File:GammaCorrection_demo.jpg
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Summary
DescriptionGammaCorrection demo.jpg |
English: 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 |
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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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike Attribution-Share Alike 4.0 International, 3.0 Unported, 2.5 Generic, 2.0 Generic and 1.0 Generic license.
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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
Items portrayed in this file
depicts
14 September 2010
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
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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_ |
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