USGS

Isis 2 Documentation


pix2mm Documentation

pix2mm - Convert pixel measurements to millimeter measurements.
This perl script handles the conversion of measurments from pixels to
millimeters, in preparation for doing a geodetic solution using the
RUPG geodesy software. The program takes pixel measurements from
digitized images and translates and scales the measurments to get the
corresponding location on the camera lens, in millimeters.
Additionally, corrections for distortion may be made.

The translation and scaling factors used to map from pixels to
millimeters depend on the instrument used. Because of some naming
conflicts in the FSC's, which are the most reliable indicator this
program has of which instrument each measurment came from, the program
needs to know the target planet or moon (TARGET) that the images are
of. Once it has that information, all conflicts are resolved and the
program will figure out what conversions to do automatically.

Also, for more complicated conversions and corrections, the image
files are needed. This is because the complicated formulas take into
account information that is not in the measurement file, but that
needs to be extracted from the images. The images are needed for
processing of Cassini and Lunar Orbiter data. When working with these
instruments, a list of images needs to be specified with the FROMLIST
argument.

PROGRAMMER: Ben Atkin

ParmDescriptionDefault
MATFROM
qmatch pixel measurement file
NONE
FROMLIST
List of image filenames
(Only needed for LO and ISS)
--
RANDTO
Output file (mm measurements)
NONE
TARGET
The target body  (e. g. Io)
NONE
RESFILE
A reseaux file.
--

ADDITIONAL NOTES:

ParmDescription
MATFROM
Pixel measurement data. Coordinates will be used to
estimate ground points.
FROMLIST
List of image filenames. May have paths relative to the
current directory, or absolute paths.
RANDTO
Output file, which will contain a priori data to be used
with randlsq.
TARGET
The name of the target. Can be a planet or moon.
RESFILE
A reseaux data file. If not specified, a default (in
$RUPGDATA) will be assumed.

Last updated: May 17 2005
File: pdfs2.html

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