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Article #378

Re: Please Tell Me About Highspeed Digital Camera

#378
From: Stephen P Blackstock
Date: Thu, 27 Aug 1992 21:52
24 lines
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In article <1992Aug27.162614.14451@vexcel.com> jic@vexcel.com (jic account for NAVY) writes:
>In article <BtLLqn.G0F@world.std.com> bozo@world.std.com (Stephen P Blackstock) writes:
>>In article <1992Aug14.221309.4092@ttinews.tti.com> hollombe@polymath.tti.com (The Polymath) writes:

>>
>>Leaf Systems makes a digital camera back which attaches to a 
>>Hasselblad camera body.  It transfers image data (in about 2 seconds) to
>>a Macintosh Quadra via SCSI.  Resolution is 2K x 2K x 14 bits per pixel, so
>>the amount of data transfered from camera to Mac is 8MB.  Software allows
>>windowing and gamma-mapping of 14-bit data to produce 8-bit images.
>
>I'm a little confused, 8MB in 2 seconds?  Isn't that around 32 Mbits / Sec?

Yes.  4MBytes/sec, or 32 MBits/sec.

>and isn't SCSI limited to 10 Mbits / Sec?

Absolutely not.  Certainly, the Mac's built-in SCSI has severe limitations,
but even it can easily do 1.55 MB/sec, or about 12Mbits/sec.  Leaf's
camera back uses a NuBus SCSI card which is capable of 10MB/sec.  SCSI-2
standards specify rates even higher.

-Stephen Blackstock
 Leaf Systems, Inc.
Technical Details
Message-ID: <Btnwr5.HK5@world.std.com>
Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!usc!rpi!bu.edu!Shiva.COM!world!bozo
References: <1992Aug14.221309.4092@ttinews.tti.com> <BtLLqn.G0F@world.std.com> <1992Aug27.162614.14451@vexcel.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!elroy.jpl.nasa.gov!usc!rpi!bu.edu!Shiva.COM!world!bozo
From: bozo@world.std.com (Stephen P Blackstock)
Newsgroups: sci.image.processing,comp.graphics,sci.med,sci.med.physics
Subject: Re: Please Tell Me About Highspeed Digital Camera
Message-ID: <Btnwr5.HK5@world.std.com>
Date: 27 Aug 92 21:52:16 GMT
References: <1992Aug14.221309.4092@ttinews.tti.com> <BtLLqn.G0F@world.std.com> <1992Aug27.162614.14451@vexcel.com>
Organization: The World Public Access UNIX, Brookline, MA
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