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PHP | Imagick brightnessContrastImage() Function

  • Difficulty Level : Easy
  • Last Updated : 26 Aug, 2019

The Imagick::brightnessContrastImage() function is an inbuilt function in PHP which accepts three parameters like Brightness, Contrast and Image channel. It is used to change the brightness, contrast of an image. This function converts the brightness and contrast of image into slope and intercept and calls a polynomial function to apply the effect to the image.

Syntax:

bool Imagick::brightnessContrastImage( $brightness, $contrast, 
$channel )

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

  • $brightness: This parameter is used to store the value of the brightness.
  • $contrast: This parameter is used to store the value of the contrast of the image.
  • $channel: This parameter is used to store the value of the channel.

Return Value: This function returns True on success.

Original Image:



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

Program:




<?php 
// require_once('path/vendor/autoload.php'); 
   
// Create a new Imagick Object
$image = new Imagick(
  
// brightnessContrastImage Function
$image->brightnessContrastImage(12, 30);
   
header('Content-type: image/png');
  
// Display the output image
echo $image;
?>

Output:

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

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