsphoto.com/process...-way-photo

ahhh: note: all (!!!) the above  mentioned examples - they should work only more or less just as examples to get along the way - in other words to learn. 
I am currentliy looking for some examples that may fit here - but well - as you see: i have really my difficulties to find such..



well as mentioned above - i am looking for a really simple example -where i can do some experiments - towards a solution like the following... 


My assumption is to use GIMP to kill the background and Inkscape to trace the dots to vectors. Is there a way to do this purely in one software?

the question here - and the idea i am after is a so called  "Isolation Technique" .. (and below i am trying to explain what is meant here; 


well:  How do I isolate in a example-picture only the brightest: lines/dots  (..without dragging the "the rest" (of the picture) along with them?.....

 - Is it better to work with Layers (e.g., subtracting a blurred layer)?
 - Or is Color Decompose (HSV - Value channel) the standard approach?
 - Are there specific filters (like "Edge Detect" or "Threshold") that preserve the dot structure without making them blobs?

the Question 3: The Vectorization:
 
When using Inkscape's Trace Bitmap, how do I prevent the scattered dots from merging together? Imagine: the original image has distinct nodes, but the glow connects them. How do I tell the software to separate the "nodes" from the "edges"?

Hmm - but dear denzjos, 

it looks like we do not have an appropiate demo that can be used here. 

i am going to look for one ... i am going to surf and try to find some examples - to illustrate what is meant here.


Meanwhile - dear Rich2005 and dear denzjos - many many thanks for your continued support - and your great and generous help. It is really amazing 
and i am so happy to be part of this superb and awesome forum which is a great place for 

a. learing 
b. idea sharing and a awesome example for a 
c. just overwhelming Community of Practice 

thanks for all - i really really hope that lots of others have (also at least)  some benefit form our discussion.


and now i am trying to find som examples.


untill soon. 

greetings. Saint_m

[rich2005]

This from yesterday where you asked about separating dots and connecting lines.

To show how difficult that might be, a very-very simple chart and one way to proceed.

Select the dots using a round brush and the quickmask  see: https://docs.gimp.org/3.0/en/gimp-image-...utton.html  Obviously time consuming even with a simple chart.

From that selection make two images one of the selected dots and one with selection inverted (the lines)

They are used in inkscape (1) Dots color traced and (2) Lines center line traced.

   

The source and svg attached just as a simple example. Remember to unzip it.

I know you will not take any notice of me, but asking how-to is not as good as experimenting yourself.