1osiv(1) General Commands Manual osiv(1)
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6 osiv - open source imaging velocimetry
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9 osiv [ arg=... ] [ ppr=... ] [...]
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12 osiv is a program for performing efficient analysis of PIV
13 images. It provides a variety of algorithms for pre-process‐
14 ing, interpolation, and cross-correlation of images. This page
15 will serve as a quick reference location, more information can
16 be found in the online manual.
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19 prn=STRING - parameter file name
20 mvn=STRING - movie file name
22 The movie type will be inferred from the file extension,
23 namely:
24 .dat - binary data
25 .tif - TIFF file
26 .tiff - TIFF file
27 If file is "-", data will be read from stdin and assumed
28 to be raw binary.
29 dtn=STRING - output file name
31 If file is "-", data will be written to stdout.
32 alg=INTEGER - cross-correlation algorithm
34 The integer takes the following interpretation:
35 1 - Direct Least Squares
36 2 - Direct Least Squares (Non-Redundant)
37 3 - Direct Cross Correlation
38 4 - Direct Cross Correlation (Non-Redundant)
39 5 - FFT Cross Correlation
40 6 - FFT Cross Correlation (Less-Redundant)
41 7 - Minimum Quadratic Difference
42 8 - Iterative FFT Correlation
43 ppr=INTEGER - pre-processing algorithm
45 The integer takes the following interpretation:
46 0 - No pre-processing
47 1 - Subtract to minima
48 2 - Add to maxima
49 3 - Stretch to limits
50 4 - Stretch to variance
51 5 - Stretch to average
52 itp=INTEGER - interpolation algorithm
54 The integer takes the following interpretation:
55 0 - No interpolation
56 1 - Gaussian
57 2 - Parabolic
58 3 - Paraboloidal
59 4 - Centroid
60 szx=INTEGER - image width
62 szy=INTEGER - image height
64 stx=INTEGER - x start of grid
66 A value of zero denotes the left of the image.
67 sty=INTEGER - y start of grid
69 A value of zero denotes the top of the image.
70 spx=INTEGER - x grid spacing
72 A value of one places a window at every pixel column.
73 spy=INTEGER - y grid spacing
75 A value of one places a window at every pixel row.
76 nmx=INTEGER - x grid length
78 nmy=INTEGER - y grid length
80 ofx=INTEGER - x window offset
82 ofy=INTEGER - y window offset
84 wsx=INTEGER - x window size
86 Powers of two allow efficient FFT algorithms, but are
87 not necessary.
88 wsy=INTEGER - y window size
90 Powers of two allow efficient FFT algorithms, but are
91 not necessary.
92 wlx=INTEGER - x super window size
94 This argument only has meaning for the minimum quadratic
95 difference algorithm.
96 wly=INTEGER - y super window size
98 This argument only has meaning for the minimum quadratic
99 difference algorithm.
100 mdx=INTEGER - x maximum window displacement
102 mdy=INTEGER - y maximum window displacement
104 sfr=INTEGER - start frame
106 efr=INTEGER - end frame
108 skp=INTEGER - frame skipping
110 set=INTEGER - frame set
112 nit=INTEGER - number of iterations
114 This argument only has meaning for iterative fft cross
115 correlation.
116 wsd=STRING - wisdom file name
118 Wisdom can be generated by the program osiv_mkwsd
119 wmp=INTEGER - write map switch
121 A value of "1" denotes "yes", a value of anything else
122 denotes "no". The default value is "no".
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125 osiv_getargs(1), osiv_getvects(1), osiv_getmap(1),
126 osiv_draw(1), osiv_mkwsd(1), readovd(1).
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129 Let me know, my email address is jamesas@uclink.berkeley.edu.
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132 Copyright © 2002 James Strother.
133 local osiv(1)