[QGIS-trac] [Quantum GIS] #1055: Contrast Enhancement defaults to Stretch to MinMax causing raster color shifts

[Quantum GIS]

#1055: Contrast Enhancement defaults to Stretch to MinMax causing raster color
shifts
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   Reporter:  starriver                         |              Owner:  nobody
       Type:  defect                            |             Status:  new   
   Priority:  major: does not work as expected  |          Milestone:        
  Component:  Rasters                           |            Version:  HEAD  
   Keywords:                                    |   Platform_version:        
   Platform:  OS X                              |           Must_fix:  No    
Status_info:  0                                 |  
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 When adding a raster layer, Raster Layer Properties>Symbology>Contrast
 Enhancement defaults to Stretch to MinMax and seems to stretch the colors
 based on the min max values in the bands. This happens with Custom Min Max
 Values not selected and without having selected Load Min Max Values From
 Band(s).

 In effect the system attempts, without being asked, to do a custom white
 balance on each added raster layer. The results can be quite strange with
 otherwise matched raster tiles.

 Please set the default to No Stretch or at least include a preference that
 would allow the user to make No Stretch the default.

 This may be the same underlying phenomenon described in ticket #996 where
 the colors of JPEG2000 files are changed dramatically.

 Let me know if I can further clarify this issue.

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/1055>
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