We describe an efficient algorithm for recognizing 3D objects by combining photometric, and geometric invariants. A photometric property is derived, that is invariant to the changes of illumination and to relative object motion with respect to the camera and/or the lighting source in 3D space. We argue that conventional color constancy algorithms can not be used in the recognition of 3D objects. Further we show recognition does not require a full constancy of colors, rather, it only needs something that remains unchanged under the varying light conditions and poses of the objects. Combining the derived color invariant and the spatial constraints on the object surfaces, we identify corresponding positions in the model and the data space coordinates, using centroid invariance of corresponding groups of feature positions. Tests are given to show the stability and efficiency of our approach to 3D object recognition.<>


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    Title :

    Recognizing 3D objects using photometric invariant


    Contributors:
    Nagao, K. (author)


    Publication date :

    1995-01-01


    Size :

    995662 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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