Shadow Resistant Direct Image Registration

  • Daniel Pizarro
  • Adrien Bartoli
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4522)

Abstract

Direct image registration methods usually treat shadows as outliers. We propose a method which registers images in a 1D shadow invariant space. Shadow invariant image formation is possible by projecting color images, expressed in a log-chromaticity space, onto an ‘intrinsic line’. The slope of the line is a camera dependent parameter, usually obtained in a prior calibration step. In this paper, calibration is avoided by jointly determining the ‘invariant slope’ with the registration parameters. The method deals with images taken by different cameras by using a different slope for each image and compensating for photometric variations. Prior information about the camera is, thus, not required. The method is assessed on synthetic and real data.

Keywords

Direct Registration Shadow Invariant Photometric Camera Calibration 

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Copyright information

© Springer Berlin Heidelberg 2007

Authors and Affiliations

  • Daniel Pizarro
    • 1
  • Adrien Bartoli
    • 2
  1. 1.Department of Electronics, University of Alcala, Esc. Politecnica, 28871 Alcala de HenaresSpain
  2. 2.LASMEA, Blaise Pascal University, 24 avenue des Landais, 63411 AubiereFrance

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