Leaf Doctor performs quantitative assessments for plant diseases on
plant organs such as leaves. Users collect or submit photographs of
diseased plant organs and calculate the percentage of diseased
tissue. Through a user’s touching of the device screen the
algorithm employs user-specified values for up to eight colors of
healthy tissues in the photograph. The color of each pixel is then
evaluated for its distance from the healthy colors and assigned a
status of either healthy or diseased. Users may slide a threshold
bar until satisfied that diseased tissues are represented
accurately before the percentage calculation. The assessment data
and photographs may be sent by e-mail to any recipients.
Instructions for using the app are provided on the About screen.
The Leaf Doctor was produced by Cornell University and the
University of Hawaii at Manoa College of Tropical Agriculture and
Human Resources.
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