Function detectBackgroundColor

web/js/main.js:424–430

(imageData)

}

function detectBackgroundColor(imageData) {
    const d = imageData.data;
    const corners = [0, (imageData.width-1)*4, (imageData.height-1)*imageData.width*4, d.length-4];
    let r=0, g=0, b=0, a=0;
    corners.forEach(i => { r+=d[i]; g+=d[i+1]; b+=d[i+2]; a+=d[i+3]; });
    return [Math.round(r/4), Math.round(g/4), Math.round(b/4), Math.round(a/4)];
}

function removeAntiAliasing(imageData, bg, threshold = 30) {
    const d = imageData.data;