PHP | Gmagick despeckleimage() Function

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The Gmagick::despeckleimage() function is an inbuilt function in PHP which is used to reduce the speckle noise in an image while preserving the edges of the original image.

Syntax:

Gmagick Gmagick::despeckleimage( void )

Parameters: This function doesn’t accept any parameter.

Return Value: This function returns a Gmagick object on success.

Exceptions: This function throws GmagickException on error.

Used Image: To capture the canvas area.

Below given programs illustrate the Gmagick::despeckleimage() function in PHP:

Program 1:

<?php 
  
// Create a new Gmagick object 
$gmagick = new Gmagick('zambiatekgnoised.png'); 
  
// Apply the despeckle function 
$gmagicknew = $gmagick->despeckleimage(); 
  
// Output the image 
header('Content-type: image/png'); 
echo $gmagicknew; 
?> 

Output:

Program 2:

<?php 
  
// Create a new Gmagick object 
$gmagick = new Gmagick('./zambiateknoised.png'); 
  
// Get the image histogram 
$pixels = $gmagick->getimagehistogram(); 
  
echo "Color of 100th pixel before removing noise: "; 
echo $pixels[99]->getcolor(); 
  
// Apply the despeckle function 
$gmagicknew = $gmagick->despeckleimage(); 
  
// Get the image histogram 
$pixels = $gmagick->getimagehistogram(); 
  
echo "<br>Color of 100th pixel after removing noise: "; 
echo $pixels[99]->getcolor(); 
?> 

Output:

Color of 100th pixel before removing noise: rgb(0, 6682, 8995)
Color of 100th pixel after removing noise: rgb(3084, 5397, 7967)

Reference: https://www.php.net/manual/en/gmagick.despeckleimage.php

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