It does not work always …
It will be fantastic if this simple technique works in any time & any place. But it is not the case, no matter how badly want to. The two pictures below are the example of stitching failure.
3 film strips
The result of stitching
With naked eyes, they seemed to be good enough to merge together, but for Photoshop image processing, face and body shots were OK to stitch but last one, leg was not.
As shown, area #1 and #2 looks the similar, but #2 is noticeably fuzzier than #1. Photoshop can not recognize them as connecting area of the images, thus fail to merge them.
3 photo strips
The same case, face and body were merged successfully, but lower part of body was not. The posture and shooting angle did not changed much, so shouldn’t be a problem.
But the skirt which is a connecting part of 2nd and 3rd photo, one is sharp and the other is blurred (looking at roses), and ended up stitching failure.
Landscape Pano vs Portrait Pano
When take a panorama photo in landscape, I shot in smaller aperture opening, like f11 or 16, so did not suffer stitching failure due to image fuzziness. However in portrait, I use large opening aperture, so image stitching fails from time to time. (For this event, I took 2 lenses, 85mm f1.4 and 55mm f1.2 and used them in f2.0 and f1.8 aperture respectively)
It’s not Game Over : retry
I cut out upper part of blurred images and tried again. For 1st example shots, it become successful once legs shot slightly cropped (result shown below). But I can not make 2nd example combined even after many different croppings.
Panorama feature in Photoshop does not have a manual setting to deal with this kind of situation, something like threshold change or merge point adjust… So, have to rely solely on the program’s automation. Therefore it requires good anticipation and plan before shooting. Most of all, need to decide where to focus, where will be connecting points and avoid posture and angle changes during multi-shoot sequence.
If there were one more photo focused on the skirt (roses) in between the second and third shot, all photos will be nicely merged together, even in case of 2nd failure example I bet. This kind of anticipation requires practice and trial-and-error.
Successfully stitched photo
// to be continue, part 3 //