PHP | Imagick haldClutImage() Function

The Imagick::haldClutImage() function is an inbuilt function in PHP which is used to replace colors in the image using a Hald lookup table. Hald images can be created using HALD color coder. 

Syntax:

bool Imagick::haldClutImage( $clut, $channel )

Parameters: This function accepts two parameters as mentioned above and described below:

• $clut: This parameter is used to hold the value of Imagick object containing the Hald lookup image.
• $channel: This parameter provides the channel constant that is valid for channel mode. More than one channel can be combined using bitwise operator. The defaults channel in Imagick function is Imagick::CHANNEL_DEFAULT.

Return Value: This function returns True on success. 

Errors/Exceptions: This function throws ImagickException on error. 

Original Image:

The below program illustrates the Imagick::haldClutImage() function in PHP.

Program 1:

php

<?php

// require_once('path/vendor/autoload.php');

// Create new Imagick Objects
$imagick = new \Imagick(realpath('img/geeksforgeeks.png'));
$imagickPalette = new \Imagick(realpath("img/geeksforgeeks.png"));

// Use sepiatoneImage and haldClutImage function
$imagickPalette->sepiatoneImage(50);
$imagick->haldClutImage($imagickPalette);

// Image Header
header("Content-Type: image/jpg");

// Display the output image
echo $imagick->getImageBlob();
?>

Output:

Program 2:

php

<?php

// require_once('path/vendor/autoload.php');

// Create new Imagick Object
$imagick = new Imagick('img/geeksforgeeks.png');
$imagickPalette = new Imagick("img/geeksforgeeks.png");

// Use haldClutImage function
$imagickPalette->sepiatoneImage(150);
$imagick->haldClutImage($imagickPalette);

// Write output Image
$imagick->writeImage('raiseImae1.png');

// Destroy Imagick object
$imagick->destroy();
?>

Output:

Reference: http://php.net/manual/en/imagick.haldclutimage.php