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Radial Bright Channel Prior for Single Image Vignetting Correction

  • Hojin Cho
  • Hyunjoon Lee
  • Seungyong Lee
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8690)

Abstract

This paper presents a novel prior, radial bright channel (RBC) prior, for single image vignetting correction. The RBC prior is derived from a statistical property of vignetting-free images: for the pixels sharing the same radius in polar coordinates of an image, at least one pixel has a high intensity value at some color channel. Exploiting the prior, we can effectively estimate and correct the vignetting effect of a given image. We represent the vignetting effect as an 1D function of the distance from the optical center, and estimate the function using the RBC prior. As it works completely in 1D, our method provides high efficiency in terms of computation and storage costs. Experimental results demonstrate that our method runs an order of magnitude faster than previous work, while producing higher quality results of vignetting correction.

Keywords

radial bright channel prior vignetting correction 
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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  • Hojin Cho
    • 1
  • Hyunjoon Lee
    • 1
  • Seungyong Lee
    • 1
  1. 1.Pohang University of Science and Technology (POSTECH)Korea

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