Digital imaging and remote sensing image generator (DIRSIG) as applied to NVESD sensor performance modeling

Kolb, Kimberly; Choi, Hee-Sue; Kaur, Bhavneet; Olson, Jeffrey T.; Hill, Clayton F.; Hutchinson, James A.

doi:10.1117/12.2224006

Cited by 3 publications

(1 citation statement)

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“…It is also an important way to analyze the characteristics of a target in specific circumstances. Over the last two decades, digital simulation has become the major approach to simulating hyperspectral imaging along the sun–target–observer image chain [1,2,3,4]. In the process of digital simulation, solar irradiance, skylight, and reflected background radiance are considered to illuminate the target.…”

Section: Introductionmentioning

confidence: 99%

A “Skylight” Simulator for HWIL Simulation of Hyperspectral Remote Sensing

Zhao

Cui

Jia

et al. 2017

Sensors

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Even though digital simulation technology has been widely used in the last two decades, hardware-in-the-loop (HWIL) simulation is still an indispensable method for spectral uncertainty research of ground targets. However, previous facilities mainly focus on the simulation of panchromatic imaging. Therefore, neither the spectral nor the spatial performance is enough for hyperspectral simulation. To improve the accuracy of illumination simulation, a new dome-like skylight simulator is designed and developed to fit the spatial distribution and spectral characteristics of a real skylight for the wavelength from 350 nm to 2500 nm. The simulator's performance was tested using a spectroradiometer with different accessories. The spatial uniformity is greater than 0.91. The spectral mismatch decreases to 1/243 of the spectral mismatch of the Imagery Simulation Facility (ISF). The spatial distribution of radiance can be adjusted, and the accuracy of the adjustment is greater than 0.895. The ability of the skylight simulator is also demonstrated by comparing radiometric quantities measured in the skylight simulator with those in a real skylight in Beijing.

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