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General / Re: Group or Split Calibration for Alignment of Historic Aerial Photos?
« on: September 23, 2014, 06:34:41 AM »
So I finally got around to doing my calibration and pre-processing test. I've attached the results with a short write up.
In short, the different calibration settings and the pre-processing didn't influence the orthomosaic accuracy by that much. This suggests that aligning fiducials and estimating initial camera calibration may be unnecessary for accurate alignment of historic aerial photos. However, I suspect that part of the reason for the high accuracy is that these scans are actually pretty good with the fiducials at fairly similar locations (~20 pixels diff) in all the photos.
In short, the different calibration settings and the pre-processing didn't influence the orthomosaic accuracy by that much. This suggests that aligning fiducials and estimating initial camera calibration may be unnecessary for accurate alignment of historic aerial photos. However, I suspect that part of the reason for the high accuracy is that these scans are actually pretty good with the fiducials at fairly similar locations (~20 pixels diff) in all the photos.