ANSI-C program: thres_msk_pt.c
NAME
thres_msk_pt- generate a point mask based on thresholds of values
of a layer of a point data stack
SYNOPSIS
thes_msk_pt <plist> <pmask> <pdata>
<rec_num> <t_min> [t_max]
| <plist> | (input) point list (int) |
| [pmask] | (input) point data stack of mask values (uchar,
pmask[i]=0 excludes point i) (enter - for none) |
| [pdata] |
(input) point data stack
(must be float) |
| rec_num |
record number in input
point data stack (starting with 1) |
| t_min | minimum threshold value
(enter - for none) |
| t_max |
maximum threshold value
(enter - for none) |
EXAMPLE
thres_msk_pt pt msk psigma 1 .5 .9
Reads the input point list and the floating point data stack psigma, layer 1. All points in the psigma layer 1 with values between 0.5 and 0.9 have the associated mask value set to 1.
INSTALLATION
Source code thres_msk_pt.c in ./IPTA/src, executable version npt
in ./IPTA/bin
DESCRIPTION
This program is used to generate masks based on the floating
point values in a layer of a floating point data set. In the
example the standard deviation of the fit was used as a criterion
for selecting points. Using this mask, only those points that
meet the selection critereon can be used in later
processing.
OPTIONS
none.
SEE ALSO
ipta.h.