DENSITOMETER PROGRAMS FOR DIGITISING IMAGES
               -------------------------------------------


1. NIKSCN:
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	SCAN RECTANGULAR AREA WITH NIKON 
             Compile: FOR/NOSWAP/LIST:NIKDPS.LIS NIKDPS
             Link:    LINK/LIB:FORLIB/LIB:MRCLIB NIKDPS,NIKDVR

       COORDINATE CONVENTIONS:
        LOAD PLATE SO THAT OBJECT LOOKS OK WHEN VIEWED ON TABLE.
        IMAGE ON SCREEN WILL APPEAR ROTATED 180 DEGS.
        FIRST POINT OF SCAN WILL BE LOWER LEFT CORNER OF OBJECT.
        FAST SCAN DIRECTION NX TO RIGHT ACROSS OBJECT, SLOW DIRECTION
        NY FROM BOTTOM TO TOP.
               I.E.  TABLE SCANS FAST TO LEFT AND SLOW OUTWARDS
               TONE DISPLAY ON VAX WILL LOOK LIKE OBJECT AND HAVE
               FIRST SCANNED ELEMENT IN BOTTOM LH CORNER
               CENTRE OF AREA TO BE SCANNED SHOULD BE SET ON LIGHT GUIDE

2. JLSCAN:
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 JOYCE-LOEBL DENSITOMETER SCANNING PROGRAM - input asks following questions

-      SET DATUM BY HAND (T/F)? 
                     JOYCE-LOEBL, VX 1.13 01-Oct-91
                     ##########  SELECT FRESH AREA  ############ 
-      SCAN ELECTRON DIFFRACTION PATTERN(T), OR AREA(F)? 
-      DEFINE LATTICE, OR USE CENTRAL BLACKENING AS CENTRE OF PATTERN (T/F)?
-      FILM TITLE? 
-      FILM NUMBER  for auto-IMCON if used 
-      NX NY NSTEP ISPEED IRAST (5I5)?  
       DEFAULTS ARE:	1)     NX, NY.....SIZE OF AREA TO BE SCANNED
      			3)     NSTEP .....STEPSIZE BETWEEN DIGITISATIONS
      			4)     ISPEED.....0-6 (6=FASTEST)
      			5)     IRAST'.....0=ZIG-ZAG, 1=RASTER(TV)
-      FILE NAME? - UP TO 6 CHARS+3 EXT **N.B.** INCLUDE VB0: 
-      DO YOU WISH TO RETAIN 10 BIT ACCURACY FOR DENSITIES (Y/N)? 
-      NBITS,ITHROW - number of bits to retain and number of least significant
      			bits to discard - output is in a packed format.