使用jimp在Node.js中调整图像大小并获取新图像的路径

Question

I'm using jimp to resize an image in node.js, I'm successfully able to degrade the image quality, but a bit confused how to get the path of new image

Jimp.read("test.jpg", function (err, test) {
        if (err) throw err;
        test.resize(256, 256)
             .quality(50)                 
             .write("new.jpg"); 
    });

Answer 1

try something like:

Jimp.read("test.jpg", function (err, test) {
        if (err) throw err;
        test.resize(256, 256)
             .quality(50)                 
             .write(__dirname + "./new.jpg"); 
    });

This should save the file to your project root.

More info on __dirname

Answer 2

I am using app-root-path npm to get rootPath:

var appRoot = require('app-root-path');
var imgName = new Date().getTime().toString();
var savePath = appRoot + '/uploads/' + imgName;

Jimp.read("test.jpg", function (err, image) {
    if (err) throw err;
    image.resize(256, 256)
         .quality(50)                 
         .write(savePath);

    // save savePath to database

});

Answer 3

You can increase your image resizing performance by 20 times . Just use another module for image processing. Check this out:

https://github.com/ivanoff/images-manipulation-performance

As you can see there, jimp module is the slowest module.

Try sharp or canvas.