Data type conversion
From AWF-Wiki
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We may change the data type (or radiometric resolution) of a raster layer. | We may change the data type (or radiometric resolution) of a raster layer. | ||
| − | # Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select a single band file ''/ | + | # Click the {{button|text=Add raster layer}} [[Image:QGIS_2.0_addrast.png|20px]] and select a single band or a multiband file ''dop/DOP_VI.tif''. This is multiband file wit three different spectral indices created by {{button|text=Orfeo Toolbox --> Feature Extraction --> Radiometric Indices)}} with the data type '''Float''' (Check the [[Raster metadata]]). We would like to convert to data type '''Byte - eight bit unsigned integer''', value range 0 to 255. |
# Click {{button|text=Open}}. | # Click {{button|text=Open}}. | ||
| − | # In processing toolbar, type {{typed|text= | + | # 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}} | ||
| + | # Click '''Advanced parameters''' and define Output pixel type {{button|text=uint8}}. | ||
| + | # Click {{button|text=Run}}. | ||
[[File:Qgis_rescale.png|400px]] | [[File:Qgis_rescale.png|400px]] | ||
| − | The output Image raster is now recoded to | + | The output Image raster is now recoded and saved to unsigned eight bit. |
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[[Category:Working with Raster Data]] | [[Category:Working with Raster Data]] | ||
Revision as of 09:42, 21 June 2019
We may change the data type (or radiometric resolution) of a raster layer.
- Click the Add raster layer
and select a single band or a multiband file dop/DOP_VI.tif. This is multiband file wit three different spectral indices created by Orfeo Toolbox --> Feature Extraction --> Radiometric Indices) with the data type Float (Check the Raster metadata). We would like to convert to data type Byte - eight bit 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.
