The function extracts and save .jpeg images for each crown at each date.
Usage
extract_crownsImages(
path_images,
path_crowns,
out_dir_path,
sites = NULL,
dates = NULL,
tempdir_custom = NULL,
N_cores = 1,
width = 720,
height = 825
)Arguments
- path_images
character vector. Path to the target images. Images must be of Geotiff format.
- path_crowns
ccharacter. Path to the crowns polygons file.
- out_dir_path
character. Directory where the outputs are saved.
- sites
character. Name of the site, p.e 'Mbalmayo'.
- dates
character vector. Dates (format of dates should be '%Y-%m-%d', '%Y%m%d' or '%Y_%m_%d').The order should match
path_images.- tempdir_custom
character. Directory where the temporary files are saved.
- N_cores
integer. Number of cores use in the parallelisation proccess.
- width
numeric. The width of the device. Defaut (825)
- height
numeric. The height of the device. Defaut (720)
Details
The extract_crownsImages() create one folder per id and save the images. The folder names are 'crown_the idthe species name' for exemple 'crown_5_Lophira alata'. The the images names are 'crownthe idthe species namethe date.jpeg' for exemple 'crown_5_Lophira alata_2022-11-08.jpeg'. The function upload square image with neighbouring trees and the title is add at the top, image size is 720*825 pixels by defaut. The image size can be changed by specifying height and width parameters.
Examples
if (FALSE) { # \dontrun{
imgs = list.files('my-path-to-images', full.names = T)
path_crowns = "my-path-to-crowns-shapefile"
out_dir_path = "output-directory"
extract_crownsImages(
path_images = imgs,
path_crowns = path_crowns,
out_dir_path = out_dir_path
)
} # }