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PHP | Gmagick blurimage() Function

Last Updated : 10 Apr, 2023
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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


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