AIPS HELP file for TVMLUT in 31DEC22
As of Tue May 30 19:23:30 2023
TVMLUT: Verb which modifies the transfer function of the image
TVCHAN 0.0 16.0 TV channel 0 => enabled
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. Button A or B creates a new
segment. Button C lets you select an old vertex to
reset and button D exits.
Use: Interactively alters the individual TV channel LUTs. The LUT
function used is piece-wise linear with as many as 127 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.
Pressing buttons A or B adds another linear segment to the
function at the right hand (higher input values) end. Pressing
button C allows you to reset a previously set vertex. After
pushing C, move the cursor to the desired vertex 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.
TVCHAN.....Specifies TV channel. If zero, TVMLUT uses all enabled
COLORS.....Specifies colors to be used as 0 => all, 1 => red,
2 => green, and 3 => blue.