HDTenEightyP/NetNews huggingface dataset:
From: plaw@usc.edu (Patrick Law)
Newsgroups: sci.image.processing
Subject: Geometrical Distortion
Keywords: Pin-cushion, barrel distortions.
Date: 14 Oct 92 18:56:35 GMT
Article-I.D.: girtab.1bjbo3INN6p9
Organization: University of Southern California, Los Angeles, CA
NNTP-Posting-Host: girtab.usc.edu

One of my recent homework assignment is about geometrcal distortion
correction. We model the distortion using second order equations.
That is, the reverse address mapping is:

  u = a0 + a1 * x + a2 * y + a3 * x ^ 2 + a4 * x * y + a5 * y ^ 2;
  v = b0 + b1 * x + b2 * y + b3 * x ^ 2 + b4 * x * y + b5 * y ^ 2;

The idea is actually came from Pratt's "Digital Image Processing", 
page 430. A couple of points are picked and the unknowns a's and 
b's are solved by pseudo inversing the matrix.

However, the a's and b's I obtained are very sensitive to the way
that the reference points are picks. My result, of course, is unsat-
isfactory. I wonder if anybody out there has done similar operation
and could give me some hints or references.

Many thanks.


Patrick Law
Newsgroups: sci.image.processing
From: bmoghad@athena.mit.edu (Baback Moghaddam)
Subject: Conformal Mapping Code
Keywords: conformal mapping, logpolar mapping
Organization: Massachusetts Institute of Technology
Date: Fri, 16 Oct 1992 19:29:36 GMT


Anyone have C-code for doing conformal mapping (logpolar transforms)?
I would prefer a robust piece of code with spatially-variant filtering
built in, but will take a look at anything that's available.

Many thanks

Bob

Newsgroups: sci.image.processing
From: ac1@cec2.wustl.edu (Anuj Chandra)
Subject: Log of the Gaussian (LOG) edge detector operator requested!
Organization: Washington University, St. Louis MO
Date: Sat, 10 Oct 1992 00:53:47 GMT


Newsgroups: sci.image.processing
From: alpesh@iastate.edu (Alpesh B Patel)
Subject: Wavelet Transform Code Required....Urgently
Summary: xHi, everybody!
Keywords: Wavelet Transform Code Required....Urgently
Organization: Iowa State University, Ames IA
Date: Tue, 13 Oct 1992 17:08:23 GMT

Hi, everybody!

I'm in need of Wavelet transform Code. If anybody has any idea from where
I could get it, please let me know or if you have it then can you please
post me at alpesh@iastate.edu. I would really appreciate your help.

Thanks in anticipation.

Al.
From: goldberg@rwja.umdnj.edu (Robert Goldberg)
Newsgroups: sci.image.processing
Subject: Need 3D image registration pointers
Date: 8 Oct 92 17:28:01 GMT
Distribution: sci
Organization: Robert Wood Johnson Medical School, Piscataway NJ


	Hi all.

	I'm trying to develop software for merging 3D brain images
	from MRI, Nuclear Medicine, and SPECT data.  I'd appreciate any
	tips or discussion with interested parties.


						Rob (goldberg@umdnj.edu)
From: johnm@mel.dbce.csiro.au (John Mashford)
Newsgroups: sci.image.processing
Subject: image segmentation
Keywords: threshold selection
Date: 12 Oct 92 06:55:30 GMT
Organization: CSIRO, Div. Building Constr. and Eng'ing, Melb., Australia

In their paper "Multisensor data fusion of laser radar and forward looking
infrared (FLIR) for target segmentation and enhancement", (SPIE Vol. 782,
1987) Tong et al., in discussing methods of threshold selection for
segmentation, write:
" ...  classical estimates such as Neyman-Pearson, maximum posteriori, minimax
and maximum likelihood ... ".

If anyone could give me some pointers to references, hints or ideas about any
of these methods of threshold selection I would be very grateful.

-- 
| John Mashford      CSIRO Division of Building, Construction and Engineering |
|                    Post Office Box 56, Highett, Victoria, Australia   3190  |
| Internet: johnm@mel.dbce.csiro.au  Tel: +61 3 252 6000  Fax: +61 3 252 6244 |
|_____________________________________________________________________________|

-- 
|  John Mashford                Email Internet:  John.Mashford@dbce.csiro.au  |
|                               Phone:  +61 3 252 6115  Fax:  +61 3 252 6244  |
|  CSIRO,  DBCE,  Post Office Box 56,  Highett,  Victoria,  Australia   3190  |
|_____________________________________________________________________________|
From: merlin@neuro.usc.edu (merlin)
Newsgroups: sci.image.processing
Subject: Re: Info on Morphological Image Processing
Date: 15 Oct 1992 02:30:54 -0700
Organization: University of Southern California, Los Angeles, CA
NNTP-Posting-Host: neuro.usc.edu

>"Image Analysis and Mathematical Morphology" by J.Serra.


Serra, Jean Paul.
Image analysis and mathematical morphology
London; New York: Academic Press 1982
xviii, 610 p, ill, 23 cm
bibliography pp. 590-601.

====> ISBN 0126372403 <====

LCCN 81066397
OCLC 08769195
Newsgroups: sci.image.processing
From: vdp@mayo.edu (Vinayak Dutt)
Subject: Re: KHOROS - MORE INFORMATION.
Reply-To: vdp@mayo.edu
Organization: Mayo Foundation/Mayo Graduate School :Rochester, MN
Date: Mon, 12 Oct 92 13:16:06 GMT

There is a news group about KHOROS called comp.soft-sys.khoros. Check that out
for more information.

If you want to ftp the source code of KHOROS, the ftp site is pprg.eece.unm.edu 
(source code in /pub/khoros directory).

-------------------------------------------------------
                                           vinayak dutt
            Medical Sciences Building (2)   Mayo Clinic
                                     Rochester MN 55905
                                   e-mail: vdp@mayo.edu
-------------------------------------------------------



Newsgroups: sci.image.processing
From: sassoj@aix.rpi.edu (John J. Sasso Jr.)
Subject: WAVELET TRASNSFORM & EDGE DETECTION
Organization: Rensselaer Polytechnic Institute, Troy NY
Distribution: usa
Date: Fri, 9 Oct 1992 20:21:24 GMT

Hi!

   I have been doing some reading on the use of the wavelet transform for
multiscale edge detection, all of which were papers by Mallat et.al.
I have a basic understanding of the concepts behind edge detection using
wavelets, but I don't know how to actually implement it.

   I am taking a course in computer vision and have done filtering with
3x3 filter operators, and also 3x3 Sobel operators.   However, I would
appreciate it if anyone can give me suggestions on how I implement the
wavelet transform to edege detection.  I want to apply it to 256x256x8
greymap images (PGM images).   Do I use a 3x3 filter?  A diffrent size?
Are the wavelet coeffs. the elements of the filter operator?  What else
is there for me to know?

    I appreciate all the help I can get, because I want to use this as
a class demonstration.   If there are any articles on wavelets for image
processing, could you please list them?

      Thank you very much

      John
Newsgroups: sci.image.processing
From: daniel@adagio.panasonic.com (Daniel C. Gnanaprakasam MARL (609)386-5995)
Subject: Four-color-map problem
Organization: Panasonic Technologies, Inc. Palo Alto, CA
Date: Thu, 15 Oct 1992 13:18:49 GMT

I am looking for a C implementation of the solution to the 
four-color-map problem. The map-coloring problem is defined that one
wants to the color the regions of map in such a way that no two
adjacent regions are of the same color.  The solution was originally
given by Appel K. and Haken W. in Scientific American, Oct 1977.

Thanks
daniel

-- 
Daniel C. Gnanaprakasam                     Phone: (609) 386-5995
Matsushita Applied Research Labs.           Fax  : (609) 386-4999
95D Conneticut Drive	 	           e-mail: daniel@marl.panasonic.com 
Burlington, NJ 08016
Newsgroups: sci.image.processing
From: kevin@neuron.arc.nasa.gov (Kevin Montgomery)
Subject: Re: Trouble mating CCD camera to electron microscope
Organization: NASA-Ames Biocomputation Center
Disclaimer: my thoughts, not NASA's
Date: Wed, 14 Oct 1992 01:10:45 GMT

In article <43886@ogicse.ogi.edu>, milts@mse.cse.ogi.edu (Milt Scholl) writes:
|> Actually we are in the process of putting a 1024X1024X24 bit camera
|> in our 200 KV hitachi.  You can do it two ways a camera with an
|> axis parallel to the beam looking down at the phosphor screen (but
|> there are problems with stray electrons, x-rays in the column) or,
|> as we are doing, using a ccd camera specifically made to fit in
|> the column and intersect the beam with the detector.  There is a
|> device of some type between the ccd and the beam, so you don't get
|> 200 kv electrons zipping through the ccd - electrons go REAL far in
|> silicon and other semiconductors.  I believe we are getting the
|> camera from GATAN.

yes, but you're still converting to light- the original posters were
wanting to blow off the scintillator and just capture the electrons which,
as you said, would penetrate far into Si and probably fry things very nicely.

Out of curiousity, since the phosphor screen produces around a single 
wavelength (660nm?), why are you using a (presumably) color camera w/ 
8-bit for RGB (=24bit)?  or do you have multiple screens and are using
multiple magnetic prisms and looking for different compounds simultaneously
or something else radical?

						kevin

ps: BTW, have heard Bad Things about Gatan's quality and support...  

Newsgroups: sci.image.processing
From: Stuart McKernan <stuartm@epx.cis.umn.edu>
Subject: Re: Want Info on Image tiling
Organization: University of Minnesota HRMC
X-Useragent: Nuntius v1.1
     <1992Oct9.004325.5701@news.arc.nasa.gov> <43886@ogicse.ogi.edu>
Date: Fri, 9 Oct 1992 17:50:17 GMT

In article <43886@ogicse.ogi.edu> Milt Scholl, milts@mse.cse.ogi.edu
writes:
>Actually we are in the process of putting a 1024X1024X24 bit camera
>in our 200 KV hitachi.  .......  There is a
>device of some type between the ccd and the beam, so you don't get
>200 kv electrons zipping through the ccd - electrons go REAL far in
>silicon and other semiconductors.  I believe we are getting the
>camera from GATAN.

The Gatan CCD cameras have a YAG scintillator which is coupled to the CCD 
through a fiber optic plate. More information may be found directly from
Gatan

USA: tel (415) 463 0200 or (412) 776 5260
UK : tel 536 743 150

There are also some other manufacturers bringing out CCD cameras for the
TEM.

Good luck.
Newsgroups: sci.image.processing
From: meier@thumper (Christopher Meier)
Subject: Re: real-time video grabbing
Keywords: real-time , video grabbing
Organization: Image Manipulation Systems Inc.
Date: Fri, 9 Oct 1992 00:34:34 GMT

In article <1992Oct6.112900.14314@cv.ruu.nl> tosb@cv.ruu.nl (Tos Berendschot) writes:
>Does anybody know if there exists some smart card, which
>allows you to grab real-time video images and store them
>on hard-disk (if possible in some compressed format).
>If so, could you send a little message where to get information
>to tosb@cv.ruu.nl
>
>Thanks in advance,   Tos Berendschot

You didn't mention what platform you are on, but here goes...

We (Image Manipulation Systems) market several products in this area.
Our main product is a True Color Live Video frame buffer for the
SPARCstation.  It can accept video in real-time, and optionally display
it on the screen in any X window (X11R5 or OpenWindows V3).  A version
of this product that is just a digitizer is also available.  We also
have a JPEG compression/decompression board, capable of (de)compressing
video at up to 30Hz, to/from our frame buffer/digitizer.  It can also
produce video out from the frame buffer or JPEG decompressed data as
well.  These are all SBUS based products.

For more information on these and other products, feel free to call
us at 612-753-5602 or 1-800-745-5602 (toll free).

Chris


-- 

@ Christopher  M.  Meier                    Image Manipulation Systems
@ Voice: (612) 753-5602 Fax: -5603          17595 Partridge St NW
@ meier%thumper@src.honeywell.com           Andover, MN 55304-1456
Newsgroups: sci.image.processing
From: g9024557@cc.uow.edu.au (James Phillip ANDREW)
Subject: Re: Errata for Gonzalez/Wintz?
Organization: University Of Wollongong
Date: Wed, 7 Oct 92 22:53:26 GMT

cjwein@watcgl.uwaterloo.ca (Chris J. Wein) writes:

>I knew about 2 seconds after I posted that article about G and W that
>I should have mentioned the error so here goes...

>In the section about the discrete cosine transform they define
>the 1D DCT as ...cos((2x+1)u*pi/N)...  When they combine two 1D
>DCT's to form the 2D transform they pull out the 1/N as the argument
>to the cos to form ... (1/N^2)cos((2x+1)u*pi)*cos((2y+1)v*pi) which
>is essentially saying that cos(x/n)*cos(y/n) = (1/n^2)cos(x)cos(y).

Errata:

Shouldn't the 1D kernel (and hence 2D) be cos((2x+1)u*pi/2N) ?

James Andrew
Wollongong

>It is corrected in the Gonzalez and Woods version.
>-- 
>==============================================================================
> Chris Wein                           | cjwein@watcgl.waterloo.edu 
> Computer Graphics Lab, CS Dept.      | cjwein@watcgl.uwaterloo.ca
> University of Waterloo               | (519) 888-4548
From: jbm@eos.arc.nasa.gov (Jeffrey Mulligan)
Newsgroups: sci.image.processing
Subject: Re: Dithering help wanted
Date: 14 Oct 92 21:35:39 GMT
Article-I.D.: eos.1992Oct14.213539.249
Distribution: usa
Organization: NASA Ames Research Center

kmurali2@uoft02.utoledo.edu writes:

>Can anybody help me to implement Dithering in Image coding?

Dithering is covered in Newman & Sproull's "Principles of interactive
computer graphics."  A more recent book is Ulichney's "Digital halftoning."
These both contain references to journal articles if you still need
more detail.

-- 

	Jeff Mulligan (jbm@vision.arc.nasa.gov)
	NASA/Ames Research Ctr., MS 262-2, Moffett Field CA, 94035-1000
	(415) 604-3745
From: ron@topaz.bds.com (Ron Natalie)
Newsgroups: sci.image.processing
Subject: Re: Summary of 24-bit image processing graphics options
Date: 17 Oct 1992 02:23:22 GMT
Organization: BDS Systems
Distribution: world
NNTP-Posting-Host: topaz.bds.com

I don't know about the ALPHA (sounds like wishful thinking on someone's
part).  But we've got the following machines here with 24 bits:

 HP 9000/700 with CRX24
 DEC 5000 with PXG
 Most of the upper end SGI machines (such as CRIMSON)
 DANA/ARDENT/STARDENT/KUBOTA
 IBM PS-2 with RasterOps Card
 

plus a few more that are no longer available.  The Indigo, by the way,
doesn't really have 24 bits.   All of these have R4 or later X servers
and we have tested them with our image processing product.

-Ron
BDS Systems
From: pxm22@po.CWRU.Edu (Prakash Mandgi)
Newsgroups: sci.image.processing
Subject: KHOROS - MORE INFORMATION.
Date: 12 Oct 92 06:26:20 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: thor.ins.cwru.edu


i heard that the KHOROS software for image and Signal Processing is free
stuff for the SUN -os . I am searching for the ftp sites where it is available
. Any additional information would highly appreciated. 
			All responses would be summarized and posted on the net

			mandgi@morph.ebme.cwru.edu
			prakash@ep.ebme.cwru.edu
Newsgroups: sci.image.processing
From: schultz@halley.est.3m.com (John C. Schultz)
Subject: contrast limited adaptive histogram equalization - anyone?
Organization: 3M Company, 3M Center, Minnesota, USA
Distribution: sci
Date: Mon, 12 Oct 92 19:43:31 GMT

Does anyone know of PD implementations of adaptive histogram
equialization or contrast limited adaptive histogram equalization?

C would be nice.  Working with Khoros would be great.

--
   John C. Schultz   +1 (612) 733-4047   schultz@halley.serc.3m.com
   How to include the taste of Glendronach in a multi-media system?
Newsgroups: sci.image.processing
From: ritley@uimrl7.mrl.uiuc.edu ()
Subject: Re: Fourier Analysis on PC
Reply-To: ritley@uiucmrl.bitnet ()
Organization: Materials Research Lab
Date: Thu, 8 Oct 1992 13:45:18 GMT

In article <03249587.718508997@mama>, 03249587@mama.minmet.uq.oz (Darcy
Clark) writes:
|
|>
|> I'm keen to find an image analysis package for the IBMPC which will
|>do FFT
|> analysis of digitized images. Does anyone know of one ??
|>     DARCY CLARK - 03249587@minmet.uq.oz.au
|>
|>

I am afraid I cannot directly answer your question, but....

A terrific source of information about PC-based image processing
products is a free
book/catalog published by Data Translation, makers of PC-based frame
grabbers.
(Data Translation: 508-481-3700.)

It lists hundreds of companies which make image-processing-related products,
cameras, software, etc.

It is a fantastic reference book to have.
From: mccreary@sword.eng.hou.compaq.com (Ed McCreary)
Newsgroups: sci.image.processing
Subject: reseau marks: search and destroy
Date: 13 Oct 92 18:50:15 GMT
Article-I.D.: twisto.1992Oct13.185015.25090
Organization: Compaq Computer Corp.

Is there a standard method used to remove camera reseau marks 
from an image?  The only method that comes to mind is to search
the area surrounding were the mark should be and then blending
an area large enough to cover it.  This seems rather kludged though,
but none of the books I've read go into any detail on it.

Any and all hints are appreciated.


--
In the midst of the word he was trying to say,|McCreary@sword.eng.hou.compaq.com
     In the midst of his laughter and glee,   |Me, speak for Compaq?  
He had softly and suddenly vanished away---   |Yeah, right.
     For the Snark *was* a Boojum, you see.   |#include <stddisclaimer.h>
Newsgroups: sci.image.processing
From: leyfre@McRCIM.McGill.EDU (Frederic Leymarie)
Subject: Re: Info on Morphological Image Processing
Organization: McGill Research Centre for Intelligent Machines
Date: Thu, 15 Oct 92 15:07:25 GMT


In article <1bjdoeINN2c7@neuro.usc.edu>, merlin@neuro.usc.edu
 (merlin) writes:

|> Serra, Jean Paul.
|> Image analysis and mathematical morphology
|> London; New York: Academic Press 1982
|> xviii, 610 p, ill, 23 cm
|> bibliography pp. 590-601.

|> ====> ISBN 0126372403 <====

|> LCCN 81066397
|> OCLC 08769195

NB: The above is VOLUME 1 of series which should eventually be
in 3 volumes; but only 2 have been published so far.

I recommend Volume 2 for a more up-to-date view of Math. Morpho.

Serra, Jean, ed.
Image analysis and mathematical morphology
Volume 2: Theoretical Advances
London; New York: Academic Press 1988
411 pp.
-- 
Frederic Leymarie -- leyfre@mcrcim.mcgill.edu
McGill University, Electrical Eng. Dept., McRCIM,    |	Tel.: (514) 398-8236
3480 University St., Montreal, QC, CANADA, H3A 2A7.  |	FAX:  (514) 398-7348
Newsgroups: sci.image.processing
From: udita@MV3600.BMEN.TULANE.EDU
Subject: APOLOGIES
Reply-To: udita@MV3600.BMEN.TULANE.EDU
Organization: TULANE, BMEN, NEW ORLEANS, LA
Date: Sun, 11 Oct 1992 05:50:03 GMT
Nntp-Posting-Host-[nntpd-21285]: mv3600.bmen.tulane.edu

sorry for my earlier posting, was trying to reply to the person who
asked for information on merging images and ended up posting it on
the net.
udita taneja
Newsgroups: sci.image.processing
From: reo@atlanta.dg.com (Bob O'Donnell)
Subject: Where PD OCR Sources? 
Date: Thu, 15 Oct 92 18:31:35 GMT
Organization: Data General Corp. ASSD, Atlanta, GA
Keywords: OCR

Does anyone out there know where I can OCR Sources (C, or CPP).

Where are working with TIFF images and need to OCR one text field in the
image.   We need a library interface, DDL or sources.   We are currently
looking at a couple commercial packages but we're not real happy with what
we have seen thus far.  We plan to implement on MS-Windows 3.1, 386 enhanced
mode with tons of memory.

--------------------------------------------
   Bob O'Donnell
   Data General Corporation
   Systems Integration Services
   Norcross, Ga.   30092
   (404) 448-6072
----------------------------- AViiON -------

PS Sources should be PD
From: clv2m@uvacs.cs.Virginia.EDU (Charles Viles)
Newsgroups: sci.image.processing
Subject: Re: image segmentation
Keywords: threshold selection
Date: 13 Oct 92 21:56:33 GMT
Organization: University of Virginia Computer Science Department

In article <541@highett.mel.dbce.csiro.au>, johnm@mel.dbce.csiro.au (John Mashford) writes:
> In their paper "Multisensor data fusion of laser radar and forward looking
> infrared (FLIR) for target segmentation and enhancement", (SPIE Vol. 782,
> 1987) Tong et al., in discussing methods of threshold selection for
> segmentation, write:
> " ...  classical estimates such as Neyman-Pearson, maximum posteriori, minimax
> and maximum likelihood ... ".
> 
> If anyone could give me some pointers to references, hints or ideas about any
> of these methods of threshold selection I would be very grateful.

You might take a look at the following:
Sieracki, ME, SE Reichenbach, KL Webb. 1989. An evaluation of automated threshold selection
methods for accuratel sizing microscopic fluorescent cells by image analysis. Applied and 
Environmental Microbiology 55:2762-2772.

It's in a wierd place (the first author is a marine scientist, the second author is
on the CS faculty at Nebraska-Lincoln), but you might find it helpful. 
Charlie
Newsgroups: sci.image.processing
From: 03249587@mama.minmet.uq.oz (Darcy Clark)
Subject: Fourier Analysis on PC
Organization: Prentice Centre, University of Queensland
Date: Thu, 8 Oct 1992 01:49:57 GMT

 I'm keen to find an image analysis package for the IBMPC which will do FFT
 analysis of digitized images. Does anyone know of one ??
     DARCY CLARK - 03249587@minmet.uq.oz.au
From: u882405@franklin.cc.utas.edu.au (Paul J. Watson)
Newsgroups: sci.image.processing
Subject: Practical uses for multi-viewpoint scene analysis  ?
Summary: Request for information about multi-viewpoint scene analysis
Keywords: multi-viewpoint image-analysis scene-analysis
Date: 16 Oct 92 12:27:06 GMT
Organization: University of Tasmania, Australia.

Greetings,
          I am looking for information and references which relate to the
practical uses of multi-viewpoint image analysis for object detection, 
as part of an essay which I have to complete for my Honors course.

Some of the possible uses for this method of scene analysis are : 
 o  automated mapping for surveying, from multiple aerial photographs,
      as suggested in a recent issue of National Geographic which described
      the mapping of Mt Everest,
 o  medical image analysis, from CAT/NMR/Sonar/X-ray,
 o  robotic vision, where the images are obtained from multiple TV cameras
      (or other 2D image sensors ??),
 o  3D object encoding for use with 3D morphing, 
 o  Scene reconstruction from moving viewpoint video,

ANY practical (or theoretical) reference/experiences you could provide would be 
*greatly* appreciated. Please e-mail me replies to save bandwidth.

I will post a summary (and the essay itself) if there is enough interest.

Many thanks,

Paul J. Watson.
--
Paul J. Watson - u882405@bruny.cc.utas.edu.au  )  _--_|\   ) Apprentice
                                              (  / oz   \ (   Bitsmith
-- I think therefore I shouldn't be here. -Me  ) \_.--._/  )------------
===President of the Science Honours Club======(======> *  ( 3D photo nut
From: milts@mse.cse.ogi.edu (Milt Scholl)
Newsgroups: sci.image.processing
Subject: Re: Trouble mating CCD camera to electron microscope
Date: 9 Oct 92 16:22:52 GMT
Article-I.D.: ogicse.43886
Organization: Oregon Graduate Institute, Material Science & Engineering

>|> My first reaction was to do away with the lens altogether, and put the CCD
>|> straight into the TEM (it is a TEM isn't it?).  I'm not sure how far your
>
>I'd asked this of everyone I could find about a year ago and found that the
>overwhelming consensus was that this was a Bad Idea.  
>
>I don't want to be a downer on this and would actually be really excited for
>someone to look into it, but I do want people to realize the implications.
>

[ cut, snip, cut ]

Actually we are in the process of putting a 1024X1024X24 bit camera
in our 200 KV hitachi.  You can do it two ways a camera with an
axis parallel to the beam looking down at the phosphor screen (but
there are problems with stray electrons, x-rays in the column) or,
as we are doing, using a ccd camera specifically made to fit in
the column and intersect the beam with the detector.  There is a
device of some type between the ccd and the beam, so you don't get
200 kv electrons zipping through the ccd - electrons go REAL far in
silicon and other semiconductors.  I believe we are getting the
camera from GATAN.

Hope this is of use.

milt scholl