NAME

       gpiv_imgproc - Image processing program for (PIV) images.

SYNOPSIS

       gpiv_imgproc [-b N] [--filter N] [-h | --help] [-p | --print] [-o N | --operation N] [-t N
       | --threshold N] [-w N] [-v | --version] [filename] < stdin > stdout

DESCRIPTION

       gpiv_imgproc processes, filters or converts images in order to improve  the  interrogation
       for  Particle  Image  Velocimetry.   gpiv_smooth:  smoothing  filter, gpiv_hilo : high-low
       filter, gpiv_clip: clipping, gpiv_fft: Fast Fourier Transform, gpiv_invfft: Inverse   Fast
       Fourier  Transform,  gpiv_highpass:  high-pass  filtering  gpiv_getbit:  get  bit  bumber.
       gpiv_mktestimg: generates test image-pair for PIV

       The parameters read from the configuration resources (containing the key GPIV_IMGPROC) may
       be overruled by the command line options, as explained below.

Options

       -b N   In case of using gpiv_getbit N denotes the bit number [0, .., 7]

       --filter N
              Image  filter  to  be  applied:  make  test  image (N=0), smoothing (N=1), high-low
              filtering (N=2), clipping (N=3), fft  (N=4),  inverse  fft  (N=5),  lowpass  filter
              (N=8), highpass filter (N=9), getbit (N=10).

       -h | --help
              On-line help

       -o N | --operation N
              In case of using gpiv_smooth: set pixel equal to the mean of the window value (N0),
              subtract mean from from pixel (N1) add (N2), multiply (N3) or divide (N4)

       -t N | --threshold N
              In case of using gpiv_clip: threshold value to be set to zero

       -v | --version
              Print version information on standard output, then exit successfully.

       -w N   window size (default: 15)

       filename
              Input image filename. Overrides stdin and stdout with  the  full  filename  of  the
              image.   Output   will  be  written  to  filename.png.  Parameters  are  stored  in
              filename.par and may be used for future use by including them in ./gpivrc. If stdin
              and stdout are used, the input is expected to be a PNG formatted image.

       SEE ALSO
              gpivtools

AUTHOR

       Gerber Van der Graaf

                                         7 November 2006                          GPIV_IMGPROC(1)