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How to resize an image in Node Jimp?
NodeJS – Resize() is an inbuilt function that is used to resize the images to the desired size. We can use resize to set the height and width using a 2-pass bilinear algorithm. It can resize an image into any size as declared by the user. We can take input from the user or resize it into fixed Width*Height size.
Syntax
resize(w, h, mode, cb)
Definition of resize() paramters
w – This parameter is used to declare the width of the image. This is a required parameter.
h – This parameter is used to declare the height of the resized image. This parameter is also required.
mode – This is an optional parameter that is used to store the scaling method.
cb – This is also an optional parameter that can be invoked after the compilation is complete.
Input Image
Using Node JIMP – RESIZE()
Before proceeding to use resize() functions, please check that the following statements are already executed for setting up the environment.
npm init -y // Initialising the Node environment
npm install jimp --save // Installing the jimp dependency
Create a resize.js file and copy-paste the following code snippet in it.
Use node resize.js to run the code.
Note – The method name should match with the JS file name. Only then it will be able to call the desired method.
Example
const Jimp = require('jimp');
async function resize() { // Function name is same as of file name
// Reading Image
const image = await Jimp.read
('/home/jimp/tutorials_point_img.jpg');
image.resize(200,200, function(err){
if (err) throw err;
})
.write('/home/jimp/resize.jpeg');
}
resize(); // Calling the function here using async
console.log("Image is processed successfully");Output
Using Node JIMP – RESIZE() with 'cb' optional parameters
Example
const Jimp = require('jimp') ;
async function resize() {
// Reading Image
const image = await Jimp.read
('/home/jimp/tutorials_point_img.jpg');
// Used RESIZE_BEZIER as cb for finer images
image.resize(1024,768,Jimp.RESIZE_BEZIER, function(err){
if (err) throw err;
})
.write('/home/jimp/resize.jpeg');
}
resize();
console.log("Image is processed successfully");Output
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