PHP | Imagick setImageResolution() Function

Last Updated : 06 Oct, 2021

The Imagick::setImageResolution() function is an inbuilt function in PHP which is used to set the resolution of an image object.
Syntax:

bool Imagick::setImageResolution($x_resolution, $y_resolution)

Parameters: This function accept two parameters as mentioned above and described below:

$x_resolution: It is required parameter which specifies the x-axis resolution.
$y_resolution: It is required parameter which specifies the y-axis resolution.

Return Value: This function returns the resolution as an array.
Below program illustrates the Imagick::setImageResolution() function in PHP:
Original Image:

https://media.geeksforgeeks.org/wp-content/uploads/geeks-21.png

Program 1:

php

<?php

$imagick = new Imagick(
'https://media.geeksforgeeks.org/wp-content/uploads/geeksforgeeks-15.png');

// Getting Resolution of image
// using getimageresolution function
$res = $imagick->getImageResolution();
echo "X = ".$res['x'] . "</br>";
echo "Y = ".$res['y'] . "</br>";

// Function to set image resolution
$imagick->setImageResolution(50, 50);


echo "After Set Resolution: </br>";

// Getting Resolution of image
// using getimageresolution function
$res = $imagick->getImageResolution();
echo "X = " . $res['x'] . "</br>";
echo "Y = " . $res['y'] . "</br>";
?>

Output:

X = 37.8
Y = 37.8
After Set Resolution:
X = 50
Y = 50

Original Image:

https://media.geeksforgeeks.org/wp-content/uploads/Screenshot-from-2018-10-16-23-23-54.png

Program 2:

php

<?php 
$string = "Computer Science portal for Geeks!"; 
   
// Creating new image of above String 
// and add color and background 
$im = new Imagick(); 
$draw = new ImagickDraw(); 
  
// Fill the color in image 
$draw->setFillColor(new ImagickPixel('green')); 
  
// Set the text font size 
$draw->setFontSize(50); 
  
$matrix = $im->queryFontMetrics($draw, $string); 
$draw->annotation(0, 40, $string); 
$im->newImage($matrix['textWidth'], $matrix['textHeight'], 
         new ImagickPixel('white')); 
           
// Draw the image          
$im->drawImage($draw);
echo "Before: </br>";

// Getting Resolution of created image
// using getimageresolution function
$res = $im->getImageResolution();
echo "X = ".$res['x'] . "</br>";
echo "Y = ".$res['y'] ." </br>";


// Set image resolution (50, 50) 
$im->setImageResolution(50, 50); 

echo "After:</br> ";

// Getting Resolution of created image
// using getimageresolution function
$res = $im->getImageResolution();
echo "X = ".$res['x'] . "</br>";
echo "Y = ".$res['y'] ." </br>";
?>

Output:

Before:
X = 0
Y = 0
After:
X = 50
Y = 50

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

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