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Instructions for RGB Combine in V1.082  

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(@rcol)
Brown Dwarf Customer
Joined: 11 months ago
Posts: 8
April 11, 2021 06:41  

Is there a set of instructions for this version. Everything I can find omits mention of several new functions/buttons. Very frustrating. 

There is an old maxim in Software Engineering that says: "you write the documentation FIRST then you code it ..."


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(@wvreeven)
Quasar Admin
Joined: 3 years ago
Posts: 1112
April 11, 2021 13:22  

@rcol A manual is under way. Is there a particular question that we can help you with meanwhile?


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(@rcol)
Brown Dwarf Customer
Joined: 11 months ago
Posts: 8
April 11, 2021 19:07  

Please excuse my lasck of knowledge in tis area, but tying to use RGB combine, the following questions come to mind:

a) is there a different workflow for a duoband filter (like L-Enhance/L-Extreme) images alone, vs. 
    a workflow for normal optical + narrowband filters. Which typically yields best results on approproiate targets?

b) "Choose a suitable composite formula for your data" ??? Is this standard terminology or applies only to APP? 
     How do I know which one to choose? I can guess at it, but what is RGB 1 and RTB 2? THEN hso

C) SELECT ratios ?? WHAT ARE THE TOP 2?

I end up muddy brown images are are obviously bad

Any assistance on a simple workflow much appreciated

 

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(@wvreeven)
Quasar Admin
Joined: 3 years ago
Posts: 1112
April 11, 2021 21:25  

@rcol No need to apologize or ask to be excused. We're here to help as much as we can.

a) With a dual-band filter in tab 0 choose the Ha-OIII Color algorithm. As with normal RGB, leave everything to their default values, go straight to tab 6 and click integrate.

b) This is common terminology. In tab 9 in "combine RGB" you can choose for instance the HOO 1 or HOO 2 formula depending on what you want to achieve. Note that when you change formula you need to click the "new formula" button.

c) That very much depends on the target and on your data. This is (in a way) the fun part of astrophotography where you choose what you want and what you like.

Note that all options in all tabs give very extensive help in a popup when you hover the mouse cursor over it.


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(@rcol)
Brown Dwarf Customer
Joined: 11 months ago
Posts: 8
April 12, 2021 07:15  

 "all options in all tabs give very extensive help in a popup" -- mostly true but not not always.

For example, there is a drop-down dialog box to the right of a [New Formula] button (that does not seem to fire - bug?) , can you provide some information like:

LRGB = Luminosity+Red+Green+Blue but what is the difference in between LRGB 1 & LRGB 2 & LRB 3

what is the difference in between RGB 1 & RGB 2

etc. why multiple levels om all selkections and how to use"?

what does the "DEFAULT" SELECTION DO"?

Any assistance greatly appreciated

 

 

 

 

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(@wvreeven)
Quasar Admin
Joined: 3 years ago
Posts: 1112
April 12, 2021 10:10  

@rcol I should have been more careful in my description. The button does fire though that's only visible after loading data. Choosing a different formula will only display what that formula does after you have loaded data. For instance, selecting LRGB 1 and then loading L, R, G and B data will show sliders for how much or each filter will contribute to each color when the data are combined. LRGB 1, 2 and 3 will show different contributions for each filter. RGB 1 and 2 likewise but without using the L filter. The sliders can be manipulated manually to get different contributions. And that's why the "new formula" button exists. Once one of more sliders have been moved, selecting a different formula would undo that selection so the user needs to click that button before the new formula is applied.

You are right that no popups are shown. I'll notify Mabula of this.


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