AIPS HELP file for TVRGB in 31DEC24
As of Thu Apr 25 8:45:31 2024
TVRGB: Task to make a TV image from true-color (RGB) image
INPUTS
INNAME RGB/red image name
INCLASS RGB/red image class
INSEQ 0.0 9999.0 RGB/red image seq. #
INDISK RGB/red disk drive #
IN2NAME Green image name IF needed
IN2CLASS Green image class
IN2SEQ 0.0 9999.0 Green image seq. #
IN2DISK Green image disk drive #
IN3NAME Blue image name IF needed
IN3CLASS Blue image class
IN3SEQ 0.0 9999.0 Blue image seq. #
IN3DISK Blue image disk drive #
TBLC 0.0 4096.0 Bottom left corner of image
0=>entire image
TTRC 0.0 4096.0 Top right corner of image
0=>entire image. See HELP!
TXINC 0.0 1000.0 Increment in pixels on X axis
TYINC 0.0 1000.0 Increment in pixels on y axis
DOALIGN -2.0 1.0 > 0 => images must line up
(see HELP DOALIGN)
TVCHAN 0.0 15.0 TV channel to use, 0 => 1
PIXRANGE Min,Max of red image display
0 => entire range
DPARM (1,2) pixrange of green image
default = PIXRANGE
(3,4) pixrange for blue image
default = PIXRANGE
(5) # levels per R,G,B
< 8 or > 40 => 32.
(6) # pixels in subimage
<= 86000. 0 => 86000.
(7) # levels/r,g,b during
interaction <= (5)
(8) > 0 => use 1-channel
method on TVs capable of
full RGB
(9) > 0 => do NOT place user
number at bottom
DOOUTPUT -1. 2. > 0 => write RGB PostScript
> 1.5 blanks -> white
BLC 0.0 4096.0 Bottom left corner of image
0=>entire image
TRC 0.0 4096.0 Top right corner of image
0=>entire image. See HELP!
OUTFILE
Name of the output file.
blank -> place in printer
queue.
COPIES 0.0 50.0 Number of copies if going
directly to a printer
RGBGAMMA 0. 10. RGB Gamma corrections
REASON
String to place at bottom
HELP SECTION
TVRGB
Type: Task
Use: TVRGB will construct a TV image based on one AIPS image with an
RGB axis, or three AIPS images representing red, green, and blue
in that order. On TV devices capable of displaying 3 images, one
in each color, TVRGB simply uses this capability. On those that
can display only one image with pseudo-coloring, TVRGB first
displays the image in a simple-minded coloring scheme and then
uses a color optimization scheme. The latter was adapted from
ppmquant written and copyrighted (1989, 1991) by Jef Poskanzer.
The program then enters an interactive mode in which the user
selects options from a menu shown on a graphics overlay plane.
Current options are to select the transfer function for each
color, to enhance each of the images individually or all
together, to select the window specifying the subimage which is
used during interactive enhancements, to repaint the full image
on the TV, and to exit. On-line help for the options is
available by positioning the cursor to the option and pushing
button D. Pushing buttons A, B, or C selects the option.
When you are done and select EXIT rather than ABORT, the program
will print (or save in a file) the resulting color image. This is
better than TVCPS because a full 24-bit image is saved rather than
an 8-bit optimally pseudo-colored image. DOOUTPUT must be true to
select this option.
Adverbs:
INNAME......Image name for RGB or red. Standard defaults.
INCLASS.....Image class for RGB or red. Standard defaults.
INSEQ.......Image seq. # for RGB or red. 0 => highest.
INDISK......Disk unit # for RGB or red. 0 => any.
Second and third image ignored if first has an RGB axis
IN2NAME.....Image name for green. Standard defaults.
IN2CLASS....Image class for green. Standard defaults.
IN2SEQ......Image seq. # for green. 0 => highest.
IN2DISK.....Disk unit # for green. 0 => any.
IN3NAME.....Image name for blue. Standard defaults.
IN3CLASS....Image class for blue. Standard defaults.
IN3SEQ......Image seq. # for blue. 0 => highest.
IN3DISK.....Disk unit # for blue. 0 => any.
TBLC........Bottom Left Corner of RGB/red image (0,0) means (1,1).
The other image windows are the same size as the red image
window, but a smaller window will be selected if needed to
overlap the images. See DOALIGN. The image size is also
limited by the size of the TV.
TTRC........Top Right Corner of red image: (0,0) means top right
corner of map. NOTE: for the red image TRC(3-7) is set to
BLC(3-7) since only one plane is shown. If the 2nd image
is a cube, TRC(3) is taken to select the plane of that
cube to be used for green. This allows a green image of
one plane to color a red image of another plane of the
same cube. Similarly, TRC(4) selects the blue plane.
TXINC.......Increment in pixels between displayed pixels along the X
axis. 0 => 1. Ignored while doing output.
TYINC.......Increment in pixels between displayed pixels along the Y
axis. 0 => 1. Ignored while doing output.
DOALIGN.....Controls how the red, green and blue images are to be
aligned (see HELP DOALIGN). True (>.1) means that the
images must agree in their coordinates, though not
necessarily in the reference pixel position. Alignment is
by coordinate values (if DOALIGN > -0.1) or by offsets
from the reference pixel positions (if DOALIGN <= -0.1).
If DOALIGN < -1.5, alignment is at pixels (1,1,...)
ignoring the headers.
TVCHAN......TV channel to use: 0 => 1. Where possible, TVCHAN+1 is
used for the interactive enhancement with sub-image.
PIXRANGE....Min,Max of red intensity. 0 => entire range of 1st image.
The PIXRANGEs are used to clip image intensities at all
times. No matter what scalings are chosen later,
intensities outside the PIXRANGEs are unavailable.
DPARM.......(1,2) pixrange for green image (even in RGB cube).
0,0 => actual PIXRANGE
(3,4) pixrange for blue image (even in RGB cube).
0,0 => actual PIXRANGE
(5) Number of levels used to evaluate R, G, and B for
optimizing. The histogram is DPARM(5)**3 colors, so
smaller values should be faster but possibly less
pleasing. DPARM(5) < 8 or > 40 => use 32.
(6) Number of pixels in the sub-image used during
individual color enhancements; limit 86000.
< 860 => 86000.
(7) Number of levels used to optimize during interactive
enhancement. <= DPARM(5) = default.
(8) > 0 => use 1-channel method even on TVs capable of
full 3-color displays.
(9) > 0 => do not place user at bottom of picture.
(10) not used yet
DOOUTPUT....If true (> 0), write the final image (on EXIT but not
ABORT) to a color PostScript printer or file. If > 1.5,
the black pixels from all 3 images blanked will be written
as white (which is transparent on slides and transparency
paper). The image is actually read from disk to make
the output file using BLC/TRC for corners and pixel
increments of 1.
BLC.........Bottom Left Corner of RGB/red image (0,0) means (1,1).
The other image windows are the same size as the red image
window, but a smaller window will be selected if needed to
overlap the images. See DOALIGN. The output image
size is NOT limited by the size of the TV. BLC(3-7) are
set to TBLC(3-7).
TRC.........Top Right Corner of red image: (0,0) means top right
corner of map. NOTE: for the red image TRC(3-7) is set to
BLC(3-7) since only one plane is shown. If the 2nd image
is a cube, TRC(3) is taken to select the plane of that
cube to be used for green. This allows a green image of
one plane to color a red image of another plane of the
same cube. Similarly, TRC(4) selects the blue plane.
TRC(3-7) will be the same used for TTRC(3-7).
OUTFILE.....The name of the PostScript file. If this is left blank
then the it is automatically placed in the current AIPS
printer queue. If a name is provided, the PostScript
image file will be saved under this name and will not be
placed in the printer queue.
COPIES......Number of copies to print (0 => 1). Set to 1 when OUTFILE
is specified.
RGBGAMMA...."Gamma" corrections to use for the red, green, and blue
images. RGBG(1) = 0 => use the TV gamma, RGBG(2) = 0 =>
use RGBG(1), RGBG(3) = 0 => use RGBG(1).
REASON......Text string to place at bottom of picture
EXPLAIN SECTION