Numerical quantization effects in KHILS projection systems

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

doi:10.1117/12.474715

12 July 2002 Numerical quantization effects in KHILS projection systems

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

Proceedings Volume 4717, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing VII; (2002) https://doi.org/10.1117/12.474715
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

The Honeywell resistor arrays produce radiance outputs, which are observed to have a strong non-linear dependence on the voltage out of the digital-to-analog-converters (DACs). In order for the projection system to run in a radiometrically calibrated mode, the radiances in the image generator must be transformed with exactly the inverse of the resistor array response function before they are sent to the DACs. Representing the image values out of the image generator and the values into the DACs with quantized, digital values introduces errors in the radiance out of the resistor array. Given the functional form of the emitter array response and the number of bits used to represent the image values, these errors in the radiometric output due to the quantization effects can be calculated. This paper describes the calculations and presents results for WISP, MSSP, and the new extended range and standard range BRITE II arrays.

Citation Download Citation

David S. Flynn, Rhoe A. Thompson, and George C. Goldsmith II "Numerical quantization effects in KHILS projection systems", Proc. SPIE 4717, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing VII, (12 July 2002); https://doi.org/10.1117/12.474715

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