Patent ID: 7660458
Filing Date: 2010-02-09
Classification: G06T,H04N

Abstract:
1. A method, comprising: projecting an unstructured pattern onto a target object using a projector, wherein the target object is a pair of pages of a multi-page document; capturing a pair of stereoscopic images of the unstructured pattern projected onto the target object, wherein one or more stereoscopic cameras capture the pair of stereoscopic images; generating respective lines in each of the stereoscopic images; vertically rectifying the pair of stereoscopic images relative to each other to align the respective lines; performing signal processing on the pair of stereoscopic images to horizontally cross-correlate portions of the pair of stereoscopic images in order to identify corresponding portions in the pair of stereoscopic images, wherein the signal processing is performed utilizing the image data from the stereoscopic images without specification of the pattern; capturing a pair of readable images each conveying the content of one of the pair of pages, wherein one or more cameras that are different from the one or more stereoscopic cameras capture the pair of readable images; and compensating for distortion in the pair of readable images by transforming the pair of readable images with an output of the signal processing, wherein performing signal processing includes dividing a first of the two stereoscopic images into regions, a plurality of regions forming each line, each region having a width that is greater than its height and wherein the performing signal processing is performed for each region of the first stereoscopic image.