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How are gigapixel (GP) panoramas processed?

I just made a small panorama with ~2 gigapixels and I am processing it using Photoshop of the stitched panorama. Output from my stitching software works but although I have a state-of-the-art machine it is slow.

What is the correct way to process such huge images?

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closed as too broad by Itai, MikeW, mattdm, Paul Cezanne, Michael Clark Sep 23 '13 at 12:16

There are either too many possible answers, or good answers would be too long for this format. Please add details to narrow the answer set or to isolate an issue that can be answered in a few paragraphs.If this question can be reworded to fit the rules in the help center, please edit the question.

Have you tried searching this site for "gigapixel"? What did you find and what questions do you still have? – dpollitt Sep 22 '13 at 15:42
Well the best way to process them is to buy a new i5 with a 2.85 THz chip in it with 40Gb ram to make sure you donot get out of memory so that you continue your work without having a fear of this machine getting slow. Of course man, when you're trying out heavy things you are going to get slow down! :/ and also, use the link provided by @dpollitt. You should search first that's what about and help section tells you! – Afzaal Ahmad Zeeshan Sep 22 '13 at 19:31
Why don't you process all the partial shots before stiching? I work to process only one shot, then copy/paste the same edits into all the other shots, and only the last step is to let stiching software do its job. Dunno if that is the right way, but it has worked for me. – Esa Paulasto Sep 22 '13 at 21:02
@EsaPaulasto - see Stitch first and edit later or vice versa? – dpollitt Sep 22 '13 at 22:43
What edits are you doing in Photoshop afterwards? I'd like to know what you can't do before. Lots of things come to mind but what lets find out what you want and then look if it can be done efficiently. – Unapiedra Sep 22 '13 at 22:46