r.quant
r.quant - Produces the quantization file for a floating-point map.
Raster (r.*)
ParameterMultipleInput|input|Raster map(s) to be quantized|1.0|False
ParameterRaster|basemap|Base map to take quant rules from|False
ParameterRange|fprange|Floating point range: dmin,dmax|0,1
ParameterRange|range|Integer range: min,max|1,255
ParameterBoolean|-t|Truncate floating point data|False
ParameterBoolean|-r|Round floating point data|False