PHP | Imagick uniqueImageColors() Function

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The Imagick::uniqueImageColors() function is an inbuilt function in PHP which is used to discards all but one of any pixel color. This function is available in version 6.2.9 or newer.

Syntax:

bool Imagick::uniqueImageColors( void )

Parameters: This function does not accepts any parameters.

Return Value: This function returns True on success.

Below program illustrates the Imagick::uniqueImageColors() function in PHP:

Program:

<?php 
  
// Create an Imagick object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/zambiatek-9.png'); 
  
// Reduce the image to 256 colours nicely. 
$imagick->quantizeImage(256, \Imagick::COLORSPACE_YIQ, 0, false, false); 
  
// Use uniqueImageColors function to distinguish the color of image 
$imagick->uniqueImageColors(); 
  
// Scale the output image 
$imagick->scaleimage($imagick->getImageWidth() * 10,  
              $imagick->getImageHeight() * 50); 
header("Content-Type: image/png"); 
  
// Display the output image 
echo $imagick->getImageBlob(); 
?> 