[chimerax-users] map segmentation

[Tom Goddard]

Hi Dmitry,

  You select the segmented region you want to split by ctrl-click on it.  Then you press the Ungroup button in the Segment Map (aka Segger) panel.  If it does not split it and the log says "Ungrouped to 0 regions" then that is the finest granularity Segger computed.  The algorithm finds a segment for each local maximum of the smoothed map, so the region probably had just one local maximum.  If you want to split you could try segmenting with different smoothing or grouping options.

  There are examples using Segger and a paper from its author Greg Pintilie if you want to learn more about how it works.

	https://people.csail.mit.edu/gdp/segger/docs_segmenting.html

  Tom


> On Mar 17, 2022, at 1:24 AM, Dmitry Semchonok via ChimeraX-users <chimerax-users at cgl.ucsf.edu> wrote:
> 
> Dear colleagues,
> 
> Fast questions.
> 
> 1. How to segment the selected segment?
> 
> So I have 
> a) segmented the map using the segment map tool
> b) selected 1 piece. 
> b) I want to segment that selected piece on the smaller parts
> 
> 
> 2. how to increase the threshold of the segmented map?
> 
> 
> 
> Thank you
> 
> Kind regards,
> Dmitry
> 
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