Reading png as a N x 3 matrix in R

Question

I would like to read a simple black/white picture in png format into R. I need 3 information for each pixel, the x, y coordinates and color information(0 for white, 1 for black).

I need this information to run a function that checks if there are any closed white elements in the picture or not.

Any tips will be more than welcome. Thanks!

Answer 1

This appears to be almost trivial if you have imager package installed. The color numbers here are inverted, but you should be able to change this without a problem.

library(imager)

xy <- load.image("vds9S.png")
head(as.data.frame(xy))

  x y value
1 1 1     1
2 2 1     1
3 3 1     1
4 4 1     1
5 5 1     1
6 6 1     1