The Imagick::normalizeImage() function is an inbuilt function in PHP which is used to enhances the contrast of a color image by adjusting the color of the pixel to span the entire range of colors available.
Syntax:
bool Imagick::normalizeImage( $channel )
Parameters: This function accepts a single parameter $channel. This parameter provides the channel constant that is valid for channel mode. More than one channel can be combined using the 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:
<?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(); ?> |
Output:
Reference: http://php.net/manual/en/imagick.normalizeimage.php
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