Scale an image raster array to a small number of pixels. Process into a data frame. Internal function.

Scale an image raster array to a small number of pixels. Process into a data frame. Internal function.

Arguments

image	A raster array from an image.
img_size	Size of output image in pixel, where one pixel = one 'brick'. Use a single value (e.g. 48) for a square image with 48 pixels on each side. Use an array of two values for a rectangular image c(width, height).
brightness	A value >1 will increase the brightness of the image while a positive value <1 will decrease the brightness.
warhol	Array of values c(1, 2, 3) associated with R, G, B color channels. Swap values in array to swap color channels for a fun visual effect.

Value

A list with element Img_scaled containing a data frame of the x- & y-coordinates, R, G, B channels, and hex color of each brick (pixel).