We derive a new class of photometric invariants that can be used for a variety of vision tasks including lighting invariant material segmentation, change detection and tracking, as well as material invariant shape recognition. The key idea is the formulation of a scene radiance model for the class of "separable" BRDFs, that can be decomposed into material related terms and object shape and lighting related terms. All the proposed invariants are simple rational functions of the appearance parameters (say, material or shape and lighting). The invariants in this class differ from one another in the number and type of image measurements they require. Most of the invariants in this class need changes in illumination or object position between image acquisitions. The invariants can handle large changes in lighting which pose problems for most existing vision algorithms. We demonstrate the power of these invariants using scenes with complex shapes, materials, textures, shadows and specularities.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A class of photometric invariants: separating material from shape and illumination


    Contributors:
    Narasimhan, (author) / Visvanathan Ramesh, (author) / Nayar, (author)


    Publication date :

    2003-01-01


    Size :

    638261 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    A Class of Photometric Invariants: Separating Material from Shape and Illumination

    Narasimhan, S. / Ramesh, V. / Nayar, S. et al. | British Library Conference Proceedings | 2003


    Color Subspaces as Photometric Invariants

    Zickler, T. / Mallick, S. P. / Kriegman, D. J. et al. | British Library Online Contents | 2008


    Color edge detection by photometric quasi-invariants

    van de Weijer, / Gevers, / Geusebroek, | IEEE | 2003


    Using Photometric Invariants for 3D Object Recognition

    Nagao, K. / Grimson, W. E. L. | British Library Online Contents | 1998


    Color Edge Detection by Photometric Quasi-Invariants

    van de Weijer, J. / Gevers, T. / Geusebrock, J. et al. | British Library Conference Proceedings | 2003