This function takes an image and augments it by rotating it multiple times.
Usage
image_augment(
img,
pattern = NULL,
times = 12,
type = "export",
dir_original = NULL,
dir_processed = NULL,
parallel = FALSE,
verbose = TRUE,
workers = NULL
)Arguments
- img
An
Imageobject.- pattern
A regular expression pattern to select multiple images from a directory.
- times
The number of times to rotate the image.
- type
The type of output: "export" to save images or "return" to return a list of augmented images.
- dir_original
The directory where original images are located.
- dir_processed
The directory where processed images will be saved.
- parallel
Whether to perform image augmentation in parallel.
- verbose
Whether to display progress messages.
- workers
A positive numeric scalar or a function specifying the number of parallel processes that can be active at the same time. By default, the number of sections is set up to 30% of available cores.
Value
If type is "export," augmented images are saved. If type is "return," a list of augmented images is returned.
Examples
if (interactive() && requireNamespace("EBImage")) {
library(pliman)
img <- image_pliman("sev_leaf.jpg")
imgs <- image_augment(img, type = "return", times = 4)
image_combine(imgs)
}