Convolution Algorithm in PHP

Kernel_(image_processing) Wikipedia

Operation	Kernel	Image Result g(x,y)
Identity	[0 0 0] [0 1 0] [0 0 0]
Ridge	[0 0 0] [0 1 0] [0 0 0]
Edge Detection	[-1 -1 -1] [-1 8 -1] [-1 -1 -1]
Sharpen	[0 -1 0] [-1 5 -1] [0 -1 0]

Usage

public function __construct($img_path, $kernel) { }
    @param mixed $img_path
    @param mixed $kernel
    @return void

public function convolution($image) { }
    @param mixed $image
    @return array

Example

<?php
$kernel = array(
    array(0, 0, 0),
    array(0, 1, 0),
    array(0, 0, 0),
);
$conv = new convolution("image.png", $kernel);

$conv->createImage(
    "result.png",
    $conv->convolution($conv->r_array),
    $conv->convolution($conv->g_array),
    $conv->convolution($conv->b_array),
    $conv->convolution($conv->a_array)
);