Disclosed is a method, system, and program for modifying raster pel data according to different types of filtering operations. At least two tables are maintained in memory. At least two of the tables provide output pel values for at least two different types of filtering operations based on input pet values. A plurality of pets are read from raster data for a print job. A determination is made of an entry in one table based on the plurality of read pels to determine at least one output pet value that accomplishes the filtering operation associated with the table. At least two of the tables may be used in the same page of raster data to perform the different filtering operations associated with the at least two tables used within one page. The at least one output pel value is used to generate a pulse to control a printer apparatus.