Open AccessDigital deformation model for fisheye image rectification
Author(s) -
Wenguang Hou,
Mingyue Ding,
Nannan Qin,
Xudong Lai
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.022252
Subject(s) - image rectification , computer science , computer vision , pinhole (optics) , artificial intelligence , coordinate system , lens (geology) , deformation (meteorology) , optics , perspective (graphical) , pixel , computation , transformation (genetics) , rectification , computer graphics (images) , physics , algorithm , power (physics) , biochemistry , chemistry , quantum mechanics , meteorology , gene
Fisheye lens can provide a wide view over 180°. It then has prominence advantages in three dimensional reconstruction and machine vision applications. However, the serious deformation in the image limits fisheye lens's usage. To overcome this obstacle, a new rectification method named DDM (Digital Deformation Model) is developed based on two dimensional perspective transformation. DDM is a type of digital grid representation of the deformation of each pixel on CCD chip which is built by interpolating the difference between the actual image coordinate and pseudo-ideal coordinate of each mark on a control panel. This method obtains the pseudo-ideal coordinate according to two dimensional perspective transformation by setting four mark's deformations on image. The main advantages are that this method does not rely on the optical principle of fisheye lens and has relatively less computation. In applications, equivalent pinhole images can be obtained after correcting fisheye lens images using DDM.