Method and device for correcting fisheye image

Abstract

The invention discloses a method of correcting a fisheye image. The method comprises steps: a fisheye image is acquired through a fisheye lens preset in a panoramic camera; the optical imaging center and the spherical radius of the fisheye image are determined; according to the optical imaging center and the spherical radius, a double-longitude spherical model is built; according to the double-longitude spherical model, the fisheye image is corrected to obtain a correction image; and the correction image is restored through a preset target restoration mathematical model, a target correction image is obtained. The invention also discloses a device for correcting the fisheye image. The fisheye image correction effects can be improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for correcting a fisheye image. Background technique [0002] The fisheye lens is a special kind of lens in the super wide-angle lens, which can cover the scenery within 180 degrees or even a larger range. However, the images captured by the fisheye lens generally have a large degree of barrel or pincushion distortion, and the fisheye images need to be corrected to be further stitched into a panoramic image. [0003] At present, in the existing fisheye image correction method, although a certain correction effect is obtained, in the process of correction using this method, the density of the squares arranged at equal intervals horizontally and vertically will change after correction. For the position of the center of the fisheye image, the denser the grid obtained after correction, the closer the position to the center of the fisheye image, the spars...

AI Technical Summary

Problems solved by technology

However, the images captured by the fisheye lens generally have a large degree of barrel or pincushion distortion, and the fisheye images need to be corrected to be further spliced ​​into panoramic images.

[0003] At present, in the existing fisheye image correction method, although a certain correction effect is obtained, in the process of correction using this method, the density of the squares arranged at equal intervals horizontally and vertically will change after correction. The position of the center of the fisheye image, the denser the grid obtained after correction, the closer the position to the center of the fisheye image, the sparser the grid obtained after correction

As a result, the linear density of the corrected image is far away from the objective world, that is, the corrected fisheye image is not realistic enough, and the correction effect is not good.

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