PROGRESS REPORT NO. 1 COLOR IMAGE ASSESSMENT PROJECT 6619

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001100030055-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 7
• Document Creation Date: December 28, 2016
• Document Release Date: November 26, 2001
• Sequence Number: 55
• Content Type: REPORT

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by
Period: November 1 through November 30, 1968
Declass Review by NIMA/DOD
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Progress Report No. 1
Project 6619
PROGRESS DURING THE PERIOD
During the month of November work was initiated in the
field of color image assessment. The personnel assigned to the
STATINTL contract are:
photographic scientist, and
program manager,
programmer.
STATINTL
STATINTL
The following computer programs are available from a previous
project:
1. Direction Cosine
2. Ensemble Averaging
3. Color Exposure Table Generator
4. Characteristic Vector
STATINTL 5. Data Reader
6. Raw Exposure Generator
of termination of the previous contract was performed.
previous period, a visit byl was made
to the customer's facility to establish working procedures, materials
needed to be traced, and the extent of program documentation that will
be necessary. Delivered at this time were three sets of cyan, magenta
and yellow micro-step wedges exposed on emulsion types S.O. 151 (2448),
8443 and S.O. 121. The wedge set on type S.O. 151 material replaces
the corresponding set delivered under the previous contract as the
selective exposure separation of the dye layers on the newer set are
more complete.
A decision was made at this meeting to limit the present inves-
tigation to film types S.O. 151, 8443, and S.O. 121,as these emulsions
represent the bulk of original material presently encountered.
Problems associated with S.O. 118 or similar duplication materials
STATINTL
A review of the status of the various subtasks as of the date
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will not be considered under this contract because of the additional
problems due to the multigeneration process.
Trace instructions were established for the analytical cyan,
magenta and yellow micro-step wedges on S.O. 151, S.O. 155, S.O. 121,
8442, and 8443 materials. Desaturated integral micro-step wedges
are also to be traced on film type 151 and desaturated wedges will
be delivered in December on S.O. 121 and 8443 materials for tracing.
These desaturated wedges permit the determination of the characteris-
tic vectors for the automatic exposure table generation routine. The
analytical micro-step wedges are used in determination of the inte-
gral to analytical micro density mapping matrix.
The customer was informed that the mathematics for the T and
F distribution functions could be used in initiating the programming
effort at his facility. The complete mathematical expression for
calculating alpha risk values from these two distributions are con-
tained in Appendix B of the final report, Advanced Color Image
Assessment Concepts, FR-68-6, (July 1968). STATINTL
On 22 November 1968 Fortran subroutines ALPHAT and ALPHAF
efforts.
to the customer to aid his programming
Also included were examples of input to and output from
these two subroutines. Five additional copies of the final report
were mailed at this time.
A Fortran listing of the color exposure table generator program
was mailed to the customer on 27 November 1968. This program uses
the standard third order polynomial fit to a given characteristic
curve followed by an inversion routine to form an exposure table.
The color version of this program first performs an integral to
analytical density conversion using an input mapping matrix, and is
designed to work with the dynamic transfer function of a positive
material over an expanded density range of .01 to 4.00. The program
was mailed with written documentation, flow charts, a Fortran program
listing of the main program, all associated subroutines (TWOCUR and
INVERT), sample input data, and sample output.
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Work is presently being performed on finalizing the charac-
teristic vectors and ensemble averaging program.
A new program has been generated that performs a regression
fit on a sample of scalar multiples derived from an array of color
exposure tables and the associated characteristic vectors. This
fit is made to the generating cyan, magenta and yellow density
values. Work has been started on the mathematical analysis required
for selecting or automatically generating new color exposure tables
based on shifts in the dominant wavelength or purity of the object
color being scanned by the microdensitometer.
No operational problems are seen at the present time.
WORK PLANNED FOR NEXT PERIOD
The primary emphasis during the next reporting period will be
on solving the exposure table generation problem, since correct
exposure table generation is necessary for the determination of
correct modulation transfer function for color materials. Also, if
scanned data becomes available, this data will be analyzed and some
operational exposure tables will be generated.
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pproved For Release 2002/05/08 : CIA-F
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TO BE OPENED ONLY BY
STATINTL
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 Approved For Release 2002/05/08 : CIA-RDP78BO4747AO01100030055-7
Approved For Release 2002/05/08 : CIA-RDP78BO4747AO01100030055-7