File:JPEG compression Q90-Q100 animated.gif
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JPEG_compression_Q90-Q100_animated.gif (256 × 256 pixels, file size: 107 KB, MIME type: image/gif, looped, 11 frames, 5.5 s)
File information
Structured data
Captions
Summary
[edit]DescriptionJPEG compression Q90-Q100 animated.gif |
English: JPEG artifacts animation. Compressed using cjpeg, -quality argument varies from 90 to 100. 800% zoom. |
Date | |
Source | Own work |
Author | User:Trycatch |
Source
[edit]Bash script to generate the file using ImageMagick 6.6.2:
#!/bin/bash convert -size 64x64 xc:none +antialias -fill grey60 -draw 'rectangle 0,0 63,63' -fill grey80 \ -draw 'line 0,0 64,0' -draw 'line 0,5 64,5' -draw 'line 0,10 64,10' -draw 'line 0,15 64,15' \ -draw 'line 0,20 64,20' -draw 'line 0,25 64,25' -draw 'line 0,30 64,30' -draw 'line 0,35 64,35' \ -draw 'line 0,40 64,40' -draw 'line 0,45 64,45' -draw 'line 0,50 64,50' -draw 'line 0,55 64,55' \ -draw 'line 0,60 64,60' \ -draw 'line -5,0 5,64' \ -draw 'line 0,0 10,64' -draw 'line 5,0 15,64' -draw 'line 10,0 20,64' -draw 'line 15,0 25,64' \ -draw 'line 20,0 30,64' -draw 'line 25,0 35,64' -draw 'line 30,0 40,64' -draw 'line 35,0 45,64' \ -draw 'line 40,0 50,64' -draw 'line 45,0 55,64' -draw 'line 50,0 60,64' -draw 'line 55,0 65,64' \ tga:sample1.tga FRAMES1="" for i in {90..100} do cjpeg -quality $i sample1.tga > sample1-q$i.jpg convert sample1-q$i.jpg -filter point -resize 800% -pointsize 20 -fill black \ -gravity NorthWest -annotate +5+5 "Q=${i}" -crop 256x256+0+0 png:sample1-q$i.png FRAMES1="${FRAMES1} -page +0+0 sample1-q${i}.png" done convert -delay 50 -size 256x256 $FRAMES1 -loop 0 output1.gif
Licensing
[edit]I, the copyright holder of this work, hereby publish it under the following license:
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 15:58, 23 July 2011 | 256 × 256 (107 KB) | Trycatch (talk | contribs) | {{Information |Description={{en|JPEG artifacts animation. Compressed using cjpeg, <code>-quality</code> argument varies from 90 to 100. 800% zoom.}} |Source={{own}} |Date=2011-07-23 |Author=User:Trycatch |Permission= |other_versions= }} |
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