I need it because I use blurhashes as image holders, but in a part of my application I need to display images in black and white. Thanks in advance
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EDIT
I managed to arrive at a code like this. the problem is that the blurhashes seem stretched and deformed compared to the originals
const WIDTH = 30;
const ASPECT_RATIO = validationConfig.media.profilePicture.aspectRatio;
const HEIGHT = Math.floor(WIDTH / ASPECT_RATIO);
export function convertBlurhashToGreyscale(blurhash: string) {
const pixels = decode(blurhash, WIDTH, HEIGHT);
for (let i = 0; i < pixels.length; i += 4) {
const grayValue = Math.round(
(pixels[i] + pixels[i + 1] + pixels[i + 2]) / 3
);
pixels[i] = grayValue;
pixels[i + 1] = grayValue;
pixels[i + 2] = grayValue;
pixels[i + 3] = 255; // Imposta l'opacità a 255
}
const newHeight = Math.floor(WIDTH / ASPECT_RATIO);
return encode(pixels, WIDTH, newHeight, 4, 3);
}
