Patent ID: 7142733

Claim:
A method of processing a document comprising: an output step for outputting a document file in dot characters or in a gray color image, each character of the document file is printed by a plurality of dots in dot characters or in a gray image, which has the densities of which each dot of the character is independent or becomes independent by erosion processing; an input step for inputting a correction inputted document in which a correction sign is inputted to a document outputted by said output step; a character location detection step for detecting a location of a character written with the correction sign in the correction inputted document inputted by said input step; a correction recognition step for recognizing said correction sign about the correction inputted document inputted by said input step, by carrying out a erosion proceeding to erase the dot characters and extracting the correction, or by obtaining connected components of pixels and extracting the correction sign on the basis of the obtained number of pixels of the connected components; a correspondence making step for making the location of the character detected by said character location detection step correspond to the correction sign recognized by said correction recognition step; and a correction step, according to the correspondence made by said correspondence making step, for correcting a corresponding character by correction processing corresponding to the correction sign recognized by said correction recognition step.