×

Method and apparatus for obtaining rectilinear images using rotationally symmetric wide-angle lens

  • US 9,762,795 B2
  • Filed: 09/04/2013
  • Issued: 09/12/2017
  • Est. Priority Date: 09/04/2013
  • Status: Expired due to Fees
First Claim
Patent Images

1. An imaging system comprising:

  • an image acquisition means configured for acquiring an uncorrected image plane using a wide-angle lens rotationally symmetric about an optical axis,an image processing means configured for extracting a rectilinear image plane from the uncorrected image plane; and

    an image display means configured for displaying the rectilinear image plane on a rectangular screen,wherein,if a coordinate of an image point on the rectangular screen corresponding to an object point having a coordinate (X, Y, Z) in a world coordinate system, which has a nodal point of the wide-angle lens as an origin and a vertical line passing through the origin as an Y-axis, is given as (x″

    , y″

    ),arbitrary straight lines in the world coordinate system appear as straight, lines on the screen,wherein,the uncorrected image plane is a two dimensional array with Kmax rows and Lmax columns,a pixel coordinate of the optical axis on the uncorrected image plane is (Ko, Lo),a real projection scheme of the lens is an image height r obtained as a function of a zenith angle θ

    of a corresponding incident ray and given as r=r(θ

    ),a magnification ratio g of the camera is given as

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×