Abstract
Object localisation and recognition are fundamental problems in computer vision. The goal is to enable a mobile robot to locate general, non-polyhedral objects in complex settings. This requires considerable robustness and reliability, and so low level invariants are used as a robust starting point. In particular, a set of quantities is developed that are both geometrically and photometrically invariant. They are arranged as the components of a description vector, which are matched to locate model instances.
The paper analyses the variations of the invariant quantities. These arise in practice due to image noise and spatial quantisation: the case of image noise is treated here, quantisation being the subject of ongoing work. The noise models obtained show good agreement with experimental results. A probability model for the variation of the description vectors is derived and used to define a saliency measure in the image. Combining this with a Non-Uniform selection strategy in a modified RANSAC (NU-RANSAC) scheme leads to a dramatic improvement in the probability of correctly matching points, which is the basis of localising the desired object.
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References
Andrew Blake, Michael Isard, and David Reynard. Learning to track the visual motion of contours. Artificial Intelligence, 8:101–133, 1995.
M.A. Fischler and R.C. Bolles. Random sample concensus: A paradigm for model fitting with applications to image analysis and automated cartography. Comm. ACM, 24(6):381–395, 1981.
W.E.L. Grimson. From Images to Surfaces: A Computational Study of the Human Early Visual System. MIT Press, Cambridge MA, 1981.
Glenn E. Healey and Raghava Kondepudy. Radiometric CCD camera calibration and noise estimation. IEEE Transactions on Pattern Analysis and Machine Intelligence, 16(3):267–276, 1994.
Mark Jenkinson. Object localisation using saliency. Technical Report OUEL 97, University of Oxford, 1997.
Peter Kovesi. Invariant Measures of Image Features from Phase Information. PhD thesis, University of Western Australia, 1996.
J.S.A. Merron and J.M. Brady. Isotropic gradient estimation. In Conference on Computer Vision and Pattern Recognition, pages 652–659, San Francisco, June 1996. IEEE Computer Society, IEEE Computer Society Press.
Cordelia Schmid and Roger Mohr. Object recognition using local characterization and semi-local constraints. IEEE Transactions on Pattern Analysis and Machine Intelligence, 19(5):530–534, 1997.
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© 1997 Springer-Verlag Berlin Heidelberg
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Jenkinson, M., Brady, M. (1997). Feature saliency from noise variations in invariants. In: Chin, R., Pong, TC. (eds) Computer Vision — ACCV'98. ACCV 1998. Lecture Notes in Computer Science, vol 1352. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-63931-4_196
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DOI: https://doi.org/10.1007/3-540-63931-4_196
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