6533b86ffe1ef96bd12cd4a8
RESEARCH PRODUCT
Rotation-invariant optical recognition of three-dimensional objects.
Carlos FerreiraJosé J. Esteve-taboadaJavier Garciasubject
Line-of-sightbusiness.industryComputer scienceMaterials Science (miscellaneous)Cognitive neuroscience of visual object recognitionImage processingGratingInvariant (physics)Industrial and Manufacturing Engineeringsymbols.namesakeOpticsFourier transformsymbolsSpatial frequencyBusiness and International ManagementbusinessPhase modulationdescription
An automatic method for rotation-invariant three-dimensional (3-D) object recognition is proposed. The method is based on the use of 3-D information contained in the deformed fringe pattern obtained when a grating is projected onto an object’s surface. The proposed method was optically implemented by means of a two-cycle joint transform correlator. The rotation invariance is achieved by means of encoding with the fringe pattern a single component of the circular-harmonic expansion derived from the target. Thus the method is invariant for rotations around the line of sight. The whole experimental setup can be constructed with simple equipment. Experimental results show the utility of the proposed method.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-03-21 | Applied optics |