qgis - Normalize raster values to 0-255

I need to normalize the values attained from a band ratio to 0-255. I'm using QGIS. How do I do this? Any ideas?

Answer

You can use gdal_translate utility. Use the option -scale [src_min src_max [dst_min dst_max]] with src_min and src_max as current min/max values from your data and 0,255 as dst_min,dst_max. Without the square brackets.

If you have installed QGIS with OSGeo4W package, you may have the terminal program called 'MSYS'. Open that and just use the gdal_translate command. If not, from within QGIS choose Raster -> Conversion - > Translate. Choose your files and options. At the bottom of the window the full gdal_translate command will be displayed. Click edit and add the -scale option.