期刊
REMOTE SENSING
卷 14, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/rs14051152
关键词
hyperspectral; smartphone; low cost; environmental monitoring; field deployable; portable; calibration
类别
资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/V012126/1, EP/R513313/1]
This article introduces a new method to improve the utility of portable hyperspectral imaging instruments by correcting spatial distortions, performing spectral calibration, and removing biases, allowing low-skilled operators to use low-cost hyperspectral imagers for applications in agriculture and environmental monitoring.
Developments in the portability of low-cost hyperspectral imaging instruments translate to significant benefits to agricultural industries and environmental monitoring applications. These advances can be further explicated by removing the need for complex post-processing and calibration. We propose a method for substantially increasing the utility of portable hyperspectral imaging. Vertical and horizontal spatial distortions introduced into images by 'operator shake' are corrected by an in-scene reference card with two spatial references. In situ light-source-independent spectral calibration is performed. This is achieved by a comparison of the ground-truth spectral reflectance of an in-scene red-green-blue target to the uncalibrated output of the hyperspectral data. Finally, bias introduced into the hyperspectral images due to the non-flat spectral output of the illumination is removed. This allows for low-skilled operation of a truly handheld, low-cost hyperspectral imager for agriculture, environmental monitoring, or other visible hyperspectral imaging applications.
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