Numerical quantization effects in KHILS projection systems

Details Numerical quantization effects in KHILS projection systems Numerical quantization effects in KHILS projection systems

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4717..148f&link_type=abstract

Proc. SPIE Vol. 4717, p. 148-161, Technologies for Synthetic Environments: Hardware-in-the-Loop Testing VII, Robert Lee Murrer;

Physics

Scientific paper

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.

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