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nodeimageutil

v1.0.3

Published

A image util for Nodejs

Downloads

2

Readme

NodeImageUtil

A image command line tool util for Nodejs。

对常用图像处理命令行工具的node封装。

目前使用ImageMagick来进行图片的裁剪、格式转换、压缩(非PNG)。 使用pngquant来进行PNG图片压缩。

要使用这个包,请保证系统中已经安装了ImageMagick和pngquant。安装方式请自行查找。


install 安装

npm

npm i nodeimageutil

usage 使用

可参考test/test.js

let iu = require('../nodeimageutil');
//修改命令行工具的位置,可以使用相对路径,也可以使用绝对路径。
//Init并非必须要调用的方法,但是可以使用此方法测试命令行工具是否可用。
let err = await iu.Init({...});

//获取图片信息
let info = await iu.Info("filepath");
/*
{
    "IsKnowImage": true,
    "Width": 573,
    "Height": 573,
    "FileSize": 81166,
    "FilePath": "./test/test_image/me.jpg",
    "Format": "JPEG"
}
*/


//转换一个jpg文件,生成一个300x200,质量参数为60的jpg文件
let opt = {
    Quality: 60,
    Width: 300,
    Heigth: 200
};
await iu.Convert(testFile, path.join(tempDir, "out.jpg"), opt);



//转换一个jpg文件成png文件,不修改分辨率,pngquant压缩参数为40-80
opt = {
    Quality: 80,
    PngQunlityMin: 40
}
await iu.Convert(testFile, path.join(tempDir, "out.png"), opt);