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File:Continuously varied JPEG compression for an abdominal CT scan - 1471-2342-12-24-S1.ogv

Original file ‎(Ogg multiplexed audio/video file, Theora/Vorbis, length 44 s, 1,280 × 720 pixels, 639 kbps overall, file size: 3.31 MB)

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English: The supplemental video demonstrates the effect of continuously increasing JPEG compression from Q = 100 to Q=1 and then decreasing JPEG compression back up to Q=100 for an abdominal CT scan. The continuous range of Q values shown in the video is similar to what subjects viewed in Psychometric Experiment 1 (see Results), but in the actual experiment, the viewer was able to actively control the process of scrolling through the stack of images.
Date
Source Flint A (2012). "Determining optimal medical image compression: psychometric and image distortion analysis". BMC Medical Imaging. DOI:10.1186/1471-2342-12-24. PMID 22849336. PMC: 3431233.
Author Flint A
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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This file was transferred to Wikimedia Commons from PubMed Central by way of the Open Access Media Importer.
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Date/TimeThumbnailDimensionsUserComment
current19:05, 25 February 201744 s, 1,280 × 720 (3.31 MB)Gnash (talk | contribs)Optimized
01:23, 19 November 201244 s, 1,280 × 720 (3.38 MB)Open Access Media Importer Bot (talk | contribs)Automatically uploaded media file from Open Access source. Please report problems or suggestions here.

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Format Bitrate Download Status Encode time
VP9 720P 300 kbps Completed 18:39, 22 August 2018 22 s
Streaming 720p (VP9) 251 kbps Completed 05:04, 7 February 2024 1.0 s
VP9 480P 180 kbps Completed 18:38, 22 August 2018 17 s
Streaming 480p (VP9) 131 kbps Completed 01:52, 25 January 2024 1.0 s
VP9 360P 117 kbps Completed 18:38, 22 August 2018 13 s
Streaming 360p (VP9) 68 kbps Completed 18:12, 5 February 2024 1.0 s
VP9 240P 82 kbps Completed 18:38, 22 August 2018 11 s
Streaming 240p (VP9) 33 kbps Completed 05:30, 14 December 2023 1.0 s
WebM 360P 258 kbps Completed 19:06, 25 February 2017 29 s
Streaming 144p (MJPEG) 1.01 Mbps Completed 12:53, 2 November 2023 2.0 s
Stereo (Opus) 49 kbps Completed 16:41, 17 November 2023 1.0 s
Stereo (MP3) 128 kbps Completed 05:26, 1 November 2023 1.0 s

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