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)