#! /usr/bin/python3
# Last edited on 2025-08-20 07:13:36 by stolfi

# Reads a TIFF file produced by the multispectral scanning team.
# Writes to stdout the samples as a plain (ASCII, not binary) PGM file.

import tifffile as tiff
import sys


def main():
  fname = sys.argv[1];

  a = tiff.imread(fname)
  assert len(a.shape) == 2, f"should be monchrome, shape = {a.shape}"
  rows, cols = a.shape;
  assert a.dtype == 'uint16', f"bad dtype {a.dtype}"
  sys.stdout.write("P2\n")
  sys.stdout.write(f"{cols} {rows}\n")
  sys.stdout.write("65535\n")
  for row in range(rows):
    for col in range(cols):
      sys.stdout.write(f" {a[row,col]}\n")
  sys.stdout.flush()
  return 0

main()