节点Jimp|颜色阴影

原文:https://www.geeksforgeeks.org/node-jimp-color-shade/

简介
色调修改器是 Nodejs | Jimp 中的一个内置颜色修改器，它将黑色混合到图像中。
语法:

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


参数:

• 值–该参数存储要应用的色调量。

输入图像:

例 1:

// 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 shade modifier
  image.color([{apply:'shade', params: [60]}])
  .write('sahde1.png');
} 
main();
  console.log("Image Processing Completed");


输出:

例 2: cb(可选参数)

// 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 shade modifier
  image.color([{apply:'shade', params: [30]}], function(err){
    if (err) throw err;
  })
  .write('shade2.png');
}
main();
  console.log("Image Processing Completed");


输出:

参考:https://www.npmjs.com/package/jimp