This is actually a question, not a tutorial. In any case I’ll integrate the answers I eventually get to the text, so scroll down if you’re interested (sometimes comments are not indexed by google and I’ll also spread the question in other medias).
Photoshop has a great tool for stitching photos together and them making panoramic (panos), as long as you have overlapped them about 20% and … but sometimes you have to tweak them and that’s when the problem starts.
To explain the problem I’m having, I’ll take the opportunity to show a bit of what photoshop is doing.
Example: small pano in Venice, Italy. Three shots put together and to make my case visually clear I have exaggerated the tone difference between them. Left is 1.5 stop darker and very low saturation, middle is “normal” and right is 1.5 brighter and high saturation.
Photoshop will blend them together light this
It will use parts of the images and mask the rest, as we can see here.
If you notice the sky you’ll see that the plane track in the sky doesn’t really match.
So the option is to get the whole track from the same shot. And the way to do it is to hide and show in the respective masks. The problem is that photoshop is applying a color match only to what is visible through the masks.
If you deactivate the masks that’s what you have.
And when you try to bring the hidden part back the colors really don’t match.
The question here is what is to be done in this case??? Auto-blend will not help, it will basically rebuild the masks as they were in the first time!!
Another example is here, the missing part of the boat and the canoe that I want gone from my nice Venetian pan (canoes and Venice … really?) and if I just play with the masks, colors might not match properly.
One option is cloning luminosity, color, the whole thing, patching it content aware … in some situations it works, but in some others, I already have the proper content, all it’s needed is to repeat the color matching that was applied before.
If you know the answer! Please, let me know!