Changes between Version 5 and Version 6 of Tutorial/DisplacementMeasuredByImageCorrelation

Timestamp:

Jan 24, 2015, 11:41:52 PM (9 years ago)

Author:

sommeria

Comment:

--

Tutorial/DisplacementMeasuredByImageCorrelation

@@ -1 +1 @@
 [[TracNav(Tutorial/TOC)]]
+
 = [wiki:Tutorial] / Displacement Measured by Image Correlation =
+This demo shows how to use image correlation to measure a displacement versus time (instead of velocity). Open the image UVMAT_DEMO06_displacement (accessible on http://servforge.legi.grenoble-inp.fr/pub/soft-uvmat/).
 
-This demo shows how to use image correlation to measure a displacement versus time (instead of velocity).
-Open the image UVMAT_DEMO06_displacement (accessible on http://servforge.legi.grenoble-inp.fr/pub/soft-uvmat/).
+'''Looking at the images:'''
 
-Open an image UVMAT_DEMO06_displacement. This is a target pattern used to measure the displacement of a plate vs time.
+Open an image UVMAT_DEMO06_displacement. This is a target pattern used to measure the displacement of a plate vs time. Observe the motion by scanning the images. 
 
-Majke a mask, like explained for tutorial 
+Make a mask to remove the outer part in the PIV processing, like explained for tutorial 5, or introduce the mask provided .ref (selecting the upper bar button .. in uvmat)
 
-Oben series/civ_series. import Config for ref file, .ref . 
+'''Civ in mode 'displacement':'''
+
+Open series/civ_series. import Config for ref file, .ref . The appropriate parameters are displayed:
+
+ * mode displacement, with respect the origin index 1 (first image)
+ * Correlation box fairly large 31 corresponding to a coarse pattern, and considering that spatial resolution is not critical.
+ * Large search 107 need to capture the max displacement
+ * !!CorrSmooth =2 corresponding top carse 'particles': large correlation curves. See ! TestCiv1.
+ * Mask selected to isolate the active area
+ * Fairly large ! FieldSmooth (spatial resolution not critical) and no 'deformation' needed for civ2
+ * Civ2 smaller search zone as we start form  the prediction of Civ2 (shift)
+
+'''Observing the civ data:''' 
+
+velocity, vorticity, div 
+
+'''Time series:'''
+
+Make a point, range=200, and run series/time series. Observe the curve displacement U and V versus time. 
+
++ rotation + div