remove-black
v1.0.0
Published
replace black background with a transparent background
Downloads
421
Readme
Remove black
Replace black background with a transparent background
npm install remove-blackexample
<script src="../dist/removeblack.js"></script>
<script>
new Promise((resolve) => (window.onload = resolve)).then(() => {
const canvas = document.createElement("canvas");
canvas.style.background = "red";
document.body.appendChild(canvas);
const img = document.getElementById("source");
[canvas.width, canvas.height] = [img.width, img.height];
const ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
const imgData = ctx.getImageData(0, 0, img.width, img.height);
const data = removeBlack(imgData.data, img.width, img.height);
ctx.putImageData(new ImageData(data, img.width, img.height), 0, 0);
});
</script>
<body>
<img src="..." />
</body>