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. There are many ways to directly contrast the adjacent brightness.

Instructions:

Install

composer require lizhichao/one-img

Example

$img_path = '1.jpg';
$img = new \OneImg\Border();
$img->setImg($img_path)
    ->scale(300, 300)
    ->outline()
    ->save(); //Output to browser

effect

Code warehouse

https://github.com/lizhichao/doImg

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