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File:Quality comparison jpg vs saveforweb.jpg

Original file (6,000 × 5,000 pixels, file size: 11.74 MB, MIME type: image/jpeg)

Captions

Captions

Image Optimization

A chart showing 'file size vs quality setting' of a jpeg image created in Adobe Photoshop. As can be seen from the chart, the file size grows exponentially as quality improves.

Save for web (SFW) jpg images generally have a smaller file size than standard jpg until jpg quality = 7 and SFW = 67, when SFW becomes larger in size. This continues until jpg = 11 and SFW = 92 when they are roughly equal and then by jpg =12 SFW = 100, jpg is again the larger. Interestingly jpg 6 quality produced a larger file size then jpg 7 quality.

The scene was carefully chosen to include high detail areas, such as grass and sand, which tend to increase file size, as well as a large amount of graduated sky which is an area which typically shows the most obvious effects of jpeg compression.

The resulting image was saved as jpg 12 quality to minimize any effect this might have on the included images. (I could have saved in uncompressed PNG but I remember when I was on dialup...).


I, the copyright holder of this work, hereby publish it under the following license:
GNU head 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.
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Taken or created by Fir0002


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date/time username resolution size edit summary
12:15, 1 October 2007 User:Fir0002 6,000×5,000 11.74 MB A chart showing file size vs quality of a jpg image. As can bee seen from the chart the file size grows exponential as quality improves. Also save for web jpg images generally have a larger file size until jpg quality = 7 and SFW = 67 when SFW becomes lar

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Date/TimeThumbnailDimensionsUserComment
current18:13, 20 August 2008Thumbnail for version as of 18:13, 20 August 20086,000 × 5,000 (11.74 MB)BetacommandBot (talk | contribs)move approved by: User:Common Good This image was moved from Image:Quality comaprison jpg vs saveforweb.jpg A chart showing 'file size vs quality setting' of a jpeg image created in Adobe Photoshop. As can be seen from the chart, the file size

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