PHP | Gmagick modulateimage() Function

Last Updated : 18 Nov, 2019

The Gmagick::modulateimage() function is an inbuilt function in PHP which is used to control the brightness, saturation, and hue of an image.

Syntax:

Gmagick Gmagick::modulateimage( $brightness, $saturation, $hue )

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

$brightness: This parameter is used to hold the value of brightness.
$saturation: This parameter is used to hold the value of saturation.
$hue: This parameter is used to hold the value of hue.

Return Value: This function returns Gmagick object on success.

Errors/Exceptions: This function throws GmagickException on error.

Below programs illustrates the Gmagick::modulateimage() function in PHP:

Program 1:
Input Image:

<?php  
    
// Create a Gmagick object  
$gmagick = new Gmagick( 
'https://media.geeksforgeeks.org/wp-content/uploads/tech.png');  
    
// Use modulateimage function  
$gmagick->modulateimage(60, 100, 100); 
  
header('Content-type: image/png');  
    
// Output the image  
echo $gmagick;  
?>  

Output:

Program 2:

<?php  
     
// Create a GmagickDraw object  
$draw = new GmagickDraw();  
    
// Create GmagickPixel object  
$strokeColor = new GmagickPixel('Red');  
$fillColor = new GmagickPixel('Green');  
    
// Set the color, opacity of image  
$draw->setStrokeOpacity(1);  
$draw->setStrokeColor('Red');  
$draw->setFillColor('Green');  
    
// Set the width and height of image  
$draw->setStrokeWidth(7);  
$draw->setFontSize(72);  
     
// Function to draw circle   
$draw->circle(250, 250, 100, 150);  
   
$gmagick = new Gmagick();  
$gmagick->newImage(500, 500, 'White');  
$gmagick->setImageFormat("png");  
$gmagick->drawImage($draw);  
  
    
// Use modulateimage function  
$gmagick->modulateimage(60, 100, 100); 
   
// Display the output image  
header("Content-Type: image/png");  
echo $gmagick->getImageBlob();  
?>  

Output:

Reference: http://php.net/manual/en/gmagick.modulateimage.php

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