konva
Version:
HTML5 2d canvas library.
15 lines (14 loc) • 419 B
JavaScript
export const Solarize = function (imageData) {
const threshold = 128;
const d = imageData.data;
for (let i = 0; i < d.length; i += 4) {
const r = d[i], g = d[i + 1], b = d[i + 2];
const L = 0.2126 * r + 0.7152 * g + 0.0722 * b;
if (L >= threshold) {
d[i] = 255 - r;
d[i + 1] = 255 - g;
d[i + 2] = 255 - b;
}
}
return imageData;
};