Purdue University Graduate School
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Plant Wilting Estimation And Field-Based Plot Extraction

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posted on 2023-10-06, 12:57 authored by Changye YangChangye Yang

Plant phenotyping is the process of characterization and quantification of physical traits
of plants such as height, leaf area, biomass, wilting degree, or flowering time. Many plants
become limp or droop through heat, loss of water, or disease. This is also known as wilting.
In this thesis, we propose multiple quantifiable wilting metrics that will be useful in studying
bacterial wilt and identifying resistance genes. In order to obtain the wilting metrics, we use
machine learning methods to identify the center of the stem. We also propose a fast ground
truthing method to speed up training data generation. We test our metrics on both tomato
plants and soybean plants with wilting caused by either bacteria or drought. We successfully
demonstrated that our metrics are effective at estimating wilting in plants.

Field experiments often comprise thousands of plants. For many Unmanned Aerial Vehi-
cles (UAVs) image-based plant phenotyping analyses, we need to examine smaller groups of
plants known as ”plots”. We propose a method to extract plots from images acquired from
UAVs. In addition, we proposed a system that will allow us to combine our plot extraction
results with field data such as plant ID, plant genotype, and experiment type provided by
the planters. We also developed a method to generate synthetic plant center location data.


Degree Type

  • Doctor of Philosophy


  • Electrical and Computer Engineering

Campus location

  • West Lafayette

Advisor/Supervisor/Committee Chair

Edward J. Delp

Additional Committee Member 2

Fenging M. Zhu

Additional Committee Member 3

Melba M. Crawford

Additional Committee Member 4

Mary Comer

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