Imaging radiometer overlay model for infrared scene synthesis

Jarvis, Donald E.; Gover, Robert E.

doi:10.1117/12.498026

Cited by 2 publications

(1 citation statement)

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“…Within the model, the task of scene synthesis is handled primarily by a resampling and compositing algorithm [2] (referred to as ResCom in Figure 1). In order for this algorithm to function accurately it requires as input the three principal elements of the IR database mentioned previously.…”

Section: Introductionmentioning

confidence: 99%

Efficient radiometrically accurate synthetic representation of IR scenes

Shaw

Gover

2003

Geo-Spatial and Temporal Image and Data Exploitation III

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A technique is developed for synthesizing a high spectral resolution IR ship signature image, for use in an imaging IR Anti-Ship Cruise Missile (ASCM) model, from an IR scene database provided by the ship signature model NTCS/ShipIR. This synthesized IR ship image is generated for use over ranges representative of an ASCM engagement. The technique presented focuses on the application of in-band averaged transmittance to the source ship signature as a means of reducing the spectral calculations required by the cruise missile model. In order to achieve this reduction in computation, while preserving the fidelity of the apparent ship signature, the idea of subbanding is introduced. Sub-banding describes the manner in which the IR band is partitioned into smaller bandwidths, such that the error produced in the ship's average contrast radiance due to the use of in-band averaged transmittance is minimized over range. The difference between the average contrast radiance of an IR ship image generated using in-band averaging and the average contrast radiance of a spectrally generated IR ship image is the metric for this minimization. This choice is based on measured data collected from the recent NATO SIMVEX trial, which used high quality IR measurements of the CFAV Quest in an effort to refine the NTCS/ShipIR model. The technique is general and applicable to any band(s) of interest. Results are presented which verify that the use of inband averaged transmittance over an IR band (3.5-5.0 µm), partitioned using three optimal sub-bands, produces an IR ship image with an average contrast radiance within the desired error bar of a spectrally generated ship image's average contrast radiance.

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Section: Introductionmentioning

confidence: 99%