节点吉普 |高斯
简介: Gaussian()函数是 Nodejs 中的一个内置函数| Jimp 对图像应用真正的高斯模糊,但与其他 Jimp 函数相比,它的处理速度相当慢。
句法:
gaussian(r, cb)
范围:
- r - 此参数存储模糊的像素半径。
- cb – 这是编译完成时调用的可选参数。
输入图像:
设置环境:
npm init -y
安装依赖:
npm install jimp
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');
// invert function
image.gaussian(5)
.write('gaussian1.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');
//gaussian function using callback function
image.gaussian(10, function(err){
if (err) throw err;
})
.write('gaussian2.png');
}
main();
console.log("Image Processing Completed");
输出:
示例 2:使用半径和 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');
//gaussian function using callback function
image.gaussian(10, function(err){
if (err) throw err;
})
.write('gaussian2.png');
}
main();
console.log("Image Processing Completed");
输出:
参考: https://www.npmjs.com/package/jimp