1 .TH GPIV_IMGPROC 1 "7 November 2006"
3 gpiv_imgproc \- Image processing program for (PIV) images.
10 [\fB-h\fR | \fB--help\fR]
11 [\fB-p\fR | \fB--print\fR]
12 [\fB-o \fIN\fR | \fB--operation \fIN\fR]
13 [\fB-t \fIN\fR | \fB--threshold \fIN\fR]
15 [\fB-v\fR | \fB--version\fR]
17 < \fIstdin\fR > \fIstdout\fR
23 \fBgpiv_imgproc\fP processes, filters or converts images in order to
24 improve the interrogation for Particle Image Velocimetry.
25 \fBgpiv_smooth\fR: smoothing filter,
26 \fBgpiv_hilo \fR: high-low filter,
27 \fBgpiv_clip\fR: clipping,
28 \fBgpiv_fft\fR: Fast Fourier Transform,
29 \fBgpiv_invfft\fR: Inverse Fast Fourier Transform,
30 \fBgpiv_highpass\fR: high-pass filtering
31 \fBgpiv_getbit\fR: get bit bumber.
32 \fBgpiv_mktestimg\fR: generates test image-pair for PIV
34 The parameters read from the configuration resources (containing the
35 key \fBGPIV_IMGPROC\fR) may be overruled by the command line options, as
41 In case of using \fBgpiv_getbit\fR \fIN\fP denotes the bit number [0, .., 7]
45 Image filter to be applied: make test image (\fIN\fR=0), smoothing
46 (\fIN\fR=1), high-low filtering (\fIN\fR=2), clipping (\fIN\fR=3), fft
47 (\fIN\fR=4), inverse fft (\fIN\fR=5), lowpass filter (\fIN\fR=8),
48 highpass filter (\fIN\fR=9), getbit (\fIN\fR=10).
51 \fB-h\fR | \fB--help\fP
55 \fB-o \fIN\fR | \fB--operation \fIN\fR
56 In case of using \fBgpiv_smooth\fR: set pixel equal to the mean of the
57 window value (\fIN\fR0), subtract mean from from pixel (\fIN\fR1) add
58 (\fIN\fR2), multiply (\fIN\fR3) or divide (\fIN\fR4)
61 \fB-t \fIN\fR | \fB--threshold \fIN\fR
62 In case of using \fBgpiv_clip\fR: threshold value to be set to zero
65 \fB-v\fR | \fB--version\fP
66 Print version information on standard output, then exit successfully.
70 window size (default: 15)
74 Input image filename. Overrides \fIstdin\fR and \fIstdout\fR with the full \fIfilename\fR of
75 the image. Output will be written to \fIfilename\fB.png\fR. Parameters
76 are stored in \fIfilename\fB.par\fR and may be used for future use by
77 including them in \fI./gpivrc\fR. If \fIstdin\fR and \fIstdout\fR are
78 used, the input is expected to be a PNG formatted image.