AIPS HELP file for CURVALUE in 31DEC24
As of Sun Nov 3 22:30:56 2024
CURVALUE: Verb causes display of map image values selected by
INPUTS
the TV cursor
NCHAN 0.0 Limit display to images
loaded to TVCHAN = NCHAN
0 -> all TV memories
GRCHAN 0.0 8.0 Use this graphics channel
0 -> 2
HELP SECTION
CURVALUE
Type: Verb
Use: To perform an interactive display of the pixel locations and
values of those images visible on the TV. The X and Y pixel
coordinates, the pixel value, and the units of the pixel value
are displayed in TV graphics channels 2 and 8 at the upper left
hand corner of the display. The cursor position determines which
pixel is shown. Button D causes the verb to exit. The pixel
values are read from disk, if possible, to preserve accuracy and
dynamic range. When the images were loaded by another computer
or were temporary images (e.g., IMAGR residuals), the pixel
values are read from the TV and suffer from limited accuracy and
clipping
Adverbs:
NCHAN......Limit the display to TV channel NCHAN, 0 -> display image
value from lowest channel having an image at the pixel to
which the cursor is pointed. This adverb may be used to
handle the situation where two images overlap exactly, as
in TVHUEINT or 3-color displays.
GRCHAN.....Write lettering in this graphics channel. 0 -> 2.
EXPLAIN SECTION