PHP | Imagick normalizeImage() Function

The Imagick::normalizeImage() function is an inbuilt function in PHP which is used to enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.

Syntax:

bool Imagick::normalizeImage( $channel )

Parameters: This function accepts single parameter $channel. This parameter provides the channel constant that is valid for channel mode. More then 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.

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

Program:

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code

<?php
  
// Create an imagick object
$imagick = new Imagick(
  
// Create a copy image
$original = clone $imagick;
  
// Set the width and height of image
$original->cropimage($original->getImageWidth() / 2,
                 $original->getImageHeight(), 0, 0);
                   
// Use normalizeImage function
$imagick->normalizeImage();
  
// Use compositeimage function
$imagick->compositeimage($original, \Imagick::COMPOSITE_ATOP, 0, 0);
  
header("Content-Type: image/jpg");
  
// Display the output image
echo $imagick->getImageBlob();
?>

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Output:
normalize image

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



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