CIE-CHART - November, 1989

Robert B. Goldstein and Larry Arend
Eye Research Institute of Retina Foundation
20 Staniford St.
Bobton, MA 02114
(617) 742-3140
Internet: goldstein%cdv.decnet@mghccc.harvard.edu

MAKE-CIE-CHART is a Fortran program that produces a rendering,
on an image processor, of the CIE color diagram.

The program sends the output directly to an image processor via the
subroutine SHIP_IMAGE.  In order to run this program, the user must
provide his own image processor setup program (called ADSET in make-cie-chart)
and his own version of SHIP_IMAGE. Three planes (512x512) (red,green,blue) are
produced, each with data in the range 0-255. The data have
been gamma corrected and therefore should be displayed with linear
lookup tables.

A command file, MAKE-CIE-CHART.COM is provided to link and run the program.
The command file assigns 2 logicals, TV and PIX, which are just assigned
to the current directory. The main program is linked to 2 sets of subroutines,
ANNOTATE_SUBS.FOR and COLORPROG3.FOR.

Presently, linking the program will cause 2 undefined external references,
ADSET and SHIP_IMAGE, which pertain to the image processor. If the user
wishes to run this program and doesnt have an image processor, it is
only necessary to comment out two lines in the main program that call
these subroutines.

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LOAD-CIE-CHART.FOR is a program that reads the datafiles
	CIE-1A.R,   CIE-1A.G,   CIE-1A.B
into VAX memory. These files are one of the renderings producable
by the make-cie-chart program. They are provided in the event the user
is only interested in the final result, and does not want to
experiment with the program that produces the rendering.
The above datafiles constitute three planes of a 512x512 image, with
each pixel being one byte in the range 0-255.

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Other files of interest in this directory are:

    FONT88.DAT   -      a Font file for use in annotating the image
    SPECT.DAT    -      The (x,y) coordinates of the CIE Spectrum locus
    nnn.CAL      -      2 different .CAL files needed by the program containing
                        calibration data for 2 different CRTs.
    TEK-89.GAMMATABLE   A file that allows the program to do gamma corrections
                        via table lookup rather than analyticly.