Abstract: An image processing apparatus comprises an image input device, an image output device and a processing unit. The processing unit coupled to the image input device and the image output device acquires a plurality of first bitmap image via the image input device, generates a second bitmap image by merging the first bitmap images, generates a third bitmap image by reducing the second bitmap image and prints the third bitmap image via the image output device, wherein each first bitmap image corresponds to a portion of a printed page.