A image processing device has a reading unit, a graphics area extraction unit, a writing area extraction unit, a character string extraction unit and an association unit. The reading unit reads a document. The graphics area extraction unit extracts a graphics area from the document read by the reading unit. The writing area extraction unit extracts a writing area from the document read by the reading unit. The character string extraction unit extracts a character string presented in the graphics area. The association unit associates information of the writing area with the graphics area based on the character string extracted by the character string extraction unit.