1 .TH GPIV 1 "10 July 2003"
3 gpiv \- Analyzes images obtained from a fluid flow by Particle Image
11 [\fB-b\fR | \fB--bins \fIBINS\fR]
12 [\fB-c\fR | \fB--columns \fINCOLUMNS\fR]
13 [\fB-r\fR | \fB--rows \fINROWSS\fR]
14 [\fB-r\fR | \fB--rows \fINROWSS\fR]
15 [\fB--display_img1\fR]
16 [\fB--display_img2\fR]
17 [\fB--display_intregs\fR]
20 [\fB--display_sstrain\fR]
21 [\fB--display_nstrain\fR]
24 [\fB-p\fR | \fB--print\fR]
26 [\fB--proc_gradient\fR]
27 [\fB--proc_resstatst\fR]
29 [\fB--proc_peaklock\fR]
30 [\fB--proc_average\fR]
32 [\fB--proc_substract\fR]
33 [\fB--proc_vorstra\fR]
34 [\fB-z\fR | \fB--zoomscale \fISCALE\fR]
35 [\fB-t\fR | \fB--tooltips\fR]
36 [\fB--view_gpivbuttons\fR]
37 [\fB--view_tabulator\fR]
43 \fBgpiv\fP is a graphic user interface program for analyzing images
44 obtained from a fluid flow that has been seeded with tracer particles
45 by the so-called Particle Image Velocimetry (PIV) technique. It allows
46 to have a quick overview of the process settings, easily changing
47 them, running the processes, visualizing and optimizing their results
48 in an interactive way. The processes that may be performed are image
49 evaluation or interrogation (resulting into PIV estimators),
50 validation and post-processing of the PIV estimators.
52 The settings for the PIV processes are subsequently searched in
53 \fI/etc/gpivrc\fP (system wide) or in \fI~/.gpivrc\fR. Each PIV
54 process setting is described by the process key (EVAL, VALID or
55 POST) and the parameter name, separated by a dot (.), followed by its
56 value. Some of the parameters are optional. The parameters may be
57 defined in arbitrary order. Blank lines and comment (starting with a
58 pound sign (#) at the first column) may be included in the parameter
61 The parameters and options to be used for \fBgpiv\fP are retrieved
62 from ~/.gnome/gpiv or default settings are to be used if absent. The
63 settings may be changed or updated by menu->settings->preferences and
64 pressing the OK-button. The parameter settings of \fBgpiv\fP (not the
65 PIV process settings) may be overruled by the command line options, as
71 On-line help. Besides the options of \fBgpiv\fP it also shows
72 the additional GNOME, GTK and GNOME GUI options.
76 Display a brief usage message.
79 \fB-b | --bins \fIBINS\fR
80 Number of bins for histograms of estimators at sub-pixel level,
81 performed by the peaklock process and of the median residues,
82 performed by the errvec process.
85 \fB-c\fR | \fB--columns \fINCOLUMNS\fR
86 Number of columns in the images. \fINCOLUMNS\fR is limited by the
87 program as defined in gpiv_gtk.h or by ./configure during the building
88 of \fBgpiv\fR. Its maximum setting can be found in the Preferences.
91 \fB-r\fR | \fB--rows \fINROWSS\fR
92 Number of rows in the images. \fINROWS\fR is limited by the program as
93 defined in gpiv_gtk.h or by ./configure during the building of
94 \fBgpiv\fR. Its maximum setting can be found in the Preferences.
98 Enables displaying of the first image of a PIV image pair (not working
99 in the current version!).
103 Enables displaying of the second image of a PIV image pair (not working
104 in the current version!).
107 \fB--display_intregs\fR
108 Enables displaying of interrogation regions.
112 Enables displaying of PIV data.
116 Enables displaying of vorticity data.
119 \fB--display_sstrain\fR
120 Enables displaying of shear strain data.
123 \fB--display_nstrain\fR
124 Enables displaying of normal strain data.
128 Save data in HDF5 format with .gpi extension.
132 Include image data in .gpi file (HDF5 format).
135 \fB-p\fR | \fB--print\fR
136 Print process parameter settings to stdout.
140 Includes piv in the chain-process.
143 \fB--proc_gradient\fR
144 Includes gradient in the chain-process.
147 \fB--proc_resstatst\fR
148 Includes resstats in the chain-process.
152 Includes validate in the chain-process.
155 \fB--proc_peaklock\fR
156 Includes peaklock in the chain- process.
160 Includes average in the chain-process.
164 Includes scaling in the chain-process.
167 \fB--proc_substract\fR
168 Includes substract in the chain-process.
172 Includes vorticity in the chain-process.
175 \fB-z\fR | \fB--zoomscale \fISCALE\fR
178 \fISCALE\fR = 0: magnification factor = 0.5,
179 \fISCALE\fR = 1: magnification factor = 0.83,
180 \fISCALE\fR = 2: magnification factor = 1.0,
181 \fISCALE\fR = 3: magnification factor = 1.3,
182 \fISCALE\fR = 4: magnification factor = 1.6,
183 \fISCALE\fR = 5: magnification factor = 2.0.
186 [\fB-t\fR | \fB--tooltips\fR]
191 [\fB--view_gpivbuttons\fR]
193 View the \fBgpiv\fR buttons of the application.
196 [\fB--view_tabulator\fR]
198 View the tabulator of the application containing all PIV process
202 On-line documentation from the help-menu