UCMs are a extraction system that combines several types of low-level image information into a generic notion of segmentation scale. This system constructs a hierarchical representation of the image boundaries called Ultrametric Contour Map (UCM). Thresholding the resulting UCM (e.g. with a Global Thresholder) with some threshold k provides by definition a set of closed curves, the boundaries of the segmentation at scale k (from http://www.cs.berkeley.edu/~arbelaez/UCM.html).
Mode how to handle the selected column. The processed column can be added to a new table, appended to the end of the table, or the old column can be replaced by the new result
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