IPTA Reference Manual: thres_im_pt

GAMMA Interferometric Point Target Analysis Software (IPTA): Reference Manual

thres_im_pt

NAME
thres_im_pt - generate point list containing coordinates of image points that satisfy constraints

SYNOPSIS
thres_im_pt <f_in> <width> <plist> <t_min> <t_max> <rlks> <azlks>

<f_in>	(input) 2-D image data file (float)
<width>	number of samples/row of f_in
<plist>	(output) point list of coordinates of all non-zero points (int)
<t_min>	minimum threshold value (enter - for none)
<t_max>	maximum threshold value (enter - for none)
<rlks>	number of range looks in the sampled data geometry
<azlks>	number of azimuth looks in the sampled data geometry

EXAMPLE
thres_im_pt cc 1750 pt_cc .5

generates a point list containing the pixel coordinates of all points in file cc that have values greater than or equal to 0.5. Each line off the file cc has 1750 values.

INSTALLATION
Source code thres_im_pt.c in ./src, executable version thres_im_pt in ./bin.

DESCRIPTIONthres_im_pt generates a point list of pixel coordinates in the input file f_in that are greater than or equal to t_min and less than or equal to t_max. The input data file f_in must be in float format (32-bit floating point). If a - is put in place of either t_min or t_max, that constraint is not considered.

This program is useful for determining point target candidates from a data file contain spectral coherence information generated by sp_stat. It is also possible to use averaged spectral coherence information generaged by applying sp_stat to a stack of coregistered SLC images and averaging the indivdual output files using ave_image. Another application is to use this program to generate a point list from the standard interferometric correlation evaluated on a raster using the ISP program cc_wave

OPTIONS
none.

SEE ALSO
ave_image, sp_stat