Saul wrote:Do we have some information what is the best way/workflow to retouch stereo pairs ? For example, after using spot removal tool in PS, looking at the stereo, I have artifacts around this place, because tool fixed left side little bit differently than the right side.
I don't know a really good way to retouch stereo pairs. Mostly I try to avoid retouching them. My favorite technique for that is to show a large ordinary single image that may have been retouched as needed, combined with a lower resolution stereo pair that probably still has artifacts of various sorts.
When I do decide to retouch stereo images, it is usually by:
1) retouching inside Zerene Stacker from a Stack Selected image with the same shift, as a way of attacking transparent foreground, and/or
2) cloning inside Photoshop from one left/right view to the other, to eliminate some artifact that appears on one side but not the other.
The first one usually gives no great problem, perhaps because transparent foreground happens around edges, where there are always left/right differences anyway.
The second one is trickier. It requires that the clone be done with exactly the same Y coordinates for source & target (because vertical disparities are always bad) and with a difference in X coordinates that corresponds to the depth of the surface at the place that cloning occurs. I attack this by using pixel coordinates shown in the Info panel to get the same Y coordinates, and doing local feature matching by eye to get appropriate X coordinates. If the points to be cloned are very far apart, then I have to open two windows onto the same image, so that I can have both the source and destination locations shown simultaneously and large enough to work with. All this messing around is time consuming at best. Worse, often I miss by a little in getting the appropriate X coordinate, with the result that the cloned patch then appears to sit in front or behind the surface, and I have to undo the clone and try again.
It's clear that the process could benefit from some software support specifically to make left/right cloning simpler. What's not clear is exactly what that support should look like. I'm not aware of any other software package that already implements anything like this. If anybody else is, then I would greatly appreciate a pointer to it.
--Rik
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