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Olaf
We routinely use jp2 loss-less format. You can download a plugin for
photoshop from www.algovision-luratech.com.
We have obtained 46% compression at the lossless setting so you should get
twice as much data on a CD. jp2 has been accepted by ISO so should be
supported by newer versions of image processing software. We use the free
Irfanview to batch convert.
Lloyd
Dr Lloyd Donaldson - Microscopist
Cellwall Biotechnology Centre
Forest Research,
Private Bag 3020, Rotorua, New Zealand
Ph 64 7 343 5581
email [log in to unmask]
www.forestresearch.co.nz/mnz
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| Subject: Re: Winzip? Data Compression for Archive |
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Search the CONFOCAL archive at
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Hello Olaf,
I haven't heard of any problems with ZIP, and I use it quite often. Another
option would be to select an image file format that allows compression.
There is a JPG standard (JPEG2000), which allows loss-less compression, but
then again, I have no information about the robustness of that format
either.
Don't expect huge space savings from ZIP, though. Typically you get
compression factor of 2. Since hard disks are pretty cheap these days, it
may not be worth the hassle of zipping everything.
mike
Michael Bode, Ph.D.
Soft Imaging System Corp.
12596 West Bayaud Avenue
Suite 300
Lakewood, CO 80228
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-----Original Message-----
From: Olaf Selchow [mailto:[log in to unmask]]
Sent: Monday, March 08, 2004 03:05
To: [log in to unmask]
Subject: Winzip? Data Compression for Archive
Search the CONFOCAL archive at
http://listserv.acsu.buffalo.edu/cgi-bin/wa?S1=confocal
Hello,
I have a question concerning winzip compression of confocal data: In order
to archive large amounts of data from our confocals (mainly tif-images
created by Leica LCS) I'm looking for a good way to compress the files. The
easiest would be to use winzip (which everybody has to unzip in case the
data needs to be restored). But I've heard rumors that winzip would not be
very reliable, especially with image data and that often files would be
corrupted and can't be restored. Is that true? Anybody who has experience
with that type of problem?
Thanks very much!
Olaf
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| Dr. Olaf Selchow |
| SFB 495, Project Z1 - Central Microscopy Facility |
| Institute of Cell Biology and Immunology |
| University of Stuttgart |
| Allmandring 31, 70569 Stuttgart, Germany |
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