Creating small-format camera coordinates: 3 techniques for interior orientation

William S. Warner

doi:10.1117/12.157145

15 October 1993 Creating small-format camera coordinates: 3 techniques for interior orientation

William S. Warner

Proceedings Volume 1943, State-of-the-Art Mapping; (1993) https://doi.org/10.1117/12.157145
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

Interior orientation (the initial step in comparator-based photogrammetry) requires a set of known photo-coordinates to act as reference points. Fiducials serve this purpose on metric survey cameras as do reseau targets on small-format, semi-metric cameras. Standard small cameras, however, are equipped with neither fiducials nor a reseau plate. To overcome this problem three attempts were made to create small-format camera coordinates. In the first method a clear template with four calibrated cross-hair targets was superimposed on a 35 mm diapositive (after the film was exposed). The second technique installed fiducials in the 35 mm camera body. In the third technique, original 645 imagery was custom enlarged so as to expose the entire frame edge on the print.

Citation Download Citation

William S. Warner "Creating small-format camera coordinates: 3 techniques for interior orientation", Proc. SPIE 1943, State-of-the-Art Mapping, (15 October 1993); https://doi.org/10.1117/12.157145

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