Patent ID: 8159710
Filing Date: 2012-04-17
Classification: H04N

Abstract:
1. An image scanning apparatus that simultaneously scans a face-side image and a back-side image of an original with respect to two types of originals of a booklet type and a tablet type, the apparatus comprising: a face-side scanning unit configured to perform main scanning in a first direction along a main scanning direction and perform sub scanning in a predetermined direction along a sub scanning direction, thereby scan an image of a predetermined size at a time with respect to the face-side image of the original, and output the image of the predetermined size as a face-side image element having a predetermined data width; a back-side scanning unit configured to perform main scanning in a second direction parallel to the first direction and perform sub scanning in the predetermined direction along the sub scanning direction, thereby scan an image of the predetermined size at a time with respect to the back-side image of the original, and output the image of the predetermined size as a back-side image element having the predetermined data width; a face-side address calculating unit configured to calculate a memory address at which each of the face-side image elements should be stored according to the original type, with respect to each of the face-side image elements outputted from the face-side scanning unit; a back-side address calculating unit configured to calculate a memory address at which each of the back-side image elements should be stored according to the original type, with respect to each of the back-side image elements outputted from the back-side scanning unit; and an image data storage unit configured to store each of the face-side image elements and the back-side image elements to the memory address at which each element should be stored, and thereby store the face-side image and the back-side image; wherein the face-side scanning unit and the back-side scanning unit scan the image of the predetermined size synchronously with a synchronizing signal and simultaneously with each other; and the face-side address calculating unit and the back-side address calculating unit calculate the memory address at which each of the face-side image elements and each of the back-side image elements should be stored according to the original type, in such a manner that the face-side image and the back-side image to be stored in the image data storage unit have the same up-down direction and the same left-right direction.