Bogner, C; Kühnel, A; Huwe, B: Predicting with limited data - Increasing the accuracy in VIS-NIR diffuse reflectance spectroscopy by SMOTE, Proc. 6th IEEE Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS) (2014)
Abstract:

Diffuse reflectance spectroscopy is a powerful technique to predict soil properties. It can be used in situ to provide data inexpensively and rapidly compared to the standard laboratory measurements. Because most spectral data bases contain air-dried samples scanned in the laboratory, field spectra acquired in situ are either absent or rare in calibration data sets. However, when models are calibrated on air-dried spectra, prediction using field spectra are often inaccurate. We propose a framework to calibrate partial least squares models when field spectra are rare using synthetic minority oversampling technique (SMOTE). We calibrated a model to predict soil organic carbon content using air-dried spectra spiked with synthetic field spectra. The root mean-squared error of prediction decreased from 6.18 to 2.12 mg/g and R² increased from -0.53 to 0.82 compared to the model calibrated on air-dried spectra only.

Upcoming ...
Ökologisch-Botanischer Garten:
Sa. 2018-07-21
UNIKAT - Das Sommer- und Tanzevent der Universität im Ökologisch-Botanischen Garten, Tickets unter: www.unikat.uni-bayreuth.de
Su. 2018-07-22
Literatur und Musik: Serenade am Victoria-Becken
We. 2018-07-25
Vom Korn zum Brot: Öffentliche Brotprüfung der Bäckerinnung Bayreuth Stadt und Land
We. 2018-07-25
Unser täglich Brot: Getreide und Pseudocerealien
Su. 2018-08-05
Heitere Botanik: Pflanzen in Versen von K.H. Waggerl
Weather research site
Luftdruck (356m): 969.8 hPa
Lufttemperatur: 17.4 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: 10 h/d
Wind (Höhe 17m): 5.6 km/h
Wind (Max.): 9.0 km/h
Windrichtung: SW

...more
Globalstrahlung: 0 W/m²
Lufttemperatur: 16.1 °C
Niederschlag: 2.5 mm/24h
Sonnenschein: 9 h/d
Wind (Höhe 32m): 6.6 km/h
Wind (Max.): 17.5 km/h

...more
This site makes use of cookies More information