ABSOLUTE SURVEILLANCE TELEVISION SYSTEMS

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A002700030026-3
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 9
• Document Creation Date: December 28, 2016
• Document Release Date: May 18, 2005
• Sequence Number: 26
• Publication Date: January 27, 1965
• Content Type: MF

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Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030026-3
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 Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030026-3
;Special Activities n
USAPIC, SF-1312-00, Room 1B945
25X1 Pentagon
Washington, D. C., 20310
25X1 I is contemplating the
design and manufacture of a new type f absolute survillance
system.
The system will utilize any television camera .or
purposes of scanning a given area. In the event of any move-
ment of any type within an area of Jtiive scanning lines on the
television monitor an alarm will go off or other switching,
can be accomplished. For purposes of comparison it takes
five scanning lines to resolve a standard pica type face.
I feel that this type of survillance system can be
absolutely foolproof and would offer greater security than
that of any present type of intrusion alarm device on the
market today. For those installations presently utilizing
television as a means of observation this accessory device
will increase the efficiency of the present system by virtue
of the fact that the efficiency of the observer goes down about
fifty percent after fifteen minutes of viewing the same scene.
With the TV alarm device no continuous sight observation would
be required. Multiple cameras may be fed into one alarm system.
As further demonstration of the foolproof nature of
this proposed system, the failure of any of the components
in the system, including the camera, would cause the alarm or
switching to go off. Sensitivity can be adjustable to include
as many lines of information as desired above five lines.
I would like to know whether your facility would be
interested in sponsoring this project with ue in any of the
following ways -
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Approved For Release 2005(0?/06: CIA-RDP78BO477OA002700030026-3
a. Feasibility study funding.
b. R & D funding.
c. Committed purchase of a number of units
sufficient to reimburse us for design and
fabrication after acceptance of prototype.
It is anticipated that the price of the unit will be
in the range of I I unit in small quantity, purchases.
As demand increases we anticipate the price to be reduced
greatly.
Your views on this matter would be greatly appreciated.
Very truly yours,
NRS:bdh
25X1
Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030026-3
 Approved or Release
- -
Television Line Structure
Suppression
Experiments indicate that television viewers select a viewing distance at which the
line structure begins to disappear. If the line structure is destroyed, the pre-
ferred viewing distance is reduced to about 60%. Other advantages and the dis-
advantages of eliminating the line Structure are diseussed. Several nsethods of
eliminating it are described. The results of an experimental comparison of tele-
vision pictures with and without structure suppression are given. A photographic
comparison is also given.
IT HAS BEEN reported' that the most
popular vertical viewing angle for movies
is approximately 17? while that for tele-
vision 'is 8?. Previous data2 which were
verified by experiments described in
this paper indicate that the average eye
is just able to resolve lines which subtend
one minute of arc at the eye. This value
of one minute of arc is equivalent to a
vertical viewing angle of 7.8? for a pic-
ture composed of 480 active lines.
Experiments indicate that television
viewers tend to select a viewing angle at
which the line structure just begins to
disappear. Under these circumstances it
is easy to see one reason why the trend
toward larger television pictures has de-
clined. The average living room cannot
easily provide the minimum 10'2-ft
viewing distance desired for 24-in. re-
ceivers,
It would be desirable to suppress or
eliminate the line structure in television
pictures thereby allowing the larger re-
ceivers to be comfortably viewed at re-
duced distances. Experiments indicate
Presented on April 30, 1957, at the Society's
Convention at Washington, D.C., by Francis T.
Thompson, Westinghouse Research Laboratories,
Westinghouse Electric Corp., Pittsburgh 35, Pa.
(This paper was received on April 30, 1957.)
Original to
be Reproduced
Reproduction Using
a) , Small Spot
(Spot HeightLine Pitch)
that the same viewers who chose 8? ver-
tical viewing angles for a conventional
picture prefer 10? to 16? angles for a re-
duced structure television picture.
Fundamental Considerations
There are several methods of reducing
the appearance of line structure in tele-
vision pictures. Each must accomplish
the same basic task, that of filling in the
dark spaces between the scanning lines
with information which does not contrast
with the scanning lines.
The desired result may be obtained by
increasing the vertical dimension of the
scanning spot. The effect of the vertical
spot dimension on vertical resolution is
illustrated in Fig. 1. In (a) of Fig. 1 the
spot height is less than the line pitch
which is normal in larger size picture
tubes. 'I'hc black space between the scan-
ning lines is distracting. In (b) the ver-
tical spot dimension is equal to the line
pitch and represents the maximum spot
dimension at which full vertical resolu-
tion is retained. In (c) the spot dimcn-
sion is greater than the line pitch result-
ing in beam overlapping and a con-
sequent loss of vertical resolution. The
most desirable is (b) from the point of
view of maximum structure suppression.
It Indicate Path
of Scanning Spot
Line Pitch
__ u.- mr a
Current Black Level
it I,
Position at Time t,
Spot Height
Time t,
Electron Spot
Time t2
Brightness
Time t3
Spot Height
Time t4
Line Pitch
Spot Height
Resultant
Brightness
of Bright Beams
Fig. 1. Effect of vertical electron spot dimension on vertical
resolution.
d I --
Fig. 2. Effect of horizontal spot diameter on horizontai
resolution.
Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030026-3
October 1957 Journal of the SMPTE Volume 66
Mr W. W. Juune$
By FRANCIS T. TIIOMMPSON
Methods of Enlarging the Effective
Vertical Spot Dimension
The vertical spot: dimension may hr
lagged by defocusing the electron sl,,
however, defocusing also enliu?grs ;i.
horizontal spot dimension resulting
in
serious loss of horizontal resolution. 1;;?
effect of increasing the horizontal
dimension, which is similar to incrc;t
the aperture of a pinhole camera, is ili: