Image:Difference 60 x5.jpg
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Difference_60_x5.jpg (279 × 419 pixels, file size: 173 KB, MIME type: image/jpeg)
[edit] Summary
A demonstration of the differences introduced during JPEG compression.
Every time an image is saved in a "lossy" format, such as JPEG, some changes (errors) are inevitably introduced into the image. This example shows the "difference" between the original, and a JPEG-compressed copy.
This image was made thus: The original and the compressed image were put on separate levels, with the difference filtering chosen for the top level. The image was flattened, auto level adjusted and inverted to accentuate the difference, which is not as apparent in the images themselves.
By User:Janke from an original by User:Fir0002 : Original, Jpg
[edit] Licensing
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. |
File history
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Date/Time | Dimensions | User | Comment | |
---|---|---|---|---|
current | 17:44, 5 October 2006 | 279×419 (173 KB) | Janke (Talk | contribs) | (positive version instead) |
17:31, 5 October 2006 | 279×419 (173 KB) | Janke (Talk | contribs) | (example file for FPC, original by Fir0002) |
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