Jump to content

File:JPEG 2000 Artifacts Demonstration.png

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (256 × 1,152 pixels, file size: 353 KB, MIME type: image/png)

Description

This image is a PNG for the demonstration of the compression artifacts of JPEG 2000. I (Shlomi Tal) took the photo of the dog and used it for the demonstration pictures on the Lossy Data Compression page on the Hebrew Wikipedia. There the demonstration is with JPEG, so there are four separate pictures — the original PNG and three JPEGs of differing quality. But this cannot yet be done for JPEG 2000, because of lack of browser support. I converted the PNG (1:1) to JPEG 2000 files in compression ratios of 1:5, 1:10, 1:20, 1:50 and 1:100, then converted all six files into PPM (Portable Pixelmap) and merged them into a single image using pnmcat (from the Netpbm package), and finally converted the result into PNG and optimized it.

Optimized with "Kashmir Web Optimizer" (free): http://hosting05.imagecross.com/image-hosting-16/6156JPEG_2000_Artifacts_Demonstration.png
Source File:LossyDemonstration-Original.png
Author Shlomi Tal
Permission
(Reusing this file)
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.
w:en:Creative Commons
attribution share alike 		This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported 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.
This licensing tag was added to this file as part of the GFDL licensing update.

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current08:26, 6 July 2019Thumbnail for version as of 08:26, 6 July 2019256 × 1,152 (353 KB)Alexis JazzReverted to version as of 19:23, 14 March 2006 (UTC) Can't be sure if metadata, color profiles or browser compatiblity was lost. These overwrites are not needed, MediaWiki handles this.
23:08, 5 July 2019Thumbnail for version as of 23:08, 5 July 2019256 × 1,152 (348 KB)C 1File size reduced by 5KB using OptiPNG, a lossless oprimizer/recompressor for PNG images. No changes made to image or meta data.
19:23, 14 March 2006Thumbnail for version as of 19:23, 14 March 2006256 × 1,152 (353 KB)Shlomital~commonswikiTop-to-bottom demonstration of the compression artifacts of JPEG 2000

The following page uses this file:

Global file usage

The following other wikis use this file:

Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.

If the file has been modified from its original state, some details may not fully reflect the modified file.

Retrieved from "https://en.wikipedia.org/wiki/File:JPEG_2000_Artifacts_Demonstration.png"