Invention Grant
US06744933B2 Method for image alignment under non-uniform illumination variations 有权
在不均匀照明变化下图像对准的方法

  • Patent Title: Method for image alignment under non-uniform illumination variations
  • Patent Title (中): 在不均匀照明变化下图像对准的方法
  • Application No.: US09764586
    Application Date: 2001-01-18
  • Publication No.: US06744933B2
    Publication Date: 2004-06-01
  • Inventor: Shang-Hong LaiMing Fang
  • Applicant: Shang-Hong LaiMing Fang
  • Main IPC: G06K932
  • IPC: G06K932
Method for image alignment under non-uniform illumination variations
Abstract:
A method for matching images includes the step of providing a template image and an input image. A Laplacian-of-Gaussian filtered log (LOG-log) image function is computed with respect to the template image and the input image to obtain a Laplacian-of-Gaussian filtered template image and a Laplacian-of-Gaussian filtered input image, respectively. An energy function is minimized to determine estimated geometric transformation parameters and estimated photometric parameters for the input image with respect to the template image. The energy function is formed by weighting non-linear least squared differences of data constraints corresponding to locations of both the Laplacian-of-Gaussian filtered template image and the Laplacian-of-Gaussian filtered input image. The estimated geometric transformation parameters and the estimated photometric parameters are output for further processing. The method allows for image matching under non-uniform illumination variations.
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