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 to PNG (with filter)

original file: image-optimisation.jpg (254.14 KB): JPG to PNG conversion with more colors
original pingo -pngconvert=8 -pngpalette=100
hand - original hand - original
254.14 KB 63.84 KB (0.78s)

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 paletted encoding

original file: firefox.png (22.01 KB): paletted WebP (lossy)
original pingo -webp-palette=30
firefox - original firefox - webp palette 30
22.01 KB 8.06 KB (0.09s)
dssim - butteraugli 0.00001264 - 1.556444

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

lossy WebP compression (from lib)

original file: flowersp.png (346.52 KB): lossy WebP
original pingo -webp-lossy=100
flowersp - original flowersp - webp lossy 100
346.52 KB 147.89 KB (0.10s)
dssim - butteraugli 0.00018437 - 1.524791

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

transform image data to remove transparency

original file: file01.png (358.51 KB): remove transparency from PNG (lossy)
original pingo -s0 -notrans pingo -notrans (auto)
file01 - original file01 - no transparency file01 -no transparency (JPG)
358.51 KB 315.95 KB (0.17s) 59.45 KB (0.8s)

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