Patent ID: 7046401

Claim:
A method for generating an electronic version of a document, the method comprising: receiving a plurality of digital, electronic images of the document; generating a corrected image from each received image; deriving one or more motion parameters for each pair of consecutive, corrected images, the motion parameters indicating the relative motion between the consecutive, corrected images, the motion parameters are derived by minimizing the sum of squares differences between each pair of consecutive images; aligning each image relative to the previous images based on the derived motion parameters; and blending each image into the previous images so as to produce the electronic version of the document; wherein the sum of squares differences is substantially given by the following equation: E = ∑ i , j ⁢ e 2 ⁡ ( i , j ) wherein, e(i, j)=I(i, j)−I′(i′, j′); and wherein (i, j) and (i′, j′) are corresponding pixel locations in a previous image and a current image, respectfully.