Patent ID: 8902481
Filing Date: 2014-12-02
Classification: H04N

Abstract:
1. A method for document digitization, comprising: (a) generating a first image of a document sheet by irradiating the document sheet using a first light source and detecting the document sheet irradiated with light from the first light source using an image sensing unit, the document sheet having a marked portion that is marked with ink, the light from the first light source enabling detection of the ink on the document sheet by the image sensing unit, at least one property of the light from the first light source being converted by the ink on the document sheet such that a first trace corresponding to the ink on the document sheet is present in the first image; (b) generating a second image of the document sheet by irradiating the document sheet using a second light source and detecting the document sheet irradiated with light from the second light source using the image sensing unit, the light from the second light source having wavelength characteristics that differ from those of the light from the first light source, the light from the second light source enabling detection of content on the document sheet by the image sensing unit, a second trace corresponding to the ink on the document sheet being present in the second image; and (c) obtaining, using an image processing unit, a region of the second image that corresponds to the marked portion of the document sheet based on the first image, the image processing unit being configured to obtain the region of the second image based on the first trace in the first image and the second trace in the second image.