home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.sys.sgi:16397 comp.graphics:11856 comp.graphics.visualization:1762
- Newsgroups: comp.sys.sgi,comp.graphics,comp.graphics.visualization
- Path: sparky!uunet!think.com!linus!linus.mitre.org!mbunix.mitre.org!davidas
- From: davidas@mbunix.mitre.org (southard)
- Subject: Low-cost 35mm digital film recorders (SUMMARY)
- Message-ID: <1992Nov13.160644.4263@linus.mitre.org>
- Sender: news@linus.mitre.org (News Service)
- Nntp-Posting-Host: mbunix.mitre.org
- Organization: The MITRE Corp., Bedford, Ma.
- Date: Fri, 13 Nov 1992 16:06:44 GMT
- Lines: 70
-
- Disclaimer: The following opinions are my own, and do not
- reflect an official view of The MITRE Corporation.
-
- Thanks to everyone who replied to my query about low-cost 35mm
- digital film recorders. To recap:
-
- > Are there any low-cost 35mm digital film recorders that can be attached,
- > either directly or via ethernet, to SGI machines? The application
- > is 35mm color transparencies (slides), to be used for presentations, etc.
- >
- > Requirements are: system cost less than $(US)12k; include all driver
- > software for SGI workstations; accessible to heterogeneous workstations
- > over the net; horizontal resolution of 4k lines.
- >
- > Any product or system recommendations, experience, or anecdotes will be
- > welcome.
-
- I found that most responses were, like me, looking for information
- rather than dispensing it. There was a review of digital
- film recorders in Macworld. My criticism of the article is that
- it placed too much emphasis on print time, which in most cases
- depends mostly on the source graphics format (TIFF, PostScript,
- what-have-you) and the rasterizing software that runs (in most cases)
- on the host platform. So this was primarily a test of the software
- and the host platform, not the film recorder itself. I would
- have liked to have seen more tests on the resolvable resolution,
- center-to-corner sharpness, color balance and uniformity, and banding.
- For those interested, the reference is:
-
- James A. Martin (Aug. 1992), Slides While You Wait, Macworld 9(8) 146-152.
-
- While there are certainly a number of systems costing
- over $(US)20 000, these seem to be aimed at
- professional service companies and/or cine animation shops.
- Also the image quality of film recorders costing around
- $(US)10 000 seems to vary quite a bit. Caveat emptor.
-
- Some systems are designed to attach to the workstation's RGB video
- lines. This type of interface allows easy connection to a wide
- variety of workstations, with no software drivers needed.
- The film recorder captures what you see on the CRT monitor.
- However, my experience with this type of interface for color
- printers convinced me that digital was the only way to go.
- First, the image quality captured from an analog video signal is
- inferior to the original digital image. Second, you don't have
- the same flexibility for croping and scaling the image, because
- what you see on the CRT is all you get. Third, you are limited to the
- displayable resolution of your CRT, which means you can't print a
- 2048x2048 image at full resolution.
-
- Finally, I wanted a system that would be available to any workstation
- on our local network, not just to the one workstation to which it
- was directly connected.
-
- In short, we have decided to purchase the following system:
-
- Lasergraphics Personal LFR Film Recorder
- Graftel EM100 Network Color Device Manager with Film Recorder Option.
-
- The Graftel box connects directly to the network, and supports
- rasterization and device drivers for both a color printer and
- a digital film recorder. If I understand correctly, it will look
- like a BSD lpr network printer, and so will be available to
- heterogeneous workstations in our lab. The whole system comes in
- at $(US)12 000, which was just our budget.
-
- Since we have yet to recieve and test this equipment in our own lab,
- I am not posting vendor names and address, but I will respond via
- email for those who wish to check things out for themselves.
- If there is interest, I will post results from our hands-on experiences.
-