📜  节点吉普 |颜色变暗

📅  最后修改于: 2022-05-13 01:56:37.267000             🧑  作者: Mango

节点吉普 |颜色变暗

介绍
变暗修饰符是 Nodejs 中内置的颜色修饰符 | Jimp 用于将图像变暗到给定的量,范围在 0 到 100 之间。在 100 时,图像将变成黑色图像。

句法:

image.color([
  { apply: 'darken', params: [value] }
]);

范围:

  • value - 此参数存储要应用的黑暗量。它的取值范围为 0 – 100。

输入图像:

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');
// color function having darken modifier
  image.color([{apply:'darken', params: [50]}])
  .write('darken1.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');
// color function having darken modifier
  image.color([{apply:'darken', params: [50]}], function(err){
    if (err) throw err;
  })
  .write('darken2.png');
}
 
main();
  console.log("Image Processing Completed");


输出:

示例 2: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');
// color function having darken modifier
  image.color([{apply:'darken', params: [50]}], function(err){
    if (err) throw err;
  })
  .write('darken2.png');
}
 
main();
  console.log("Image Processing Completed");

输出:

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