AIPS NRAO AIPS HELP file for TVLUT in 31DEC22



As of Thu Jul 7 4:18:04 2022


TVLUT: Verb which modifies the transfer function of the image

INPUTS

NPOINTS         0.0       127.0    Number of vertices between
                                     the end points.  0 => 1.
TVCHAN          0.0        16.0    TV channel(s) selection
                                     Four-decimal coded #
                                     0 => enabled channels
COLORS          0.0         3.0    Color choice (0 all, RGB 1-3)

          Cursor position gives position of a vertex of a piece-
          wise linear function.  First enter all vertices in
          order from left to right pressing any button at the
          desired location.  Then modify any vertices desired
          pressing any button to select the vertex and, when
          ready, any button to set the position and go on to the
          next.  In this mode, button D exits.

HELP SECTION

TVLUT
Type:  Verb
Use:   Interactively alters the individual TV channel LUTs.  The LUT
       function used is piece-wise linear with as many as 128 pieces
       allowed.  The cursor is used in conjunction with TV graphics
       channel 3 to develop the LUT function.  The cursor position
       controls the position of the vertex currently being modified.
       The program begins by requesting the specified number of
       vertices in sequence from left to right.  Press any button to
       go on to the next vertex in the sequence.  Then the verb allows
       you to alter any of the previously specified vertices.  In this
       mode, the pressing of any button sets the current vertex.
       After pushing that button, move the cursor to the next vertex
       to be altered and push any button.  Push button D to exit.
       Note that graphics on the TV is slow.  Move the cursor slowly
       and wait for a plot to finish before hitting a button.
Adverbs:
  TVCHAN......Specifies TV channel.  If zero, TVLUT uses all enabled
              channels.
  COLORS......Specifies colors to be used as 0 => all, 1 => red,
              2 => green, and 3 => blue.
  NPOINTS.....Number of vertices between the lowest input value and
              the highest input value (not counting the points at the
              ends).

EXPLAIN SECTION


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