read_data {deforestable}

Import a jpeg image

Description

All these functions are made to read jpeg images, the difference is in the class of objects they return

Usage

read_data(filename, dir)

read_data_matrix(filename, dir)

read_data_raster(filename, dir)

Arguments

filename

name of the jpeg file to import

dir

the directory where the image is located

Value

read_data returns a 3-column data.frame with pixels in rows and red, green, blue intensities in columns. read_data_matrix reads jpeg images and returns 3 matrices for each of red, green and blue colors. read_data_raster imports jpeg as a raster object rast.

Functions

• read_data_matrix(): returns three matrices

• read_data_raster(): returns a SpatRaster object

Examples

dir <- system.file('extdata/Forest/', package = "deforestable")

dd <- read_data(filename='_6_33_.jpeg', dir=dir)
hist(dd[,1])


dir <- system.file('extdata/Forest/', package = "deforestable")

dd <- read_data_matrix(filename='_6_33_.jpeg', dir=dir)


dir <- system.file('extdata/Forest/', package = "deforestable")

dd<-read_data_raster(filename='_8_46_.jpeg', dir=dir)