Changes between Version 29 and Version 30 of Tutorial/AdvancedParticleImagingVelocimetry2


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Timestamp:
Jan 19, 2015, 2:14:00 PM (9 years ago)
Author:
vaillant1p
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  • Tutorial/AdvancedParticleImagingVelocimetry2

    v29 v30  
    1313
    1414= Sub_background =
    15 We observe parasitic light rays on the images which correspond to fixed features, leading possibly to spurious velocity vectors equal to 0. To eliminate those we use '''sub_bacground'''.
     15We observe parasitic light rays on the images which correspond to fixed features, leading possibly to spurious velocity vectors equal to 0. To eliminate those we use '''sub_background'''.
    1616In the GUI uvmat, select '''Run/field series'''. Then select the program 'sub_background'. This function is not provided in the default menu, so you need to use the last menu option 'more...', and select the function in the sub-folder 'series/' of the package uvmat. This option is then preserved in the menu for later use.
    1717Then run '''sub_background''' over the whole index range in i and j, using the default parameters. Answer Yes to the question 'apply levels', which will conveniently rescale the image brightness after background removal.