This function transforms an array of RGB absolute values into a similar array containing the proportion of each band (= colour variable): r g and b.
transform_colours(image_array)
Returns an array of class transformed_image
containing the
proportions of each colour variable in the pixels of the image. The third
dimension of the array is named "bands" and its elements are labelled as
"r", "g" and "b", respectively.
an array of class image_array
created by function
read_image()
.
The proportions are calculated as r
= R
/ (R + G
+ B
), and so on. It is used by function read_image().