Detecting Chemical Drift Damages on Water Hemp Using RGB Images from Mobile Phone

Thirawat Bureetes

What Is Chemical Drift?

What Is Chemical Drift?

An unintentional movement of the pesticide or herbicide droplets outside of the intended application area

What Does Chemical Drift Impact To Crops?

What Does Chemical Drift Impact To Crops?

  • Reducing yield
  • Kill the crops

What Can We Do?

What Can We Do?

Detecting the sign of damange as early as possible

What Can We Do?

Detecting the sign of damange as early as possible


How?

How?

Leaf Images + Machine Learning

  • Hyperspectral images ✔️ 💵
  • Multispectral images ✔️ 💵
  • RGB images 🤳

Materials

Materials

$199 Samsung Galexy A14

Water hemps

6 types of herbicide

Materials

$199 Samsung Galexy A14

16 x 7 = 112 Water hemps

6 types of herbicide

6 types of herbicide

  • 2,4D
  • Dicamba
  • Atrazine
  • Flumioxazin
  • Mesotrione
  • Norflurazon

Data Collection Method

Data Collection Method

4 days after applying herbicide

1 leaf per sample (top mature leaf)

24-D
24-D
Dicamba
Dicamba
Atrazine
Atrazine
Flumioxazin
Flumioxazin
Mesotrione
Mesotrione
Norflurazon
Norflurazon

Feature Extraction

Raw
Processed

3 sections: base, mid, and top

2 sets of features: color and texture

396 features

ML Traning Method

ML Traning Method

Cross Validation

Randomly select 2 leaves/group as validation samples

5,000 rounds

Classification algorithms

  • Support vector machine
  • K-nearest neighbors
  • Gaussian naïve Bayes
  • Decision tree
  • Random forest 👑

Result

result

Key Findings

Key Findings

Overall classification performance ~ 66%

Group F, M, and N performance > 80% , FN rate 0.5%

The remaining groups performance ~ 50%

Detecting herbicide rate is 85%

Thank you