PHP

Last Updated : 23 Mar, 2021

The Gmagick::resampleimage() function is an inbuilt function in PHP which is used to resample the image to the desired resolution.
Syntax:

Gmagick Gmagick::resampleimage( $xResolution, $yResolution, 
$filter, $blur )

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

$xResolution: This parameter is used to set the value for x-resolution for new image.
$yResolution: This parameter is used to set the value for y-resolution for new image.
$filter: This parameter is used to set the value for filter.
$blur: This parameter is used to set the value for blur. The value larger than 1 results in blurry whereas lesser than 1 is sharp.

Return Value: This function returns Gmagick object on success.
Errors/Exceptions: This function throws GmagickException on error.
Below programs illustrates the Gmagick::resampleimage() function in PHP:
Program 1:
Input Image:

<?php
   
// Create a Gmagick object
$gmagick = new Gmagick(
'https://media.geeksforgeeks.org/wp-content/uploads/tech.png');
   
// Resample the image.
$gmagick->resampleimage(120, 100, 5, 2);
 
header('Content-type: image/png');
   
// Output the image
echo $gmagick;
?>

Output:

Program 2:

php

<?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);
 
// Resample the image
$gmagick->resampleimage(90, 90, 6, 10);
  
// Display the output image
header("Content-Type: image/png");
echo $gmagick->getImageBlob();
?>

Output:

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

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