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Re: Calibrating a Camera-Lens-unit for measuring angles
From: Marcel Tschudin
Date: 2012 Sep 9, 21:56 +0300
From: Marcel Tschudin
Date: 2012 Sep 9, 21:56 +0300
Regarding
For those of you who are not familiar with performing least square fits I offer to do it for you (in reasonable quantities) using the Excel file which I set up for calculating other camera-lens-units. So, once you collected somewhere around a hundred calibration measurements just send me them. Depending on the calibration method used the values are
either
Z[moa] and D[Px]
or
ds[moa/Px] and (x-xo)[Px]
Check that your listed values can easily be transferred into a spread sheet, thus using one data pair per line and separating the two values with e.g. the tab-key, or, even easier, send me them in an Excel sheet or a Google doc spread sheet.
Marcel
-> Determine the calibration function by determining with a least square fit the parameters a and b of one of the two following functions:
either
Z[moa] and D[Px]
or
ds[moa/Px] and (x-xo)[Px]
Check that your listed values can easily be transferred into a spread sheet, thus using one data pair per line and separating the two values with e.g. the tab-key, or, even easier, send me them in an Excel sheet or a Google doc spread sheet.
Marcel
