detect-edges

Smartly detect edges of an image.

Installation

npm install detect-edges

Usage

import detect from "detect-edges";

// Browser
const canvas = document.createElement("canvas");

// Node
import Canvas from "canvas";
const canvas = Canvas.createCanvas(800, 600);

const context = canvas.getContext("2d");
// Edit the canvas' context
// ...

const { left, top, right, bottom } = detect(canvas);

Documentation

detect(canvas, [options])

| Name | Type | Default | Comment | |---------|---------------------|----------|------------------------| | canvas | HTMLCanvasElement | required | Tainted canvas element | | options | Options | | see below |

options

| Name | Type | Default | Comment | |-----------|----------|---------|----------------------------------------------------------------------------------------------------------------------------| | tolerance | Number | 0 | Level of tolerance for the transparency between 0 and 1 (0 mean no tolerance, 1 mean everything is treated as transparent) |

Related

• If you want to crop an image in Node.js, use crop-node
• If you want to crop an image using your terminal, use crop-node-cli
• If you want to crop an image in the browser, use crop-browser

License

MIT