PHP | Imagick thresholdImage() Function

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.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-9.png');

// Use thresholdimage function
$imagick->thresholdimage(0.5, 2);
header("Content-Type: image/jpg");

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

Output:

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