Support multiple channels

Question

Support multiple channels

Closed this issue 9 years ago · 2 comments

Most 'photo-style' grayscale filters use luminance or another factor rather than a mean of all bands.

Answer 1 · 2013-03-28T13:45:10.000Z

I... don't understand this. I used a line from OpenLayers example, which uses l = 0.325 * r + 0.5 * g + 0.125 * b formula. Are you suggesting that canvas' pixels aren't always rgba?

Answer 2 · 2013-03-28T14:50:35.000Z

For a future reference, a slashdot article on the subject with different coefficients.