dienstplan/node_modules/imagemin-mozjpeg/readme.md

imagemin-mozjpeg

mozjpeg imagemin plugin

Install

$ npm install --save imagemin-mozjpeg

Usage

const imagemin = require('imagemin');
const imageminMozjpeg = require('imagemin-mozjpeg');

imagemin(['images/*.jpg'], 'build/images', {use: [imageminMozjpeg()]}).then(() => {
	console.log('Images optimized');
});

API

imageminMozjpeg([options])(buffer)

Returns a promise for a buffer.

options

quality

Type: number

Compression quality. Min and max are numbers in range 0 (worst) to 100 (perfect).

progressive

Type: boolean
Default: true

false creates baseline JPEG file.

targa

Type: boolean
Default: false

Input file is Targa format (usually not needed).

revert

Type: boolean
Default: false

Revert to standard defaults instead of mozjpeg defaults.

fastcrush

Type: boolean
Default: false

Disable progressive scan optimization.

dcScanOpt

Type: number
Default: 1

Set DC scan optimization mode.

• 0 One scan for all components
• 1 One scan per component
• 2 Optimize between one scan for all components and one scan for 1st component plus one scan for remaining components

notrellis

Type: boolean
Default: false

Disable trellis optimization.

notrellisDC

Type: boolean
Default: false

Disable trellis optimization of DC coefficients.

tune

Type: string
Default: hvs-psnr

Set trellis optimization method. Available methods: psnr, hvs-psnr, ssim and ms-ssim

noovershoot

Type: boolean
Default: false

Disable black-on-white deringing via overshoot.

arithmetic

Type: boolean
Default: false

Use arithmetic coding.

quantTable

Type: number

Use predefined quantization table.

• 0 JPEG Annex K
• 1 Flat
• 2 Custom, tuned for MS-SSIM
• 3 ImageMagick table by N. Robidoux
• 4 Custom, tuned for PSNR-HVS
• 5 Table from paper by Klein, Silverstein and Carney

smooth

Type: number

Set the strength of smooth dithered input. (1...100)

maxmemory

Type: number

Set the maximum memory to use in kbytes.

buffer

Type: buffer

Buffer to optimize.

License

MIT © imagemin