1. An image processing apparatus, comprising: an area determination unit configured to determine, upon acquiring a plurality of image data, whether a text area or an image area of one image data matches an initial text area or an initial image area that has initially appeared in another image data; an area processing unit configured to execute, when the text area or image area of the image data matches the initial text area or initial image area as a result of the determination, processing of reducing the image data of the matching text area or image area; and an area adjustment unit configured to generate image data which is a composite of the data-reduced area resulting from the processing, and a mismatched text area or image area.