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PHP | Imagick thresholdImage() Function
  • Last Updated : 26 Aug, 2019

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(
  
// Use thresholdimage function
$imagick->thresholdimage(0.5, 2);
header("Content-Type: image/jpg");
  
// Display the output image
echo $imagick->getImageBlob();
?>

Output:
thresholdimage

Related Articles:

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

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