Patent ID: 6829384
Filing Date: 2004-12-07
Classification: G06K,G06T

Abstract:
A method to detect presence of a 3D (three dimensional) object in a 2D (two dimensional) image containing a 2D representation of said 3D object, said method comprising:receiving a digitized version of said 2D image; selecting one or more view-based detectors; for each view-based detector, computing a wavelet transform of said digitized version of said 2D image, wherein said wavelet transform generates a plurality of transform coefficients, and wherein each transform coefficient represents visual information from said 2D image that is localized in space, frequency, and orientation; applying said one or more view-based detectors in parallel to respective plurality of transform coefficients, wherein each view-based detector is configured to: compute a likelihood ratio based on visual information received from corresponding waveform coefficients; compare said likelihood ratio to a predetermined threshold value; and detect a specific orientation of said 3D object in said 2D image based on said comparison of said likelihood ratio to said predetermined threshold value; combining results of application of said one or more view-based detectors; and determining orientation and location of said 3D object from said combination of results of application of said one or more view-based detectors.