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Hi,
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Hi all,
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GPIV_IMGPROC(1) General Commands Manual GPIV_IMGPROC(1)
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] [file-
name] < 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. Param-
eters 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)
