read_image: Imports a jpg or tiff file.
In CarlosRealR/pixelclasser: Classifies Image Pixels by Colour

Description Usage Arguments Details Value See Also Examples

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).

1	read_image(file_name)

file_name

A character string containing the name of the image file.

This function calls the functions readJPEG() and readTIFF() in packages jpeg and tiff to import the data into an R array. Then it transforms the data into proportions

Returns an array of dimensions r x c x 3 and class transformed_image, being r and c the number of rows and columns in the image. The last dimension corresponds to the 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.

For more information about jpeg and tiff file formats, see the help pages of readJPEG and readTIFF functions in packages jpeg and tiff, respectively.

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