Aligning Historical Aerial Imagery - improving point detection

[jf225]

Hello,

I'm doing a project aligning historical aerial imagery:
https://core.tdar.org/project/366287/historic-aerial-photos-of-the-northwest-coast-california-1947-1948
I believe these are photos of paper prints of historical photos, although I have very little information about the digitization process.

My process so far has been to align images from various flights (all part of the same series, taken within a week or two of each other) by their fiducials in Hugin.  First the fiducials are aligned, the images are all cropped to consistent dimensions and to eliminate any extra border.  Then I attempt to align the (individual) images in Metashape, using default opitons.  Using a mask over fiducial marks has not seemed to affect results.

So far I have found that images within flight lines seem to align well in regards to forward lap, but I cannot not get an alignment between flight-lines: there is no alignment with regards to sidelap.

My question is does anyone know if exposure correction (option within Hugin) would help with point detection in Metashape? Or does anyone have recommendations to try in order to improve alignment with regards to my apparently limited side lap?

**update** upon further inspection, I realize that the crop operation is not centered around principal point (focal center), evidenced by the fact that more of the fiducial marker is visible on one side of the image.  Even so, Metashape seemed to align images fairly well.

Would my results be better if my image is cropped with regard to principal point, or can offset of the image center from focal center be accounted for in Metashape?

[PROBERT1968]

I am not familiar with the Hugin but it looks like it does not take longitude, latitude and altitude in order to process them.

I am doing the old aerial photographs on my forest and have a lot of them...

I use ArcGIS Pro to get the longitude, latitude and altitude from there and then input them into Metashape and you would have to find the features from each image to match them

In the past I use Google Earth Pro and have trouble align them for a year and decided to switch to ArcGIS Pro and got better results there...

Since you already stitch your aerial photos and I doubt it might not work in Metashape . I personally have not use it there if I were use yours ...