Radiometric and Atmospheric Corrections of Multispectral mu MCA Camera for UAV Spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F19%3A00519761" target="_blank" >RIV/86652079:_____/19:00519761 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2072-4292/11/20/2428" target="_blank" >https://www.mdpi.com/2072-4292/11/20/2428</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/rs11202428" target="_blank" >10.3390/rs11202428</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Radiometric and Atmospheric Corrections of Multispectral mu MCA Camera for UAV Spectroscopy

Popis výsledku v původním jazyce

This study presents a complex empirical image-based radiometric calibration method for a Tetracam mu MCA multispectral frame camera. The workflow is based on a laboratory investigation of the camera's radiometric properties combined with vicarious atmospheric correction using an empirical line. The effect of the correction is demonstrated on out-of-laboratory field campaign data. The dark signal noise behaviour was investigated based on the exposure time and ambient temperature. The vignette effect coupled with nonuniform quantum efficiency was studied with respect to changing exposure times and illuminations to simulate field campaign conditions. The efficiency of the proposed correction workflow was validated by comparing the reflectance values that were extracted from a fully corrected image and the raw data of the reference spectroscopy measurement using three control targets. The Normalized Root Mean Square Errors (NRMSE) of all separate bands ranged from 0.24 to 2.10%, resulting in a significant improvement of the NRMSE compared to the raw data. The results of a field experiment demonstrated that the proposed correction workflow significantly improves the quality of multispectral imagery. The workflow was designed to be applicable to the out-of-laboratory conditions of UAV imaging campaigns in variable natural conditions and other types of multiarray imaging systems.

Název v anglickém jazyce

Radiometric and Atmospheric Corrections of Multispectral mu MCA Camera for UAV Spectroscopy

Popis výsledku anglicky

This study presents a complex empirical image-based radiometric calibration method for a Tetracam mu MCA multispectral frame camera. The workflow is based on a laboratory investigation of the camera's radiometric properties combined with vicarious atmospheric correction using an empirical line. The effect of the correction is demonstrated on out-of-laboratory field campaign data. The dark signal noise behaviour was investigated based on the exposure time and ambient temperature. The vignette effect coupled with nonuniform quantum efficiency was studied with respect to changing exposure times and illuminations to simulate field campaign conditions. The efficiency of the proposed correction workflow was validated by comparing the reflectance values that were extracted from a fully corrected image and the raw data of the reference spectroscopy measurement using three control targets. The Normalized Root Mean Square Errors (NRMSE) of all separate bands ranged from 0.24 to 2.10%, resulting in a significant improvement of the NRMSE compared to the raw data. The results of a field experiment demonstrated that the proposed correction workflow significantly improves the quality of multispectral imagery. The workflow was designed to be applicable to the out-of-laboratory conditions of UAV imaging campaigns in variable natural conditions and other types of multiarray imaging systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20705 - Remote sensing

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Remote Sensing

ISSN

2072-4292

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

31

Strana od-do

2428

Kód UT WoS článku

000498395800096

EID výsledku v databázi Scopus

2-s2.0-85074195868