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