IMAGE PROCESSING APPARATUS AND METHOD FOR PERFORMING SHADE CORRECTION ON GENERATED IMAGE USING A SHADING COEFFICIENT

Generation of an electronic document which leaves density difference information between the background of a document and a correcting liquid applied surface is in demand. Hence, upon reading a document image and converting it into an electronic document, the background density of the document is read from the read image, and a lower density region having a density lower than the background density is extracted from the read image using the background density.