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talgo-libwebp/examples/images/README.md

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Example Images

This directory contains example WebP encoded files and PNG source files.

Image Credits

Photos by Author

These images are taken by author. These photos are licensed under the Creative Commons Attribution 3.0. You can also use these images under the same as go-libwebp's license.

cosmos.png

The cosmos taken in Nokono-shima (Nokono Island), Fukuoka, JAPAN.

cosmos.png

WebP file is generated by following command:

$ cwebp -q 90 cosmos.png -o cosmos.webp
Saving file 'cosmos.webp'
File:      cosmos.png
Dimension: 1024 x 768
Output:    76954 bytes Y-U-V-All-PSNR 45.87 47.63 48.10   46.44 dB
block count:  intra4: 2972
intra16: 100  (-> 3.26%)
skipped block: 1 (0.03%)
bytes used:  header:            249  (0.3%)
mode-partition:  15161  (19.7%)
Residuals bytes  |segment 1|segment 2|segment 3|segment 4|  total
macroblocks:     |       0%|      11%|      33%|      54%|    3072
quantizer:       |      12 |      11 |       9 |       8 |
filter level:    |       4 |       2 |       2 |       4 |

butterfly.png

The butterfly taken in Ishigaki-jima (Ishigaki Island) in Okinawa, JAPAN.

butterfly.png

WebP file is generated by following command:

$ cwebp -q 90 butterfly.png -o butterfly.webp
Saving file 'butterfly.webp'
File:      butterfly.png
Dimension: 1024 x 768
Output:    79198 bytes Y-U-V-All-PSNR 45.50 48.71 49.90   46.44 dB
block count:  intra4: 2775
intra16: 297  (-> 9.67%)
skipped block: 0 (0.00%)
bytes used:  header:            383  (0.5%)
mode-partition:  13227  (16.7%)
Residuals bytes  |segment 1|segment 2|segment 3|segment 4|  total
macroblocks:     |       1%|       7%|      14%|      75%|    3072
quantizer:       |      12 |      12 |      10 |       8 |
filter level:    |       4 |       3 |       2 |       6 |

kinkaku.png

Kinkaku taken in Kyoto, JAPAN.

kinkaku.png

WebP file is generated by following command:

$ cwebp -q 90 kinkaku.png -o kinkaku.webp
Saving file 'kinkaku.webp'
File:      kinkaku.png
Dimension: 1024 x 768
Output:    186300 bytes Y-U-V-All-PSNR 43.86 47.25 48.26   44.81 dB
block count:  intra4: 2775
intra16: 297  (-> 9.67%)
skipped block: 243 (7.91%)
bytes used:  header:            425  (0.2%)
mode-partition:  16737  (9.0%)
Residuals bytes  |segment 1|segment 2|segment 3|segment 4|  total
macroblocks:     |       2%|      28%|      40%|      28%|    3072
quantizer:       |      12 |      11 |       9 |       6 |
filter level:    |       4 |       2 |       2 |       1 |

From Google WebP Gallery

These images picked up from WebP Gallery in Google Developers.

yellow-rose-3.png

"Free Stock Photo in High Resolution - Yellow Rose 3 - Flowers" by Jon Sullivan

This image is clipped by Google and licensed under Creative Commons Attribution 3.0. The Source of this image is in the public domain.

fizyplankton.png

"baby tux for my user page" by Fizyplankton.

This image file is in the public domain.