MICRODENSITOMETER STUDY OF EFFECTS OF PROCESSING

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A002400020035-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: April 13, 2005
• Sequence Number: 35
• Publication Date: September 8, 1964
• Content Type: REPORT

Approved For ReTase 2005/0:DP78B04 OA 0 400020035-7
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8 Sept 64
SUBJECT: Microdensitometer Study of Effects of Processing
TASK/PROBLEM
1. Collect and study microdensitometric data from mission materials in
an attempt to determine the effect of film emulsions, processing, and printing
on the characteristics of image edges. Also, attempt to determine true location
Qf image edges for mensuration purposes.
DISCUSSION
2. A meeting was held at
A second meeting was hell in Washington with Messrs.
Qn this project to date, and the direction of future effort, He suggested the
inclusion of low contrast resolving power and modulation transfer measurements;
in the data collected on the effect of processing on edges.
concerning the nature of the mensuration problem on which they would
like assistance. This is basically tho problem of dimensioning small objects
in the aerial photograph, in which the objects are not much larger than the
ground resolution of the system. Effort is needed to find a technique which
will give the actual edge location in the presence of image degrading factors
such as smearing of the image due to light spreading in the emulsion, uncom-
pensated image motion, and lens aberrations.
GROUP I
Excluded train aaton~etle
downgrading and
doclasaillcatlon
SECRET
to discuss the progress 25X1
Declass Review by NGA.
Approved For Release 2005/05/02 : CIA-RDP78B04770A002400020035-7
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 Approved For Rele se 2005/05/02: CIA-RDP78BO479A0ff2400020035-7
SECRET
8 Sept 64
4. Data are being collected on the modulation transfer function,
granularity, acuteness, and resolving power of Types 4400, 4401, and
4404 films processed by standard Trenton techniques and in specially
formulated developers designed to give reduced granularity or increased
sharpness.
PLANNED ACTIVITIES
5. During the next quarter, the study of the effects of processing
developer formula variations on film image structure characteristics will
be continued.
6. Work will be started on the mensurational aspects of this project.
7. No work will be started on Phases 2b and 2c of this PAR until
further discussions are held withi These phases involve the use
of trained photointerpreters to evaluate the quality of aerial exposures
having special processing. Test objects must be included in the scene and
the nature of these test objects is the subject of the discussion.
SECRET
Approved For Release 2005/05/02 : CIA-RDP78BO477OA002400020035-7