Expanding the Degree of View of CCTV Camera Video Image and De-blurring with Nonlinear Equation

A CCTV system reduces some number of cameras if fish-eye lenses are used.In this case, fish-eye image is distorted, so transformation to flat images is required. In the center of images, a transformed image has no distortion, but at near boundary image has plentiful distortion. This distortionis caused by occlusion of angled ray and diffraction. The linear filtering approach cannot separate noise from signal where their Fourier spectra overlap. But using a non-linear discretization method, blurred noise can bereduced. The backward solution of nonlinear wave equation for reducing blurred noise and biased expansion of equilibrium contour is introduced. It is proposed that, after applying the introduced method, the discretizationmethod is used for calculation. To analysis the experimental result, the peak signal to noise rate (PSNR) was investigated and showed about 4 PSNR value better than current method. For the covering abstract see ITRD E140665

  • Authors:
    • LEE, I J
    • HEO, B D
    • MIN, J Y
    • CHOI, Y H
    • KIM, J H
    • JEON, J W
  • Publication Date: 2007-10


  • English

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Filing Info

  • Accession Number: 01148914
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Jan 25 2010 9:01AM