The physical effects of film deformation in small format camera calibration

S. Robson

doi:10.1117/12.2294274

1 August 1990 The physical effects of film deformation in small format camera calibration

S. Robson

Proceedings Volume 1395, Close-Range Photogrammetry Meets Machine Vision; 13950V (1990) https://doi.org/10.1117/12.2294274
Event: Close-Range Photogrammetry Meets Machine Vision, 1990, Zurich, Switzerland

Abstract

The physical properties of photographic roll film in conjunction with the design of small format cameras are generally optimised for ease of use and reliability during pictorial photography. Such design contributes greatly to the problems associated with the accuracy of calibration and analytical data reduction of non and semi metric small format imagery. The results of experimentation into both in-plane and out-of-plane film deformation, using a variety of commercially available 120, 220 and 70mm monochrome film stocks, are presented. Physical parameters investigated include environmental conditions, image density, processing regime, measurement and film back variations. Some results from the close range calibration of a modified small format camera are discussed in the light of the above experiments. A practical analytical data refinement system is envisaged, allowing potential accuracy to be balanced against the economics of the time consuming measurements of reseau images in an analytical stereoplotter.

Citation Download Citation

S. Robson "The physical effects of film deformation in small format camera calibration", Proc. SPIE 1395, Close-Range Photogrammetry Meets Machine Vision, 13950V (1 August 1990); https://doi.org/10.1117/12.2294274

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