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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 17 — Jun. 10, 2014
  • pp: 3764–3772

Nonrigid registration with free-form deformation model of multilevel uniform cubic B-splines: application to image registration and distortion correction of spectral image cubes

Timo Eckhard, Jia Eckhard, Eva M. Valero, and Juan Luis Nieves  »View Author Affiliations

Applied Optics, Vol. 53, Issue 17, pp. 3764-3772 (2014)

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In spectral imaging, spatial and spectral information of an image scene are combined. There exist several technologies that allow the acquisition of this kind of data. Depending on the optical components used in the spectral imaging systems, misalignment between image channels can occur. Further, the projection of some systems deviates from that of a perfect optical lens system enough that a distortion of scene content in the images becomes apparent to the observer. Correcting distortion and misalignment can be complicated for spectral image data if they are different at each image channel. In this work, we propose an image registration and distortion correction scheme for spectral image cubes that is based on a free-form deformation model of uniform cubic B-splines with multilevel grid refinement. This scheme is adaptive with respect to image size, degree of misalignment, and degree of distortion, and in that sense is superior to previous approaches. We support our proposed scheme with empirical data from a Bragg-grating-based hyperspectral imager, for which a registration accuracy of approximately one pixel was achieved.

© 2014 Optical Society of America

OCIS Codes
(100.2980) Image processing : Image enhancement
(150.1488) Machine vision : Calibration
(110.4234) Imaging systems : Multispectral and hyperspectral imaging

ToC Category:
Machine Vision

Original Manuscript: January 31, 2014
Manuscript Accepted: April 25, 2014
Published: June 10, 2014

Timo Eckhard, Jia Eckhard, Eva M. Valero, and Juan Luis Nieves, "Nonrigid registration with free-form deformation model of multilevel uniform cubic B-splines: application to image registration and distortion correction of spectral image cubes," Appl. Opt. 53, 3764-3772 (2014)

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