Patent ID: 7054036

Claim:
An image forming apparatus which reads a color image on an original and subjects the read image data to image processing, thus forming a color image, the apparatus comprising: a storage section which prestores a first filter coefficient set and a second filter coefficient set; a setting section which presets a sharpness adjustment code value in the image processing; a mode select section which selects an original mode; an instruction section which instructs start of an image forming operation in the image forming apparatus; a reading section which reads the color image on the original when the instruction section has issued a start instruction; an area discrimination section which discriminates an area of each of pixels of interest in the color image data read by the reading section; a calculation section which calculates, when the instruction section has issued the start instruction, filter coefficient values associated with areas discriminated by the area discrimination section, on the basis of the first filter coefficient set and second filter coefficient set stored in the storage section, the sharpness adjustment code value set by the setting section, and the original mode selected by the select section; a temporary storage section which temporarily stores the plural filter coefficient values calculated by the calculation section; a selection section which selects one of the plural filter coefficient values temporarily stored in the temporary storage section, on the basis of an area discrimination result of the area discrimination section; and a process section which performs a filtering process for the image data, using the filter coefficient value selected by the selection section.