28/02
2017
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library sobel-operator
PHP implementation of Sobel operator (Sobel filter)
qmegas/sobel-operator
PHP implementation of Sobel operator (Sobel filter)
- Tuesday, February 28, 2017
- by qmegas
- Repository
- 1 Watchers
- 0 Stars
- 12 Installations
- PHP
- 0 Dependents
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- 2 Versions
- 100 % Grown
The README.md
Sobel operator
This is Sobel operator (or Sobel filter) implementation on PHP. It used in image processing and computer vision, particularly within edge detection algorithms. Read full article in Wikipedia, (*1)
Installation
composer require qmegas/sobel-operator
Requirements
PHP >= 7.0, (*2)
Usage Examples
<?php
$sobel = new \Qmegas\SobelOperator();
$image = imagecreatefromjpeg('1.jpg');
header('Content-type: image/png');
imagepng($sobel->applyFilter($image));
, (*3)
Options
| Parameter | Description |
|---|---|
flat |
Enables flat mode |
threshold |
Set threshold manually. In case that parameter is not set, algorithm choose threshold automatically |
return_threshold |
Return an array of two elements. First one is an image with Sobel filter applied, second element is value of applied threshold |
<?php
$sobel = new \Qmegas\SobelOperator();
$image = imagecreatefromjpeg('1.jpg');
header('Content-type: image/png');
imagepng($sobel->applyFilter($image, [
'flat' => true,
'threshold' => 30,
]));
, (*4)