grayscale static method
(0.2126 * color.red + 0.7152 * color.green + 0.0722 * color.blue)
Implementation
static List<double> grayscale() {
return <double>[
0.2126,
0.7152,
0.0722,
0,
0,
0.2126,
0.7152,
0.0722,
0,
0,
0.2126,
0.7152,
0.0722,
0,
0,
0,
0,
0,
1,
0,
];
}