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gpiv_aint(1) [debian man page]

GPIV_AINT(1)						      General Commands Manual						      GPIV_AINT(1)

gpiv_aint - Calculates mean image intensity at each interrogation area. SYNOPSIS
gpiv_aint [-h | --help] [-p | --print] [-s | --second] [-V | --verbose] [-v | --version] filename DESCRIPTION
For each Interrogation Area of an image, gpiv_aint calculates the mean image intensity. Depending on the settings of the interrogation scheme, the Interrogation Area's may be shifted with magnitude of the piv estimators (if they exist) or the image may be deformed before the intensity is calculated. This program uses the IMG, PIV and POST parameters. The default settings may be overruled by the command line options, as explained below. Options -h | --help On-line help. -p | --print Prints parameters to stdout. -s | --second Calculates the image intensitites for the second image frame in case of double-frame image pairs. -V | --verbose Prints data of interrogation area's and resulting mean. -v | --version Print version information on standard output, then exit successfully. filename Full name of the image file. Image format might be: png, raw binary (.r), hdf5 (.hdf), gif, tif, bmp or pgm. The piv estimators are read from filename.piv The settings are written to filename.par. output will be stored in filename.ain. SEE ALSO gpivtools NOTES
The program uses netpbm. AUTHOR
Gerber Van der Graaf 7 November 2006 GPIV_AINT(1)

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GPIV_SCALE(1)						      General Commands Manual						     GPIV_SCALE(1)

gpiv_scale - Scaling of PIV data. SYNOPSIS
gpiv_scale [-h | --help] [-p | --print] [-s M |-S M] [-t dT |-T dT] [-v | --version] [-zp x0 y0] [-zv x0 y0] [filename] < stdin > stdout DESCRIPTION
gpiv_scale applies the image magnification and the time between successive recordings to the PIV estimators. This results that particle displacements [px] are modified to velocities [m/s] and their positions from [px] to [m]. A physical reference for the positions of the PIV data can be applied by means of the image zero-offset option. If filename is used, the parameters and options to be used for gpiv_scale are subsequently read from the image header (filename.h in case of raw binary images) or from the configuration resources (containing the IMG and POST keys). The parameters may be overruled by the com- mand line options, as explained below. Options -h | --help On-line help. -p | --print Prints parameters, command line options and input and output filenames to stdout. The output is identic of filename.par, in case -f is used. -s M spatial scaling with magnification factor M [m/px] -S M Inverse spatial scaling with magnification factor M [m/px]; returns scaled data to their original magnitudes. -v | --version Prints version information on standard output, then exits successfully. -t dT Translates particle displacements into velocities by devising them with the time between subsequent recordings dT [s]. -T dT Inverse time scaling. Returns velocities into displacements [px] [-z x0 y0] Relates the positions of the observations of velocities/displacements to a physical location in the experiment by image zero offset- ting. x0 y0 denote the physical position of pixel (0,0) in the image. filename Input PIV file. Overrides stdin and stdout. The output will be written to Parameters are stored in filename.par and may be used for future use by including them in ./gpivrc. SEE ALSO gpivtools NOTES
Gerber Van der Graaf BUGS
The program has been tested for PIV data. So far, no bugs have been found. 8 November 2006 GPIV_SCALE(1)
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