Patent ID: 8179436

Claim:
Method for the scanning of a document by means of a line camera wherein the line camera has at least two parallel scan lines arranged at a distance s from one another, and a lens with an imaging scale M, comprising the following steps: line-by-line scanning of the document by the line camera, wherein by means of each scan line a separate image of the document is generated, with the images being offset from one another by the distance s between the scan lines, and the images being divided into a multiplicity of lines, wherein the distance D between two adjacent lines of an image in the image plane of the line camera is D = v t · t z M wherein v t is the speed at which the line camera is moved relative to the object, and t z the interval of time between two consecutive exposures by one of the scan lines, so that an offset Z of the two images in the unit of line spacing D is Z=s/D bringing into congruence the two images by shifting at least one of the images relative to the other image by Int(Z) lines to reduce the offset, and interpolation of one of the images at lines offset by (Z−Int(Z)).