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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