PHP | Gmagick blurimage() Function

The Gmagick::blurimage() function is an inbuilt function in PHP which is used to add blur filter to the image. 

Syntax:

Gmagick Gmagick::blurimage( $radius, $sigma, $channel )

Parameters: This function accepts three parameters as mentioned above and described below:

• $radius: This parameter is used to set blur radius in an image.
• $sigma: It sets the standard deviation.
• $channel: This parameter set the channel type constant. If it is not supplied then all channels are blurred.

Return Value: This function returns True on success. 

Errors/Exceptions: This function throws GmagickException on error. Below programs illustrates the Gmagick::blurimage() function in PHP: 

Original Image:

Program 1:

php

<?php

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

// Use blurimage() function
$gmagick->blurimage(7, 8);

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

// Output the image
echo $gmagick;
?>

Output:

Program 2:

php

<?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);

// Use blurimage() function
$gmagick->blurimage(7, 5);

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

Output:

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