Compensating for distortion in digital images

Details Compensating for distortion in digital images Compensating for distortion in digital images

2011-07-05

2011-07-05

Le, Brian Q (Department: 2624)

Image analysis

Applications

3-d or stereo imaging analysis

Reexamination Certificate

active

07974463

ABSTRACT:
Systems and methods using an unstructured pattern for three-dimensional model construction, such as may be used for processing images of documents are disclosed. The method generally includes projecting an unstructured infrared pattern onto a target object, capturing a pair of stereoscopic images of the pattern projected onto the target object, such as with infrared cameras, performing signal processing on the pair of stereoscopic images to cross-correlate portions of the stereoscopic images in order to identify corresponding portions in the stereoscopic images, and constructing a three-dimensional model of the target object. The three-dimensional model can be utilized to rectify, e.g., de-warp, an image of the target object, e.g., a page or both facing pages of a bound document.

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