Plant Phenomics / 2019 / Article / Tab 2

Research Article

instaGraminoid, a Novel Colorimetric Method to Assess Herbicide Resistance, Identifies Patterns of Cross-Resistance in Annual Ryegrass

Table 2

Plant health metrics derived from photographs of above-ground tissues of Lolium rigidum plants.

MetricDescription

leaf area visible from one angle (1 angle: 1 technical replicate)
mean pixel value in the blue channel (range 0-255)
mean pixel value in the green channel (range 0-255)
mean pixel value in the red channel (range 0-255)
median pixel value in the blue channel
median pixel value in the green channel
median pixel value in the red channel
GREEN_INDEX
GREEN_FRACTION
density-derived frequency of blue pixel values between 0 and 25
density-derived frequency of green pixel values between 100 and 125
density-derived frequency of red pixel values between 66 and 80
proportion of green pixel values greater than 100
number of green pixel values greater than 100 divided by the number of green pixel values less than 100
proportion of red pixel values greater than 150
number of red pixel values greater than 150 divided by the number of green pixel values less than 150
change in the above metric values between two measurement times, i.e., Day 14-Day 7, Day 14-Day 0, and Day 7-Day 0