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PHP | Gmagick medianfilterimage() Function

Last Updated : 29 Aug, 2019
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The Gmagick::medianfilterimage() function is an inbuilt function in PHP which is used to apply a digital filter that improves the quality of a noisy image. This filter replaces each pixel by the median of its neighboring pixels which is defined by the radius. Syntax:
void Gmagick::medianfilterimage( $radius )
  Parameters: This function accepts a single parameter $radius which is used to hold the radius of the pixel. Return Value: This function returns the Gmagick object with median filter. Errors/Exceptions: This function throws GmagickException on error. Below programs illustrate the Gmagick::medianfilterimage() function in PHP: Program 1: Input Image: php
<?php 
  
// Create a Gmagick object 
$gmagick = new Gmagick(
'https://media.geeksforgeeks.org/wp-content/uploads/tech.png'); 
  
// Use medianfilterimage function 
$gmagick->medianfilterimage(12);

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 medianfilterimage function 
$gmagick->medianfilterimage(12);

// Display the output image 
header("Content-Type: image/png"); 
echo $gmagick->getImageBlob(); 
?> 
Output: Reference: http://php.net/manual/en/gmagick.medianfilterimage.php

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