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PHP | Imagick setImageResolution() Function
  • Last Updated : 26 Aug, 2019

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
  
$imagick = new Imagick(
  
// 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 
$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); 
    
$metrix = $im->queryFontMetrics($draw, $string); 
$draw->annotation(0, 40, $string); 
$im->newImage($metrix['textWidth'], $metrix['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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