I am trying to manually create a HDR or mixed exposure image.  I want to 
stitch 8 image together with three different exposure and sharpening 
settings.

I output jpg set A.  create control points, define projection, and all 
other settings, optimize, and stitch producing output A in tiff and saving 
the parameter file .pto

I derive a second set of jpgs of the same spatial extent, but different 
levels and sharpening, and place them in the original folder, moving the A 
inputs to another folder.  The second set, B, are given the same name as 
the A set.

I open the original .pto file, and it loads the B set of images.  I make no 
changes, but go straight to 'stitch', and produce output B.  When I overlay 
B.tiff onto A.tiff, there are significant differences in the panorama.  The 
spatial extent is the same, but internally features do not align.  There 
are discrete regions with relative translations of image regions.  (ditto 
for subsequent versions as well, with variable differences)

What could be causing this, and is there a work around?  has anyone seen 
this before?

thanks

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