File: weave-green

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pypng 0.0.20%2Bds-3
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#!/bin/sh

PATH=${PWD%code*}code:$PATH

# Extract Green channel as greyscale image

python -m pngsuite basi2c08 |
  priweavepng -c 2 - | pripnglsch | grep IHDR |
  grep -q 00000020000000200800000000