php implements a simple image edge detection

A simple image edge detection method

General steps:

1. Zoom pictures to improve efficiency
2. Picture grayscale
3. Calculate edges based on brightness

The third step is the most critical. Many methods are used here to directly contrast the adjacent brightness.

Instructions:

installation

composer require lizhichao/one-img

use

$img_path = '1.jpg';
$img = new \OneImg\Border();
$img->setImg($img_path)
    ->scale(300, 300)
    ->outline()
    ->save(); //输出到浏览器

effect

Code warehouse

https://github.com/lizhichao/doImg

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