image optimizer for web

pingo image optimizer for web

pingo is an experimental lossless and lossy image optimizer (PNG, JPEG, WebP, APNG) designed to be used for web context

pingo optimizing 400 files optimized 400 PNG losslessly

usage — examples

pingo -sN myfolder
N from 0 to 9, optimization level 
pingo -pngfilter=X -sN *.png
X from 1 to 100, quality level

PNG — lossless

-sN in.png
-s9
infile outfile time
43,09 KB 24,69 KB 0,32s
palette ordering
59,71 KB 50,74 KB 0,19s
filtering & alpha
607,27 KB 38,75 KB 0,23s
ordered transforms

PNG — lossy

-pngpalette=X -sN in.png
-pngpalette=100 -s9
infile outfile time
219,49 KB 86,08 KB 0,14s
3-norm: 0.880261
palettization and palette ordering 
-pngfilter=X -sN in.png
-pngfilter=100 -s9
infile outfile time
197,91 KB 121,08 KB 0,47s
3-norm: 0.644463
prediction

PNG — auto

-auto=X -sN in.png
-auto=100 -s6
infile outfile time
171,02 KB 17,31 KB 0,57s
3-norm: 0.000000
lossless optimization
580,38 KB 25,91 KB 0,26s
3-norm: 0.145828
palettization
232,79 KB 148,77 KB 0,29s
3-norm: 0.512102
prediction
975,49 KB 544,41 KB 0,24s
3-norm: 0.303255
JPEG conversion

JPEG — lossless

-jpgtype=M -sN in.jpg
M from 0 to 2, compression type
-jpgtype=0 -s0
infile outfile time
890,51 KB 847,09 KB 0,04s
baseline — fast decode/encode
-jpgtype=1 -s0
infile outfile time
890,51 KB 808,54 KB 0,07s
progressive — slower decode
-jpgtype=2 -s0
infile outfile time
890,51 KB 790,34 KB 0,18s
progressive — slower decode/encode

JPEG — lossy

-jpgquality=X in.jpg
-jpgquality=100
infile outfile time
1,34 MB 930,93 KB 0,18s
4:4:4, baseline 
-jpgquality=X -jpgsub in.jpg
-jpgquality=100 -jpgsub
infile outfile time
1,34 MB 612,40 KB 0,17s
4:2:0 sharp, baseline

WebP — lossless

-webp-lossless -sN in.png
-webp-lossless -s9
infile outfile time
344,80 KB 271,48 KB 0,68s
palette ordering (from PNG) 
-sN in.webp
-s9
infile outfile time
968,56 KB 208,38 KB 0,53s
palette ordering (from WebP)

WebP — lossy

-webp-lossy=X -sN in.png
-webp-lossy=100 -s9
infile outfile time
195,58 KB 72,20 KB 0,06s
3-norm: 0.824367
alpha optimization 
-webp-lossy=X -nopre -sN in.png
-webp-lossy=100 -nopre -s9
infile outfile time
251,73 KB 93,54 KB 0,13s
3-norm: 0.503232
alpha optimization 
-webp-palette=X -sN in.png
-webp-palette=100 -s9
infile outfile time
157,49 KB 35,91 KB 0,19s
3-norm: 0.733423
palettization and palette ordering

WebP — auto

-webp=X -sN in.png
-webp=100 -s9
infile outfile time
171,02 KB 6,94 KB 0,05s
3-norm: 0.000000
lossless optimization
580,38 KB 20,84 KB 0,17s
3-norm: 0.145828
palettization
232,79 KB 50,33 KB 0,05s
3-norm: 0.688819
lossy WebP
975,49 KB 336,31 KB 0,10s
3-norm: 0.429605
lossy WebP

APNG — lossless

-sN in.png
-s9
infile outfile time
114,19 KB 103,13 KB 0,54s
palette ordering
621,74 KB 508,63 KB 0,80s
interframe, filtering & alpha
586,83 KB 340,42 KB 3,39s
interframe, colortype

APNG — lossy

-pngpalette=X -sN in.png
-pngpalette=100 -s9
infile outfile time
370,09 KB 213,13 KB 2,58s
3-norm: 0.247078
palettization and palette ordering 
-pngfilter=X -sN in.png
-pngfilter=100 -s9
infile outfile time
621,74 KB 448,88 KB 1,14s
3-norm: 0.367333
prediction

-resize

-resize=M -auto=X -sN in.png
M from 24 to 4096, highest w/h
-resize=800 -auto=100 -s9
infile outfile time
52,92 KB 27,98 KB 0,15s
resize PNG & palettization
718,89 KB 427,86 KB 0,35s
resize PNG & prediction
8,30 MB 167,02 KB 0,29s
resize JPG, DCT scale & progressive

manual updated on 12 July 2022