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Ticket #759 (closed defect: fixed)

Opened 2012-10-19T15:45:29-05:00

Last modified 2012-11-07T17:17:35-06:00

Histogram should autoscale to hide rogue high values

Reported by: aivar Owned by: aivar
Priority: major Milestone: slimplugin2.0
Component: slim-plugin Severity: serious
Keywords: Cc:
Blocked By: Blocking:


Default operation of the Histogram Tool is to automatically fit the min/max values. This is not what the user wants most of the time. It would be better to zoom into the Gaussian-like distribution curve.

Change History

comment:1 Changed 2012-10-19T15:48:49-05:00 by aivar

The Histogram Tool is live during the creation of fitted images. I'm not sure the "zoom in to interesting part" function should be continuously active at this point. Perhaps it kicks in when the fit is complete.

comment:2 Changed 2012-11-07T17:17:35-06:00 by aivar

  • Status changed from new to closed
  • Resolution set to fixed

Added this capability:

During the creation of fitted images the "Adjust range to min/max values" checkbox is on by default.

Whenever you click this checkbox off the software does the "zoom in to interesting part" function. The user can further adjust the min/max LUT range by dragging or entering numbers.

The 'interesting part' of the histogram curve is derived by calculating quartiles Q1, Q2, & Q3 (Q2 is also known as the median). Then if IQR = Q3 - Q1, use the range Q1 - 1.5 x IQR to Q3 + 1.5 * IQR. This is a rule of thumb for determining outliers and seems to work well for this data.