; TVBLINK
;---------------------------------------------------------------
;! Verb which blinks 2 TV planes, can do enhancement also
;# VERB TV ANALYSIS
;-----------------------------------------------------------------------
;;  Copyright (C) 1995
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;;
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;;
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;;
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
TVBLINK   LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
TVBLINK:  Verb which blinks 2 TV planes, can do enhancement also
TVCHAN          0.0        43.0    TV channel(s) selection
                                     Two-decimal coded #
                                     < 12  =>  21
          In blink mode:
            Cursor X gives rate, cursor Y gives ratio, button A
            selects enhance image A, button B selects enhance
            image B, button C selects enhance both images
            together, and button D exits.
          In enhancement mode:
            Cursor X gives intercept, cursor Y gives slope, and
            button C reverses sign of slope.  Buttons A and B
            select which channel to enhance and button D
            returns verb to blink mode.
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TVBLINK
Type:  Verb
Use:   To compare images on 2 planes of the TV by blinking them.
       While blinking: the cursor X position controls the blink
       rate, the cursor Y position controls the proportion of
       time spent on each plane, button D causes the verb to
       quit, and Buttons A, B, and C cause the blinking to stop
       and an interactive image enhancement (just like TVTRANSF)
       to begin.  Button A selects channel A and button B
       selects channel B to be enhanced.  Button C specifies
       that both channels are to be enhanced at the same time
       (on TVs which support split screen).  During the
       enhancement, the cursor X position controls the intercept
       and the cursor Y position controls the slope of the
       (linear) transfer function.  Buttons A and B may be used
       to select enhancement of channels A and B, resp.  Button
       C will switch the sign of the slope and Button D will
       return the verb to the blinking mode.  Instructions to
       remind you of these things will appear on your terminal.
Adverbs:
  TVCHAN.....Selects which channel is "channel A" and "channel
             B" as 10 times # of channel B plus # of channel A.
             If TVCHAN < 12, the verb uses 21.  On TVs which
             support split screen, channel A will appear on the
             left (or top) half during enhancement functions.
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