The capacity to capture images using RGB silicon-based sensors in the visible (VIS) can be limited in outdoor environmental conditions. Due to illumination variations of the scene or scattering effects caused by the interaction of light with micrometer-size particles in the rain, fog, or smoke, limiting the depth of visibility and the level of contrast of the image. In vision applications, where there is dependence on the vision systems such as UAVs or autonomous vehicles for navigation, this reduction in the sensor's performance is critical. A solution uses a hyperspectral vision system that can operate in the different spectral bands in the near-infrared range. This spectral band has fewer light attenuation effects due to operating in the Mie regime. The size of the scattering particles is comparable to the used illumination wavelengths. In this work, we propose a vision system based on NIR active illumination single-pixel imaging (SPI) with time-of-flight (ToF) wavelengths of 850 and 1550 nm for 2D image reconstruction under rainy or fog conditions.
Hyperspectral camera based on Near-Infrared Single-Pixel Imaging
Actualizado: 16 dic 2022
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