PHP | Imagick thresholdImage() Function

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The Imagick::thresholdImage() function is an inbuilt function in PHP which is used to changes the value of individual pixels based on the threshold value.

Syntax:

bool Imagick::thresholdImage( $threshold, $channel )

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

$threshold: This parameter set the threshold value.
$channel: This parameter set the channel of image. CHANNEL_DEFAULT is used as a default channel.

Return Value: This function returns True on success.

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

Program:

<?php 
  
// Create an imagick object 
$imagick = new Imagick( 
'https://media.zambiatek.com/wp-content/uploads/zambiatek-9.png'); 
  
// Use thresholdimage function 
$imagick->thresholdimage(0.5, 2); 
header("Content-Type: image/jpg"); 
  
// Display the output image 
echo $imagick->getImageBlob(); 
?> 