AIPS HELP file for TVHUI in 31DEC21
As of Sun May 16 18:00:01 2021
TVHUI: Make TV image from images of intensity, hue, saturation
New task HUINT may be more useful to you.
INNAME Intensity image name
INCLASS Intensity image class
INSEQ 0.0 9999.0 Intensity image seq. #
INDISK Intensity disk drive #
IN2NAME Hue image name
IN2CLASS Hue image class
IN2SEQ 0.0 9999.0 Hue image seq. #
IN2DISK Hue image disk drive #
IN3NAME Saturation image name
IN3CLASS Saturation image class
IN3SEQ 0.0 9999.0 Saturation image seq. #
IN3DISK Saturation image disk drive #
DOOUTPUT -1.0 3.0 > 0 => write RGB output cube
2, 3 -> also write RGB wedge
OUTNAME Output RGB cube name
OUTCLASS Output RGB cube class
OUTSEQ 0.0 9999.0 Output RGB cube sequence #
0 => highest unique
OUTDISK Output RGB cube disk drive #
0 => highest with space
OUT2NAME Output RGB wedge name
OUT2CLAS Output RGB wedge class
OUT2SEQ 0.0 9999.0 Output RGB wedge sequence #
0 => highest unique
OUT2DISK Output RGB wedge disk drive #
0 => highest with space
IMSIZE Pixel size of output wedge
TBLC 0.0 4096.0 Bottom left corner of 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
OPTYPE 'LUT' else 'S=1' method used
(applies to true and false
color TV implementations)
DOWEDGE -1.0 3.0 > 0 => plot a wedge on top.
> 1.5 => wedge on right edge
> 2.5 => both wedges
DOCIRCLE -1.0 1.0 > 0 => plot hues through a
full circle, else only blue
PIXRANGE Min,Max of image intensity
0 => entire range.
DPARM (1,2) pixrange for hue image
(3,4) pixrange for saturation
(5) ratio # intensity / # hue
levels. 0 -> 1.5
(6) # saturation levels 3 - 4
(7) # total pixels to use in
subimage <= 86000.
(8) use 1-channel method even
on TVs capable of full RGB
(9) > 0 => include wedges in
Use: The new task HUINT does a similar operation on two images with
the option to save images of the data and the step wedge just as
they appear on the TV. This allows them to be plotted by KNTR,
GREYS, PCNTR and then made into PostScript by LWPLA. TVHUI
tries to maintain some relationship with real units in its
output, while HUINT does not.
TVHUI will construct a TV image based on two or three AIPS
images, one representing intensity, one representing hue, and,
optionally, one representing saturation. Two methods of
converting HSI to RGB are offered. The program then enters an
interactive mode in which the user selects options from a menu
shown on a graphics overlay plane. Options are to enhance each
of the images individually, to select linear, square-root, or
one of 2 logarithmic transfer functions for intensity, to select
the window specifying the sub-image which is used during
interactive enhancements, to repaint the full image on the TV
with a simple color scheme or an optimized scheme, and to exit
with or without final updates and an output file. 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
Note that this task was constructed in part to deal with
pseudo-color displays incapable of true 3 color functions. It
has the concept of working on a smaller sub-image to enhance the
coloring and then repainting the full image. It does a look-up
table optimized to represent the full colors in the image using
the limited pseudo-color table available. On those displays
which do true color in 3 separate image memories, TVHUI can do a
much better job representing the image in its full colors.
Nonetheless, it may be slow because the RGB images must be
computed at each change and re-loaded to the TV. This slowness
takes some adjustment on the users' part - be patient, the
results are worth it.
INNAME......Image name for intensity. Standard defaults.
INCLASS.....Image class for intensity. Standard defaults.
INSEQ.......Image seq. # for intensity. 0 => highest.
INDISK......Disk unit # for intensity. 0 => any.
IN2NAME.....Image name for hue. Standard defaults.
IN2CLASS....Image class for hue. Standard defaults.
IN2SEQ......Image seq. # for hue. 0 => highest.
IN2DISK.....Disk unit # for hue. 0 => any.
If any of 3rd name non-blank/zero, then do saturation
IN3NAME.....Image name for saturation. Standard defaults.
IN3CLASS....Image class for saturation. Standard defaults.
IN3SEQ......Image seq. # for saturation. 0 => highest.
IN3DISK.....Disk unit # for saturation. 0 => any.
DOOUTPUT....> 0 => write an output image with the 3rd axis being
RGB. The full range of input intensities are carried
along (i.e. PIXRANGE is ignored in this phase). The
display intensity transfer function is also ignored.
However, the scaling and clipping of the hue and
saturation images done from DPARM(1,2) plus any
interactive enhancement is used to set the color
translation. <= 0 -> skip output file.
The full size of the input images is used for the output
and the pixel increments are ignored.
The effective PIXRANGE of the final display for each of
the images is shown. Use the one shown for Intensity
when you TVLOD the output RGB cube to get the same
display you saw inside TVHUI.
>= 2 => also write an image of the hue-intensity step
wedge. 2 causes the hue to be on the short vertical
axis with intensity on the longer axis, 3 reverses this.
OUTNAME.....Output name for RGB cube. Standard defaults.
OUTCLASS....Output class for RGB cube. Standard defaults.
OUTSEQ......Output seq. # for RGB cube. 0 => highest unique
OUTDISK.....Disk drive # of RGB cube. 0 => highest with
OUT2NAME....Output name for RGB wedge. Standard defaults.
OUT2CLAS....Output class for RGB wedge. Standard defaults.
OUT2SEQ.....Output seq. # for RGB wedge. 0 => highest unique
OUT2DISK....Disk drive # of RGB wedge. 0 => highest with
IMSIZE......Controls the X and Y sizes in pixels of the output wedge
image which is written when DOOUTPUT = 2 or 3.
IMSIZE(1) < 25 -> TTRC(1)-TBLC(1)+1 or the maximum TV
X size if that is less.
IMSIZE(2) < 20 -> 0.2 * Max (IMSIZE(1), 100)
TBLC........Bottom Left Corner of intensity image. (0,0) means
(1,1). The hue image window is the same size as the
intensity 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.
TBLC is ignored on writing the output image except for
any alignment adjustments.
TTRC........Top Right Corner of grey-scale image: (0,0) means top
right corner of map. NOTE: for the intensity image
TTRC(3-7) is set to TBLC(3-7) since only one plane is
shown. If the hue image is a cube, TTRC(3) is taken to
select the plane of that cube to be used for hue. This
allows a hue image of one plane to color am intensity
image of another plane of the same cube. TTRC is
ignored on writing the output image except for any
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 X axis. 0 => 1. Ignored while doing output.
DOALIGN.....Controls how the intensity, hue, and saturation 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. Two channels are used,
TVCHAN for the unoptimized picture and TVCHAN+1 for the
optimized picture. Optimization is not available in
TVHUI when there is only 1 channel; use DOOUT = 1 and
task TVRGB. Three channels are used on true-color TVs.
OPTYPE......Determines algorithm used to convert intensity plus hue
plus saturation into red-green-blue:
= 'LUT' -> TVHUEINT verb method.
else -> Gonzales and Woods, p 236 with S = 1 or
S determined by the saturation image.
DOWEDGE.....If false (<= 0.0), do not plot a step wedge. Otherwise
plot a wedge on the TV, but not in the output image. (A
wedge image is written if DOOUTPUT = 2 or 3.)
If 1.5 >= DOWEDGE > 0.0, then plot a wedge along the top
of the image. If > 1.5, plot a wedge along the
right-hand edge of the image. If > 2.5, plot wedges
along both the top and the right-hand side. Each wedge
is a wedge in intensity along the longer side of the
wedge and in hue along the shorter side of the wedge.
Multiple wedges are drawn for each saturation level.
DOCIRCLE....False (<= 0) means that colors range from red to green
to blue only. This is appropriate for 0th and 1st
moment images for example. True means that colors range
from red to green to blue and back to red (through
purple). This is appropriate to polarization intensity
and angle images, for example.
PIXRANGE....Min,Max of Image intensity. 0 => entire range
DPARM.......(1,2) pixrange for HUE image. 0,0 => full range
(3,4) pixrange for saturation image. 0,0 => full range.
(5) The ratio of the number of intensity levels to the
number of hue levels. Allowed values 1.0 - 2.5..
default 1.5. The number of grey levels is divided
into Nint * Nhue <= Ngrey levels and the lookup table
is set to translate these intensities and hues to
(6) Number of saturation levels to use. Default is 3
and only 3 or 4 is allowed.
(7) Maximum number of pixels in the interactive
sub-image. 0 => 86000, the upper limit.
Interactivity is with a sub-image of the displayed
image. Initially, this is taken as a decimated
sub-image. Interactively, one may specify a smaller
area with correspondingly less extreme decimation.
DPARM(7) is used to speed interactivity by giving up
(8) Some TV devices (e.g. IIS Model 70 and XAS on some
computers) can display 3 separate images in separate
colors. TVHUI will use this where possible unless
DPARM(6) > 0, in which case it uses its "standard"
(9) > 0 => to include the step wedges when optimizing
colors. If one does, then the wedge will be seen
fully but the presence of all colors in the wedge
will probably degrade the optimization of the images.
If one does not, (<= 0) then those colors in the
wedges which are not present in the images will
appear black in the display. This is distracting but
(10) not used yet