[MCN-L] digital media migration

2008-10-20 Thread Han, Yan
I think it is much better to migrate to external hard drives (rather using CDs/DVDs) or massive storage. Depending on how much space you need, 1TB external hard disk costs less than $200. Rather than trusting the failure rate of massive storage (usually expensive), I would rather have multiple

[MCN-L] Archive materials - image sizes?

2008-01-08 Thread Han, Yan
Perian, Regarding scanning dpi, check the de facto best practices published by National Archives. http://www.archives.gov/research/arc/digitizing-archival-materials.html It covers all the materials and provides an easy-to-use guidelines (page 52 -58). The scanning quality can be varied regarding

[MCN-L] DVD's (5 year lifetime true?)

2007-02-12 Thread Han, Yan
DVD/CDs are never good choices for preservation. See the following research In 2002, National Archives and Records Administration (NARA) directed a study of high density magnetic tapes life expectancy and revealed tapes can have a life expectancy of 100 years. ( http://www.archives.gov/research/e

Re: archival storage of CDs

2006-01-02 Thread Han, Yan
Why do you want to use CDs to store images. The maximum size of a CD is 700 MB, only good for a few digital images. We use hard drives only. (Forget about DVDs,they are not good for long-term storage). -Original Message- From: Jansonius, Remko (Vizcaya) [mailto:remko.janson...@vizcay

Re: SPECTRUM metadata material

2003-12-03 Thread Han, Yan
: mcn_mc...@listserver.americaneagle.com Subject: Re: SPECTRUM metadata material Han, Yan wrote: > Does anyone know where the SPECTRUM metadata material available > online? The only place I can find is its official website. I have to > buy the book to look at it. I'm not sure what ex

SPECTRUM metadata material

2003-12-02 Thread Han, Yan
Does anyone know where the SPECTRUM metadata material available online? The only place I can find is its official website. I have to buy the book to look at it. Thanks, Yan --- You are currently subscribed to mcn_mcn-l as: rlancefi...@mail.wesleyan.edu To unsubscribe send a blank email to lea

[MCN-L] compressing TIFFs for museum collection images

1970-01-08 Thread Han, Yan
For TIFF in B/W, you can use CCITT group4 to do lossless compression. The alg is very simple and I believe it is part of TIFF 6 standard. For TIFF in grayscale and color, the common approach is not to compress, but you can try to compress them in LZW, a well-known compression alg (see http://en.wi

[MCN-L] TIFF >> JPEG conversion program

1970-01-08 Thread Han, Yan
I am looking for an open source API that can convert TIFF files to JPEG so that I can integrate it with our current system. Anyone know about this? Thanks, Yan Han University of Arizona Libraries