PHP | Gmagick spreadimage() Function

The Gmagick::spreadimage() function is an inbuilt function in PHP which is used to randomly displaces each pixel in a block defined by the variable.

Syntax:

Gmagick Gmagick::spreadimage( $radius )

Parameters: This function accepts a single parameter $radius which chooses a random pixel in a neighborhood of this extent.

Return Value: This function returns Gmagick object on success.

Errors/Exceptions: This function throws GmagickException on error.

Below programs illustrates the Gmagick::spreadimage() function in PHP:

Program 1:
Input Image:

<?php

// Create a Gmagick object
$gmagick = new Gmagick(
'https://media.geeksforgeeks.org/wp-content/uploads/tech.png');

// spread the image.
$gmagick->spreadimage(10);

header('Content-type: image/png');

// Output the image
echo $gmagick;
?>

Output:

Program 2:

<?php

// Create a GmagickDraw object
$draw = new GmagickDraw();

// Create GmagickPixel object
$strokeColor = new GmagickPixel('Red');
$fillColor = new GmagickPixel('Green');

// Set the color, opacity of image
$draw->setStrokeOpacity(1);
$draw->setStrokeColor('Red');
$draw->setFillColor('Green');

// Set the width and height of image
$draw->setStrokeWidth(7);
$draw->setFontSize(72);

// Function to draw circle
$draw->circle(250, 250, 100, 150);

$gmagick = new Gmagick();
$gmagick->newImage(500, 500, 'White');
$gmagick->setImageFormat("png");
$gmagick->drawImage($draw);

// Spread the image
$gmagick->spreadimage(25);

// Display the output image
header("Content-Type: image/png");
echo $gmagick->getImageBlob();
?>

Output:

Reference: http://php.net/manual/en/gmagick.spreadimage.php