Calculating the fiducial coordinates from measurements

If you do not have calibrated fiducial coordinates, you can estimate the reference frame by:
  • Using a ruler to measure distance between the fiducial marks on the paper print or diapositive
  • Using the corners of the exposure (not the corners of the file or paper) as fiducial marks if you have scanned the entire print

To calculate the fiducial coordinates from measurements

  1. In the Scanned-film Camera Calibration Information window, click Compute From Length.
  2. In the Compute Fiducials window, type the measurements in the Top edge length, Right edge length, Bottom edge length, and Left edge length boxes, respectively.
Parent topic: Setting up the camera calibration for aerial photographs
Previous topic: Entering radial lens distortion from a table
Next topic: Collecting fiducial marks

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