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en:processing:пороговая_фильтрация [2012/05/03 16:31] (current)
Анна Протопопова created
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 +===== Threshold filter =====
 +This feature is designed for sorting of points by height. In FemtoScan, filtering based on a single threshold is implemented.
 +To call up a threshold filter, select it from [[меню_математика|menu Mathematics]] or click on the button
 +In this case, a dialog box, where you can set the threshold level (as a fraction of the maximum image height) and determine how the points that appear above and below this level will be processed, will appear.
 +{{:​en:​processing:​Th_2.jpg |}} If a tick is put against field **Set above**, all points with height exceeding the threshold will be set to a value equal to the maximum height of the surface or the height of the threshold, depending on the selected parameter value. Similarly, if a tick is put against field **Set below**, the points that were initially below the threshold will have a minimum or threshold value. If no tick is put against any of these two options (for example, against **Set above**), these points will not be changed.