Timing considerations for integrating a flickerless projector with an imaging sensor

David S. Flynn; Breck A. Sieglinger; Robert Lee Murrer Jr.; Lawrence E. Jones; Eric M. Olson; Allen R. Andrews; James A. Gordon III

doi:10.1117/12.280943

15 July 1997 Timing considerations for integrating a flickerless projector with an imaging sensor

David S. Flynn, Breck A. Sieglinger, Robert Lee Murrer Jr., Lawrence E. Jones, Eric M. Olson, Allen R. Andrews, James A. Gordon III

Author Affiliations +

Proceedings Volume 3084, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing II; (1997) https://doi.org/10.1117/12.280943
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

In a series of measurements made to characterize the performance of a Wideband Infrared Scene Projector (WISP) system, timing artifacts were observed in one set of tests in which the projector update was synchronized with the camera readout. The projector was driven with images that varied from frame to frame, and the measured images were examined to determine if they varied from frame to frame in a corresponding manner. It was found that regardless of the relative time delay between the projector update and sensor readout, each output image was a result of two input images. By analyzing the timing characteristics of the camera integration scheme and the WISP update scheme it was possible to understand effects in the measured images and simulate images with the same effects. This paper describes the measurements and the analyses. Although the effects were due to the unique camera integration and readout scheme, the effects could show up when testing other sensors. Thus also presented in this paper are techniques for testing with resistive array projectors, so that the timing artifacts observed with various kinds of cameras are minimized or eliminated.

Citation Download Citation

David S. Flynn, Breck A. Sieglinger, Robert Lee Murrer Jr., Lawrence E. Jones, Eric M. Olson, Allen R. Andrews, and James A. Gordon III "Timing considerations for integrating a flickerless projector with an imaging sensor", Proc. SPIE 3084, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing II, (15 July 1997); https://doi.org/10.1117/12.280943

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