Image Optimizer Core

This Package optimizes your images and adjust the quality automatically. So no standard 80% Quality on your JPEG's.

Install

please have a look at the instruction of node-opencv to install opencv on your machine.

$ npm install image-optimizer-core
# or with yarn
$ yarn add image-optimizer-core

Usage

import optimizer from 'image-optimizer-core'
// or with the old way
// const optimizer = require('image-optimizer-core')


// using files
optimizer('path/to/file.jpg')
    .toFile('output.jpg')
    .then(saved => {
        console.log('I saved you', saved * 100, '%')
    })

// using Buffer
optimizer(buffer)
    .toBuffer()
    .then(output => {
        // ...
    })

// You even get the saved kb back as a percentage
optimizer('example.jpg')
    .toBuffer()
    .then((buffer, saved) => {
        console.log('saved', saved, '%') // 0.72345 ... so it saved you 72.345%
    })

// or if you want, you can even convert your files
optimizer('example.png')
    .toBuffer('image/webp')
    .then((buffer, saved) => {
        console.log('saved', saved, '%') // 0.72345 ... so it saved you 72.345%
    })

API

optimizer(input)

Returns toBuffer and toFile

input

Type: Buffer or String

toBuffer(outputType)

Returns Promise<Buffer>, <saved>

toFile(ouputPath, outputType)

Returns Promise<saved>

output

Type: String

saved

Type: Float

This is the Percentage that this lib safed you in a number between 0-1

outputType

Type: String

can be image/jpeg & image/png & image/webp .

but be aware, we dont support JPEG => PNG

Webpack

if you want to have a webpack loader for it, that uses this package then go to image-optimizer-webpack-loader.