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Example Images #3

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Rich Geldreich edited this page Feb 3, 2022 · 6 revisions
  • waterfall: 1280x853 24bpp

Original image: 2,117,710 bytes, 15.52 bits/pixel (encoded with lodepng)

waterfall

RDO PNG: 1,202,930 bytes, 8.814 bits/pixel

rdopng waterfall.png -level 4 -two_pass -lambda 600

waterfall_rdo

Statistics:

RGB    Max:  54 Mean: 2.021 RMS: 3.075 PSNR: 38.373 dB
R      Max:  33 Mean: 2.130 RMS: 3.164 PSNR: 38.125 dB
G      Max:  23 Mean: 1.536 RMS: 2.316 PSNR: 40.837 dB
B      Max:  54 Mean: 2.396 RMS: 3.605 PSNR: 36.992 dB
Y 709  Max:  19 Mean: 1.457 RMS: 2.186 PSNR: 41.337 dB

Delta image:

waterfall_delta

  • puppy: 1024x788 24bpp

Original image: 1,596,498 bytes, 15.83 bits/pixel (encoded with lodepng)

puppy

RDO PNG: 593,962 bytes, 5.889 bits/pixel

rdopng puppy.png -level 4 -two_pass -lambda 1000

puppy_rdo

Statistics:

RGB    Max:  52 Mean: 3.436 RMS: 5.032 PSNR: 34.096 dB
R      Max:  30 Mean: 2.977 RMS: 4.143 PSNR: 35.784 dB
G      Max:  25 Mean: 2.499 RMS: 3.548 PSNR: 37.131 dB
B      Max:  52 Mean: 4.833 RMS: 6.798 PSNR: 31.483 dB
Y 709  Max:  21 Mean: 2.354 RMS: 3.328 PSNR: 37.687 dB

Delta image:

puppy_delta

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