topic Re: Orientation/CamOri string - affine transformation parameters in Oriented Imagery Questions

Orientation/CamOri string - affine transformation parameters

ky_rs — Tue, 10 Dec 2024 20:03:30 GMT

Hi, I'm trying to make use of the "long" version, Type 1 of the Orientation string when importing my imagery:
1|H_WKID|V_WKID|X|Y|Z|RA1|RA2|RA3|A0|A1|A2|B0|B1|B2|FL|PPX|PPY|K1|K2|K3|P1|P2

I am unsure on the parameters A0|A1|A2|B0|B1|B2. I found this PDF that gives a little more info than the documentation: https://www.esri.com/content/dam/esrisites/en-us/about/events/media/UC-2019/technical-workshops/tw-5765-872.pdf (page 23). It says that these are the affine transformation parameters to camera center in the ground to image direction, with A0 and B0 being offsets in cols and rows, and A1,B2|A2,B1 being 1/pixelsize in microns.

If I have a camera with a resolution of 2048x2488 and a pixel size of 3.45 microns in both x and y (a Ladybug5+), would that make for the following?
A0 = 1024
A1 = 0.289855 (1/3.45)
A2 = 0.289855
B0 = 1244
B1 = 0.289855
B2 = 0.289855

Or am I way off here? Thanks for looking!

Re: Orientation/CamOri string - affine transformation parameters

JamesHead-Mears1 — Mon, 16 Dec 2024 00:39:50 GMT

I've been diving into this world too and there are some updated details on the input table here: Oriented imagery table—ArcGIS Pro | Documentation

They have an example of how to calculate those values in there but it seems a little different to what you are coming up with. Hopefully, it doesn't muddy the waters too much for you.

Re: Orientation/CamOri string - affine transformation parameters

ky_rs — Tue, 21 Jan 2025 19:56:22 GMT

Thanks! That is what I was looking for and got the orientation string working for me (I think). Map-image location still isn't quite as accurate as I would like but I believe that may be down to the DEM I am using at this point.