From links via the Digital Preservation Coalition website I found this paper from 2009 from the International Journal of Digital Curation.
It mentions Tim’s point about corruption:
“This sensitivity to corruption is traded for a saving in storage space, although the trade-off is not always simply one for the other. For example, Heydegger found that one byte of corruption had the following effect:
·a 10 MB uncompressed TIFF file had just .00001% errors (meaning just that one byte was affected)
·a lossless JPEG2000 file had 17% errors for a saving of 27% in storage
·a lossy JPEG2000 file had 2.1% errors for a saving of 62% in storage”
It would be good to know the latest thinking on this as the article is now 5 years old and as Colin says the use is growing. The article doesn’t mention OpenJPEG as that project seems to start in 2011, so is OpenJPEG a straight port of JPEG2000 or an improvement? I might try to contact William Kilbride at the DPC for a view.
I think it is a bit premature to call jpg2000 a dead format. In fact I would suggest it is a vibrant format, at least as vibrant as jpg itself. The difference is that it is not widely used by the conventional still photography industry. i am led to believe that in the growing digital cinema and video streaming industry jpg 2000 has been at the forefront of how we access media these days.
That said it also has other attributes for the conventional photographer. The Wellcome Trust now use the format for archiving and as the original purpose of this post states it is now the format of choice for IIIF viewer. It does appear that jpg2000 has now begun to take a foothold in digital media and depending upon your needs it should not be a format to be discounted for either an end use file or an archival file.
Colin White - Photography and Digital Imaging
web: http://www.niepce.co.uk
Date: Fri, 24 Oct 2014 11:13:06 +0100
From: [log in to unmask]
Subject: Re: IIIF Image viewer/OpenJPEG/JPEG2K
To: [log in to unmask]
Unfortunately Jpeg2000 will remain a dead format to the rest of the world (it is for the record a nice advancement to the jpg standard). Public uptake is essentially non existent, and after 13 years there isn't any indication, outside of the tiny niche of the public sector library and heritage spaces, that it will emerge again as a viable format.
In 75 years i am comfortable that i will have the ability to determine how to utilise a long dead tiff or jpeg format file, however it is much less likely that a more complex jpg2000 could be accessed. Additionally it is worth looking at the effects of bit failures on each format. The loss of a few bits on an uncompressed tiff are minor, however those same flipped bits can render a more advanced compressed format unusable.
Jpeg2000 should be looked at as a necessary compromise rather than a purposeful solution. It is not a primary format but a specialised one that has clearly failed in the marketplace, and as such the long term preservation risk needs to be taken into account.
It is widely believed that the current limitations of costly storage will disappear in the near future as they have with computer memory and processing power in the past decade, so don’t go too quickly down a path that might be recognised in a few years as a poor long term choice.
Head of Digital Resources & Imaging Services
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I’ve been mulling over going to JPEG2000 for a long time (years!), seems like this could be the push for me when we redevelop our website. I may also be asked to look into online storage at some point which being price per GB/TB would make financial sense too.
I’d be keen to know what others think about the archival nature of JPEG2000 and the surrounding issues. It’s well known that JPEG2000 works for the Wellcome Trust.
Government Art Collection
I missed the conference after having planned to go for months.. Thanks for the update, and I agree, long live OpenJPEG/jpeg2000. It will see greater adoption once we move into multispectral imagery, having native support unlike our piggybacked herd of mutant TIFFs
I attended the (free) International Image Interoperability Framework (IIIF) conference this week at the British Library, which presented IIIF v2.0 and introduced several applications which used the IIIF. IIIF seeks to promote a single image viewer for websites, so is of interest to those of us that have a hand in the website development of our institutions. However, from the strictly image delivery point of view it also was of interest because the standard seeks to promote JPEG2000/OpenJPEG as the standard filetype for websites. It uses one single image as thumbnail, normal, zoom etc, so does streamline the operation, but also allows raking light, UV and other images to be dissolved or compared with the main image.
The neat thing about it is that I started to think that maybe I could move away from TIFFs and save a whole lot of server space as I would only need to store the .jp2 file, whilst still having a file format that can handle colour profiles and metadata and be archival in nature because OpenJPEG/JPEG2000 is now open source. It seems to be gaining ground and is used in many institutions around the world and is highly configurable, they are even looking at how to manage copyrighted works in the framework, so there is a lot to like about it.
More can be found on their website.
Matt Faber has also blogged about it, here:
| Tony Harris
Digital Media & Photography Officer |
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