Overview

Technical FAQ

PHP Manual

PHP Joomla
Development

Learn PHP

Imagick::brightnessContrastImage	Imagick::chopImage

Imagick	Last updated: Mon, 26 Oct 2026

Imagick::charcoalImage

(PECL imagick 2, PECL imagick 3)

Imagick::charcoalImage — Simulates a charcoal drawing

Description

public function Imagick::charcoalImage(float $radius, float $sigma): bool

Simulates a charcoal drawing.

Parameters

radius: The radius of the Gaussian, in pixels, not counting the center pixel
sigma: The standard deviation of the Gaussian, in pixels

Return Values

Returns true on success.

Examples

Example #1 Imagick::charcoalImage()

<?php
function charcoalImage($imagePath, $radius, $sigma) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->charcoalImage($radius, $sigma);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

Imagick::brightnessContrastImage	Imagick::chopImage

Imagick	Last updated: Mon, 26 Oct 2026