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Smart fLAIr

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(1)

Jan Bauer

1

, Bastian Siegmann

2

, Thomas Jarmer

2

, Nils Aschenbruck

1

Institute of Computer Science, University of Osnabrück, Germany

1Distributed Systems, 2Remote Sensing and Digital Image Processing

Smart fLAIr

a Smart App for Fast Leaf Area Index Retrieval

(2)

Leaf Area Index (LAI) in agricultural context

• parameter describing photosynthetic performance and vital condition of plants

• key variable in various models, e.g. yield models

indicator for yield-reducing processes

𝐿𝐴𝐼 = (one−sided) green leaf area ground surface area A little bit of Motivation: Crop Monitoring for Smart Farming

LAI = 0 LAI = 1 LAI = 3

(3)

Basic Concept: Smart fLAIr in a Nutshell

Methodology

• radiation-based LAI estimation

• Ambient Light Sensor (ALS)

• above (A) + below (B) canopy light measurements

à LAI derived from light transmittance (Monsi and Saeki, 1953) 𝐿𝐴𝐼 = −𝜔 ∗ 𝑙𝑛 𝐵;

𝐴̅

LAI = 0 LAI = 1 LAI = 3

(4)

Add-ons: Some Features of Smart fLAIr

Special Features

(optional)

• selfie stick operation

• sensor accessory: diffuser and optical filter cap

• WSN connectivity (via USB or Bluetooth)

(5)

Video Demo: Smart fLAIr in the wild

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Thank you for your attention!

Maize field EVALUATION:

LICOR LAI-2200 Comparison

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Y = 1.202x + 0.013

r2 = 0.95 RMSE = 0.25 n = 66

LAI (LAI-2200)

Campaign 2 Campaign 3

sys.cs.uos.de

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