The Availability And Accuracy Using Direct Linear Transformations For The High-Speed Stereophotography In Explosion Processes

Wu Lingguang; Ding Jiongwang

doi:10.1117/12.969249

7 June 1989 The Availability And Accuracy Using Direct Linear Transformations For The High-Speed Stereophotography In Explosion Processes

Wu Lingguang, Ding Jiongwang

Author Affiliations +

Proceedings Volume 1032, 18th Intl Congress on High Speed Photography and Photonics; (1989) https://doi.org/10.1117/12.969249
Event: 18th International Congress on High Speed Photography and Photonics, 1988, Xi'an, Shaanxi, China

Abstract

A large amount of experiments have demonstrated that Direct Linear Transtormations (DLT) can be used to process the observations of the high-speed stereophotography in explosion processes. An accuracy of 2-3 cm can be obtained under the following conditions, photoscale 1: 1000; simultaneous exposure frequency 1000HZ; about the same elevation of two cameras; the intersecting angle of two principal optical axes 30°-75°; better distribution of the control points. Also the accuracy can be up to the order of a few decimeters even if the elevation difference of two cameras is relatively large, the intersecting angle is as small as 7.5°, and no control points in the target area. The intersecting angle has a significant influence on the accuracy of X-coordinates, and the larger elevation difference of the two cameras damages the accuracy of Z-coordinates. Nevertheless, the distribution of the control points have an important effect on the accuracy of X-,Y-,and Z-coordinates, as a result, that no control points exist in the explosion area, or cotrol points are available in one horizontal plane should be avoided.

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Wu Lingguang and Ding Jiongwang "The Availability And Accuracy Using Direct Linear Transformations For The High-Speed Stereophotography In Explosion Processes", Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989); https://doi.org/10.1117/12.969249

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