📜  节点吉普 |调整大小

📅  最后修改于: 2022-05-13 01:56:23.275000             🧑  作者: Mango

节点吉普 |调整大小

介绍
resize()函数是 Nodejs 中的内置函数| Jimp 使用 2-pass 双线性算法将图像大小调整为设定的宽度和高度。
句法:

resize(w, h, mode, cb)

范围:

  • w - 此参数存储图像的宽度。
  • h - 此参数存储图像的高度。
  • mode – 这是存储缩放方法的可选参数。
  • cb – 这是编译完成时调用的可选参数。

输入图像:

第一步:搭建环境

npm init -y

第 2 步:安装jimp

npm install jimp --save

示例 1:

javascript
// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
    const image = await Jimp.read
('https://media.geeksforgeeks.org/wp-content/uploads/20190328185307/gfg28.png');
// rotate Function having rotation as 55
    image.resize(323, 421)
    .write('resize1.png');
}
 
main();
    console.log("Image Processing Completed");


javascript
//npm install --save jimp
//import jimp library to the environment
var Jimp = require('jimp');
 
//User-Defined Function to read the images
async function main() {
    const image = await Jimp.read
('https://media.geeksforgeeks.org/wp-content/uploads/20190328185333/gfg111.png');
//rotate Function having rotation angle as 99, mode and callback function
  image.resize(1024, 768, Jimp.RESIZE_BEZIER, function(err){
      if (err) throw err;
  })
      .write('resize2.png');
}
 
main();
  console.log("Image Processing Completed");


输出:

示例 2:使用 cb(可选参数)

javascript

//npm install --save jimp
//import jimp library to the environment
var Jimp = require('jimp');
 
//User-Defined Function to read the images
async function main() {
    const image = await Jimp.read
('https://media.geeksforgeeks.org/wp-content/uploads/20190328185333/gfg111.png');
//rotate Function having rotation angle as 99, mode and callback function
  image.resize(1024, 768, Jimp.RESIZE_BEZIER, function(err){
      if (err) throw err;
  })
      .write('resize2.png');
}
 
main();
  console.log("Image Processing Completed");

输出:

参考: https://www.npmjs.com/package/jimp