read_image: Imports and transforms a jpg or tiff file.

Description

Imports an image file (in JPEG or TIFF format) into an array, and converts the original R, G and B values in the file into proportions (r, g and b variables).

Usage

read_image(file_name)
is.transformed_image(x)
# S3 method for pixel_transformed_image
summary(object, ...)

Value

Returns an object of class "pixel_transformed_image", which is an array of dimensions r x c x 3, being r and c

the number of rows and columns in the image. The last dimension corresponds to the original R, G and B variables (= bands) that define the colours of the pixels. The values in the array are the proportions of each colour (r, g, b), i.e. r = R / (R + G + B), and so on.

Arguments

file_name: A character string containing the name of the image file.
x: the R object being tested
object: an object of class "pixel_transformed_image".
...: other parameters passed to the function.

Details

This function calls the functions jpeg::readJPEG() or tiff::readTIFF() to import the image into an R array. Then it transforms the data into proportions

Examples

Run this code


# An example that loads the example file included in the package
ivy_oak_rgb <- read_image(system.file("extdata", "IvyOak400x300.JPG",
                                       package = "pixelclasser"))