DIR UTILITY

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05171A000300030010-3
• Release Decision: RIPPUB
• Original Classification: T
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: July 30, 2003
• Sequence Number: 10
• Publication Date: September 29, 1969
• Content Type: MF

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MEMORANDUM FOR: Chief, Technical Services & Support Group, NPIC
SUBJECT: DIR Utility
1. In a discussion with and myself, it became evident
that questions are'being asked concerning the utility of DIR within
the Center. I would therefore like to shed some light on the subject
from an APSD viewpoint.
2. The prime types of degradations which appear to be good
candidates for digital image restoration are:
a. Out of focus conditions
b. Image smear due to incorrect IMC, vibration, etc.
c. "Out of focus" due to faulty filters
3. When any, or a combination of these degradations occur on film
there is, depending on the importance of the target, a need to restore
the imagery to fulfill PI requirements. The nature of these requirements
may vary. For example: It may be for initial identification, discri-
mination between types, to insure correct identity or to increase
information (detail). In addition, restoration may be desired to assist
in improving accuracy of mensuration. Often defocused or smeared imagery
makes mensuration a next to impossible task. A restoration technique is
a.solution to recovery of such information. In an effort to avoid
degradation on future missions, it is prudent to feed back to the
operations people data that will assist them in implementing corrective
measures. Image restoration techniques can be used to determine magni-
tude and direction of smear, etc. In other Words, by understanding the
characteristics of the degradations, corrective measures may more easily
and cheaply be employed.
GROUP
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SUBJECT: DIR Utility
4. Having an operational DIR capability should provide us with
the opportunity to extract more information from our degraded materials
especially information which is near, or at the noise threshhold
level. Hopefully, this information,. using DIR, could be recovered in
a rapid, one-step operation. That is, through one series of manipu-
lations, degradations in focus and image smear could be compensated.
5. It could be argued that degraded targets could be acquired on
the next flight. However, there are examples of "one time" situations
where this is impossible. One might cite the following:
a. Missile on a pad. The missile may not be on the pad on
the next revolution or mission. Therefore, if the photography has
been degraded, the only solution to gaining the required information
may rest in restoration.
b. Damage assessment. Nominal damage is quickly altered
or cleaned up. Once again if the photography has been degraded
restoration may be the only solution.
c. Moving targets. This is quite evident. There may never
be an opportunity to re-photograph a moving target. If the photo
from a moving target is degraded, restoration may be the only
solution.
6. The following is a list of projects which have been received
and worked on by APSD, mostly using Iso-d which possibly could have
been more effectively treated using DIR:
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Missile Rentry vehicle (identification on intercept imagery)
Wonson Harbor for Pueblo
7. There appears to be a need for a restoration technique.
Not because it is required for the recovery of information on all
targets effected by image motion or defocus, but because it is needed
to extract information on special, high priority targets and targets
which are not subject to being re-photographed.
Chief, Applied Photo Science Division,
TSSG/NPIC
3 - NPIC/TSSG/APSD
Distribution:
Cy 1 - NPIC/TSSG
2 - NPIC/TSSG/.RED
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 flow No_ no7 Use previous editions