Input
using default image
Compression
MozJPEG
Canvas.toBlob
Quality: luma
chroma
-1 — use luma value
Chroma subsamle: h
v
Smoothing:
Optimization
Quantization table:
0: Tables from JPEG Annex K
1: Flat table
2: Table tuned for MSSIM on Kodak image set
3: Table from http://www.imagemagick.org/discourse-server/viewtopic.php?f=22&t=20333&p=98008#p98008
4: Table tuned for PSNR-HVS-M on Kodak image set
5: Table from: Relevance of Human Vision to JPEG-DCT Compression (1992) Klein, Silverstein and Carney
6: Table from: DCTune Perceptual Optimization of Compressed Dental X-Rays (1997) Watson, Taylor, Borthwick
7: Table from: A Visual Detection Model for DCT Coefficient Quantization (12/9/93) Ahumada, Watson, Peterson
8: Table from: An Improved Detection Model for DCT Coefficient Quantization (1993) Peterson, Ahumada and Watson
Optimize coding
Trellis quantisation
num loops
0 — disabled
multipass
optimize zero blocks
optimize table
Output
Color space:
GRAYSCALE
RGB
YCbCr
CMYK
YCCK
Progressive
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