1. An image reading apparatus capable of separating pages of images, the image reading apparatus comprising: a housing; an automatic sheet feeder connected to the housing, the automatic sheet feeder comprising a document passageway, the document passageway having an opening, the automatic sheet feeder being for transporting a first document and a second document along the document passageway and past the opening; a separation reference sheet disposed in the opening, the separation reference sheet comprising a specific portion; a scanning module, disposed in the housing and disposed at a position opposite the separation reference sheet, for scanning the first document and the second document, transported past the opening, to generate a continuous image; and an image processing unit, coupled to the scanning module, for receiving the continuous image and processing the continuous image into a first document image corresponding to the first document and a second document image corresponding to the second document according to a specific image comprising the specific portion.