A simple image edge detection method

A simple image edge detection method
General steps:
  • Zoom pictures to improve efficiency
  • Picture grayscale
  • 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
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    A simple image edge detection method