Method and system for detecting changes in three dimensional...

Details Method and system for detecting changes in three dimensional... Method and system for detecting changes in three dimensional...

2005-11-08

2005-11-08

Ahmed, Samir (Department: 2623)

Image analysis

Applications

3-d or stereo imaging analysis

C345S419000

Reexamination Certificate

active

06963662

ABSTRACT:
The present invention provides a method for reliably detecting change in the 3-D shape of objects. It uses an estimate of the accuracy of the 3-D models derived from a set of images taken simultaneously. This accuracy estimate is used to distinguish between significant and insignificant changes in 3-D models derived from different image sets. In one embodiment of the present invention, the accuracy of the 3-D model is estimated using self-consistency methodology for estimating the accuracy of computer vision algorithms. In another embodiment of the present invention, resampling theory is used to compare the mean or median elevation for each change in the models. This methodology allows for estimating, for a given 3-D reconstruction algorithm and class of scenes, the expected variation in the 3-D reconstruction of objects as a function of viewing geometry and local image-matching quality (referred to as a “score”). Differences between two 3-D reconstructions of an object that exceed this expected variation for a given significance level are deemed to be due to a change in the object's shape, while those below this are deemed to be due to uncertainty in the reconstructions.

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patent: 6539107 (2003-03-01), Michael et al.

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