Chapter 13 Phenology
Phenopix is an R package which allows the user to extract visual information from time lapse images. It provides a quantitative daily measure of vegetation phenology at each site (e.g. green-up, senescence, snow cover)
The Phenopix package has a five step process: i) a region of interest (ROI) is identified; ii) the red, green, and blue digital numbers from each image in the timeseries is extracted and an index of relative ‘greenness’ is computed and plotted from the digital numbers; iii) the vegetation indices’ data points are filtered to remove inconsistencies; iv) a curve is fit to the data and phenophases are determined from the curve; v) and phenophase uncertainties are calculated.
13.1 Worked example
Coming soon. Check the wildCo github page for updates