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Original file (512 × 2,560 pixels, file size: 328 KB, MIME type: image/jpeg)
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Summary
| Description |
A demonstration of the effect of gamma correction on images. |
| Date | |
| Source |
This file was derived from: Weeki Wachee spring 10079u.jpg |
| Author | X-romix 10:00, 7 June 2008 (UTC), Updated by --Rubybrian (talk) 14:25, 14 September 2010 (UTC); Photographer: Toni Frissell |
| Other versions |
|
.jpg)
Licensing
I, the copyright holder of this work, hereby publish it under the following licenses:
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International, 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
You may select the license of your choice.
Code
Code used to create the image:
for x in 0.5 1 2 3 4; do
convert Weeki_Wachee_spring_10079u.jpg -resize 512x -gamma $x ww_${x}.png
done;
montage \
-pointsize 38 \
-font 'LucidaSansRegular.ttf' \
-background white \
-tile 1x5 \
\( ww_0.5.png -gravity southwest -fill white -draw "text 2,2 'γ=2'" \) \
\( ww_1.png -gravity southwest -fill white -draw "text 2,2 'γ=1 (original)'" \) \
\( ww_2.png -gravity southwest -fill white -draw "text 2,2 'γ=1/2'" \) \
\( ww_3.png -gravity southwest -fill white -draw "text 2,2 'γ=1/3'" \) \
\( ww_4.png -gravity southwest -fill white -draw "text 2,2 'γ=1/4'" \) \
\
-geometry 512x+0+0 \
-tile 1x5 \
\
-quality '98%' \
Weeki_Wachee_sprint_10079u_gamma.jpg
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:08, 22 November 2010 | | 512 × 2,560 (328 KB) | Mike.hs | Corrected gamma text to match the wikipedia definition |
| 14:21, 14 September 2010 |  | 512 × 2,560 (327 KB) | Rubybrian | Improved quality of the image. The original had terrible jpeg artifacts. I used this code to create the image using image magick. <pre> for x in 0.5 1 2 3 4; do convert Weeki_Wachee_spring_10079u.jpg -resize 512x -gamma $x ww_${x}.png done; montage \ | |
| 10:00, 7 June 2008 |  | 300 × 1,200 (51 KB) | X-romix | {{Information |Description={{en|1=This collage demonstrates gamma-correction function to make images better. For article en:Gamma correction, [:ru:Гамма-коррекция] }} |Source=http://commons.wikimedia.org/wiki/Image:Weeki_Wachee_spring_ |
File usage
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Global file usage
The following other wikis use this file:
- Usage on bg.wikipedia.org
- Usage on cs.wikipedia.org
- Usage on es.wikipedia.org
- Usage on ja.wikipedia.org
- Usage on pl.wikipedia.org
- Usage on pl.wikibooks.org
- Usage on ru.wikipedia.org
