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Open AccessArticle

Radiometric Calibration of UAV Remote Sensing Image with Spectral Angle Constraint

1
School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China
2
China Centre for Resources Satellite Data and Application, Beijing 100094, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(11), 1291; https://doi.org/10.3390/rs11111291
Received: 11 April 2019 / Revised: 22 May 2019 / Accepted: 25 May 2019 / Published: 30 May 2019
(This article belongs to the Section Remote Sensing Image Processing)
In recent years, the acquisition of high-resolution multi-spectral images by unmanned aerial vehicles (UAV) for quantitative remote sensing research has attracted more and more attention, and radiometric calibration is the premise and key to the quantification of remote sensing information. The traditional empirical linear method independently calibrates each channel, ignoring the correlation between spectral bands. However, the correlation between spectral bands is very valuable information, which becomes more prominent as the number of spectral channels increases. Based on the empirical linear method, this paper introduces the constraint condition of spectral angle, and makes full use of the information of each band for radiometric calibration. The results show that, compared with the empirical linear method, the proposed method can effectively improve the accuracy of radiometric calibration, with the improvement range of Mean Relative Percent Error (MRPE) being more than 3% in the range of visible band and within 1% in the range of near-infrared band. Besides, the method has great advantages in agricultural remote sensing quantitative inversion. View Full-Text
Keywords: radiometric calibration; quantitative remote sensing; unmanned aerial vehicles (UAV); empirical linear method; spectral angle radiometric calibration; quantitative remote sensing; unmanned aerial vehicles (UAV); empirical linear method; spectral angle
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MDPI and ACS Style

Xu, K.; Gong, Y.; Fang, S.; Wang, K.; Lin, Z.; Wang, F. Radiometric Calibration of UAV Remote Sensing Image with Spectral Angle Constraint. Remote Sens. 2019, 11, 1291.

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