Data type conversion

Revision as of 14:13, 23 October 2019

We may change the data type (and radiometric resolution) of a raster layer.

Click the Add raster layer and select a multiband file e.g. /geodata/lucc/s2/Subset_S2A_MSIL2A_20170619T_MUL.tif. This is multiband file with data type uint16. Convert to data type uint8 (8bit unsigned integer), value range 0 to 255.
Click Open.
In processing toolbar, type dynamic into the search field to find the Orfeo Toolbox --> Image Manipulation --> DynamicConvert tool.
Open with a double click. Specify the input and a new output file name as shown in the screenshot.
Set High cut quantil and Low cut quantile to 0
Click Advanced parameters and define Output pixel type uint8.
Click Run.

The output Image raster is now recoded and saved to unsigned eight bit.

@@ Line 2: / Line 2: @@
 # Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select a multiband file e.g. ''/geodata/lucc/s2/Subset_S2A_MSIL2A_20170619T_MUL.tif''. This is multiband file with data type '''uint16'''. Convert to data type '''uint8 (8bit unsigned integer)''',  value range 0 to 255.
 # Click {{button|text=Open}}.
-# In processing toolbar, type {{typed|text=dynamic}} into the search field to find the {{button|text=Orfeo Toolbox --> Image Manipulation --> DynamicConvert)}} tool.
+# In processing toolbar, type {{typed|text=dynamic}} into the search field to find the {{button|text=Orfeo Toolbox --> Image Manipulation --> DynamicConvert}} tool.
 # Open with a double click. Specify the input and a new output file name as shown in the screenshot.
 # Set High cut quantil and Low cut quantile to {{typed|text=0}}