Leaf Doctor vs LeafByte

The 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 the University of Hawaii at Manoa, College of Tropical Agriculture and Human Resources.

LeafByte measures leaf area and herbivory quickly and accurately. Take a picture of a leaf and a scale to measure total leaf area and leaf area consumed. - Saves your data in a convenient spreadsheet on your phone or in Google Drive - Analyzes leaves of almost any size or shape - Uses freehand drawing to reconstruct missing leaf margins - Can measure dark plant material (such as leaves) on a white background or light plant material (such as petals) on a dark background - Reads and records all major barcodes - Automatically corrects skew in photos taken at an angle