Use Of Two-Media Photogrm4Metry In Biological Research

V. Kratky

doi:10.1117/12.975332

1 June 1971 Use Of Two-Media Photogrammetry In Biological Research

V. Kratky

Proceedings Volume 0026, Quantitative Imagery in the Biomedical Sciences I; (1971) https://doi.org/10.1117/12.975332
Event: Quantitative Imagery in the Biomedical Sciences I, 1971, Houston, United States

Abstract

Photogrammetry was applied to help biological research in determining the growth rate of living jelly fish colonies bred under different laboratory conditions. The examined species of jelly fish is a tiny roundshaped animal with diameter up to three milimeters. It is grouped and reproduced in colonies. Individual colonies are kept on slides submerged in sea water. Pairs of close range photographs were obtained from a press camera that did not meet all photogrammetric requirements. It was, therefore, indispensable to calibrate each individual picture. A special self-calibrating system was designed for this purpose. This made it possible to perform the calibration directly from the measurements on the photographs of the colonies. The techriique of photogrammetric evaluation on the Wild A-7 plotter was adapted to cope with the specific two-media conditions of the photography (salt solution and air between the object and the camera). The theoretical analysis of the case led to the use of a relatively simple photogrammetric treatment of photographs with affine-transformed bundles of projecting rays in the plotter.

Citation Download Citation

V. Kratky "Use Of Two-Media Photogrammetry In Biological Research", Proc. SPIE 0026, Quantitative Imagery in the Biomedical Sciences I, (1 June 1971); https://doi.org/10.1117/12.975332

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