Make multiple stacking refinements to obtain different versions of the same image

Make multiple stacking refinements to obtain different versions of the same image

In the case of processing a multi-hour meteor shower session you may want to get different versions of the final image (each with the radiant aligned at different times of the night), for which it is very useful to be able to apply stacking refinement as many times as desired.

And to illustrate this I will start from the image I obtained in the previous article where I explain how to do the stacking refinement (https://help.nebulb.com/portal/en/kb/articles/refining-the-stacking):



The above image is the main goal I wanted to achieve that night (with the radiant inside the image and centered), but it is true that, as I was capturing photos for several hours, I was also able to obtain other different and equally interesting results from that night.

Below I show you step by step how you can obtain multiple versions of the same image by successive refinements of the stacking:

1. Select the time of the night for which you want to have the sky

If you want to modify the time of the night for which to leave the sky aligned, the first thing you have to do is to move the bottom time slider (1) to the desired time. When you do this you will see that the button (2) just to the right of the time slider is enabled and becomes white:




2. Select the new base image

Once the initial stacking is finished Nebulb allows you to modify the base image, for which you simply select the desired time of night (as you have seen in the previous step) and press the button to select the new base image.



As you can see in the previous image, when pressing the selection button of the base image, the button is disabled and in orange (1) and the image of the sky for that specific moment of the night is displayed on the screen. Likewise, the stacking refinement button (2) remains enabled and white (indicating that the selected base image has not been refined).


3. Reset the previous refinement

In the case of having previously refined the stacking, before continuing, it is convenient to reset (delete) the previous refining. To do this, simply press the button (1) to reset the stacking and accept the confirmation message (2) that appears:




IMPORTANT: Make sure that the message indicates that the refinement is to be discarded and not the general stacking, since, if the refinement is not done, this button resets (clears) the initial stacking.

ADVICE: Before resetting the previous refinement it may be interesting to save the project under another name so that, if in the future you want to get the image of the previous refinement again, you do not have to run it again.


4. Selects the stacking refinement interval

Resetting the previous refinement enables the selector of the time range that will be used to refine the stacking again. That is, this control selects the time interval that will be taken into account to make a micro-stacking centered on the new base image.

As you can see in the image below, the default value is 15 minutes, which then allows you to apply strong light pollution reductions without noise being a problem. That said, you can select any other value from the drop-down list.




5. Executes stacking refinement

Finally, all that remains is to save the project and execute the stacking refinement (by pressing button 1 and confirming the pop-up message 2).



Once the stacking refinement is finished, the image displayed on the screen is the same as before, but now without noise.



At this point, all that remains is to apply the adjustments you want to leave the image as you like it.








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