imagemin-mozjpeg
Install
$ npm install @mole-inc/imagemin-mozjpeg
Usage
const imagemin = require('imagemin');
const imageminMozjpeg = require('@mole-inc/imagemin-mozjpeg');
(async () => {
await imagemin(['images/*.jpg'], 'build/images', {
use: [
imageminMozjpeg()
]
});
console.log('Images optimized');
})();
API
imageminMozjpeg(options?)(buffer)
Returns a Promise<Buffer>
.
options
quality
Type: number
Compression quality, 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
trellis
Type: boolean
Default: true
trellisDC
Type: boolean
Default: true
Trellis optimization of DC coefficients.
tune
Type: string
Default: hvs-psnr
Set Trellis optimization method. Available methods: psnr
, hvs-psnr
, ssim
, ms-ssim
overshoot
Type: boolean
Default: true
Black-on-white deringing via overshoot.
arithmetic
Type: boolean
Default: false
Use arithmetic coding.
dct
Type: string
Default: int
Set DCT method:
-
int
Use integer DCT -
fast
Use fast integer DCT (less accurate) -
float
Use floating-point DCT
quantBaseline
Type: boolean
Default: false
Use 8-bit quantization table entries for baseline JPEG compatibility.
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 kilobytes.
sample
Type: string[]
Set component sampling factors. Each item should be in the format HxV
, for example 2x1
.
buffer
Type: buffer
Buffer to optimize.
License
This is a fork of imagemin/imagemin-mozjpeg.
see license file.