Camera Flight Tests And Image Evaluation

Ulf J.V. Ringh

doi:10.1117/12.944419

11 December 1984 Camera Flight Tests And Image Evaluation

Ulf J.V. Ringh

Proceedings Volume 0496, Airborne Reconnaissance VIII; (1984) https://doi.org/10.1117/12.944419
Event: 28th Annual Technical Symposium, 1984, San Diego, United States

Abstract

This paper describes camera flight tests and image evaluation for conventional cameras as they are carried out by the Swedish Defense Materiel Administration (FMV), The image evaluation method used is resolving power by use of three bar target. A. special square target (4x4 m) is also used to measure contrast ratio on the film with a microdensitometer. Hereby the target contrast on the image can be evaluated. Control of the development process has partly been simplified through evaluation of gamma by calculating the derivative of the D-Log E curve by the least square method. Results of contrast measurements are given from tests carried out in good weather con-ditions with a horizontal visibility of more than 30km. The measured contrast ratios and theoretical predicted values have been compared. The model used for this prediction of atmospheric contrast reduction is compiled from known literature. The comparison shows that the model used for the prediction was usable.

Citation Download Citation

Ulf J.V. Ringh "Camera Flight Tests And Image Evaluation", Proc. SPIE 0496, Airborne Reconnaissance VIII, (11 December 1984); https://doi.org/10.1117/12.944419

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