PHP | Imagick colorMatrixImage() Function

PHP | Imagick cycleColormapImage( ) Function

Last Updated : 20 Aug, 2019

The Imagick::cycleColormapImage() function is an inbuilt function in PHP which is used to displace the colormap (It is a m × 3 matrix containing real numbers between 0.0 and 1.0. Each row of the matrix is an RGB vector that defines one color.) of the image by a given number of positions. If you cycle the colormap number of times then it can produce a psychedelic effect.

Syntax:

bool Imagick::cycleColormapImage( $displace )

Parameters: This function accepts single parameter $displace which holds the amount to displace the colormap (in integer).

Return Value: This function returns true on success.

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

Program:

<?php 
  
// Declare an Imagick object 
$image = new Imagick( 
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-6.png'); 
  
// Use Imagick::cycleColormapImage() function 
$image->cycleColormapImage (8); 
  
header("Content-Type: image/jpg");  
  
// Display the output image 
echo $image->getImageBlob(); 
  
?> 

Output:

Reference: https://www.php.net/manual/en/imagick.cyclecolormapimage.php

PHP | Imagick colorMatrixImage() Function

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