An analysis of spatial distortion, calibration, and translation effects for a scene projector

Breck A. Sieglinger; David S. Flynn; George C. Goldsmith II; Rhoe A. Thompson

doi:10.1117/12.488451

12 September 2003 An analysis of spatial distortion, calibration, and translation effects for a scene projector

Breck A. Sieglinger, David S. Flynn, George C. Goldsmith II, Rhoe A. Thompson

Proceedings Volume 5092, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing VIII; (2003) https://doi.org/10.1117/12.488451
Event: AeroSense 2003, 2003, Orlando, Florida, United States

Abstract

The effects of distortion in the complex optical system of an IR scene projector have motivated the development of methods for spatial calibration for scene projectors. A typical method utilizes the projection of a set of test images, with careful measurement of the location of points in the image. Given the projected and measured positions, a parametric model is used to describe the spatial “distortion” of the projection system. This distortion model can then be used for a variety of purposes, including pre-processing the images to be projected so that the distortion of the projection system is pre-compensated, and the distortion of the projection system is negated. This application and specific method have been demonstrated, and can compensate for a variety of distortion and alignment effects in the projector / sensor configuration. Personnel at the Kinetic Kill Vehicle Hardware-in-the-loop Simulator (KHILS) facility have demonstrated compensation and co-alignment of 2-color projection systems with sub-pixel precision using this technique. This paper describes an analysis of a situation in which pre-compensated images are translated (either mechanically or optically) to simulate motion of a target object or adjust alignment of the sensor and projector. The effect of physically translating images that had been pre-compensated for a different projector/sensor alignment was analyzed. We describe the results of a study of the translation and distortion effects, and characterize the expected performance of a testing procedure that requires translation of the pre-compensated images.

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Breck A. Sieglinger, David S. Flynn, George C. Goldsmith II, and Rhoe A. Thompson "An analysis of spatial distortion, calibration, and translation effects for a scene projector", Proc. SPIE 5092, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing VIII, (12 September 2003); https://doi.org/10.1117/12.488451

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KEYWORDS

Projection systems

Distortion

Sensors

Calibration

Error analysis

Cameras

Image sensors

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