Patent ID: 8411326

Claim:
An image forming apparatus, comprising: an area tone setting device which sets an arbitrary tone correction table for each of image forming areas obtained by dividing a recording medium into a plurality of areas; a tone correction table storage device which stores tone correction tables set respectively for the image forming areas by the area tone setting device; an area judgment device which judges the image forming areas on which respective pixels constituting input image data are to be printed; a tone correction table selection device which selects from the tone correction table storage device one of the tone correction tables corresponding to the image forming area judged by the area judgment device; a tone correction device which performs tone correction of each pixel constituting the input image data, using the tone correction table selected by the tone correction table selection device; a density correction table storage device which stores a density correction table for each of nozzles of an inkjet head to be used when recording an image on the recording medium; and a tone correction table synthesis device which synthesizes a synthesized tone table by combining the tone correction table set by the area tone setting device and the density correction table, wherein the tone correction device carries out tone correction for respective pixels constituting the input image data by using the synthesized tone correction table.