Changes between Version 37 and Version 38 of Tutorial/CorrelationImageVelocimetryOptimisation

Timestamp:

Mar 24, 2015, 1:02:03 PM (9 years ago)

Author:

vaillant1p

Comment:

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Tutorial/CorrelationImageVelocimetryOptimisation

@@ -6 +6 @@
 == Time interval ==
 The first parameter to adjust is the time interval between images, which should be sufficiently long to provide a displacement of a few pixels. The measurement precision is typically 0.2 pixel, so that a displacement of 4 pixels, as in the example, provides a relative precision of 5 %. A larger displacement would be preferable in terms of precision but may yield to poor image correlation and ’false vectors’. The choice of image pair is done in '''[!ListPairCiv1]'''.
+
+In our example we can only select 'dt=1' as we only have two images. In order to increase the time interval and select an increment in the PIV calculation we need multiple images.
 
 == Civ1 parameters ==