SVGZ and lossy compression

original file: lab.png (300.14 KB): svgz container and lossy compression
original WebP (cwebp default) pingo -svgz=16
lab - PNG lab - cwebp lab - svgz lossy
300.14 KB 66.34 KB (0.16s) 39.06 KB (0.13s)
dssim - butteraugli 0.00100984 - 3.728334 0.00082322 - 3.416768

convert JPG image to sRGB colour space (including CMYK)

original file: cmyk.jpg (714.46 KB): convert JPG CMYK to sRGB (lossy)
original pingo -auto
cmyk - original cmyk - converted to srgb
714.46 KB 70.83 KB (0.21s)
CMYK converted to sRGB

JPG subsampling (chroma subsampling)

original file: rvb.png chroma subsampling
-jpgsample=0 (default) -jpgsample=2
rvb - sample 0 rvb - sample 2
47.44 KB (quality 100) 33.38 KB (quality 100)
1x1,1x1,1x1 (4:4:4) 2x2,1x1,1x1 (4:2:0)

WebP near-lossless image compression

original file: tweet-coffee.png (54.01 KB): alternative near-lossless WebP (lossy)
original pingo -webp-near=100
tweet cofee - original tweet cofee - webp near lossless 100
54.01 KB 35.78 KB (0.28s)
dssim - butteraugli 0.00003282 - 1.040261

image data enhancement

original file: tomato.png (232.36 KB): enhance details
original -auto=1 -auto=1 -enhance=10
tomato - original tomato - auto1 tomato - auto1 enhance10
232.36 KB 54.55 KB (0.28s) 64.08 KB (0.31s)
dssim - butteraugli 0.00145336 - 3.770774 0.00143575 - 3.695649

WebP alternative near-lossless image compression (filter)

original file: orange.png (222.65 KB): alternative near-lossless WebP (lossy)
original pingo -webp-filter=40
orange - original orange - webp near lossless 50
222.65 KB 86.25 KB (0.32s)
dssim - butteraugli 0.00089928 - 2.105718

fast removal of meta-data from PNG

original file: bear-yellow-itxt.png (98.34 KB): remove non-critical chunks without image data processing
original pingo -fast
bear yellow - original bear yellow - pingo
98.34 KB 22.48 KB (0.01s) - PNG

lossy filtering (PNG)

original file: strawberry.png (276.89 KB): PNG lossy filtering
original pingo -pngfilter=1
strawberry - original strawberry - pngfilter 1
276.89 KB 88.19 KB (0.37s)
dssim - butteraugli 0.00151770 - 3.148625

WebP alternative near-lossless image compression (color)

original file: mac.png (222.65 KB): alternative near-lossless WebP (lossy)
original pingo -webp-color=60
mac - original mac - webp near lossless color 60
222.65 KB 106.80 KB (0.31s)
dssim - butteraugli 0.00025188 - 1.374627