Patent ID: 7777920

Claim:
An image copier comprising a scanner configured to read an image and a printer configured to form the image on a sheet, wherein said scanner includes: a document table configured to position an original document from which an image is to be read; a document holding cover configured to hold the original document on the original document table and which has a light-emitting element for detecting the size of an original document which emits light when the size of the original document is detected; a light source configured to irradiate the original document with light when an image on the original document is read; a light-receiving element for image reading which receives reflected light from the original document; a controller for the light-emitting element for detecting the size of an original document which controls the light-emitting element for detecting the size of the original document; a specific region determination unit configured to identify a specific region based on the numbers of pixels in a main scanning direction and a sub scanning direction of image data; and a background correction unit configured to perform a process of correcting the background of an image which has been read.