An image generation method based on internal parameter correction fisheye camera

Abstract

The present invention is an image generation method based on a fisheye camera, and the original plane model used for imaging, and the step of establishing a spherical model of the field of view, according to the initial internal parameters to establish a corresponding visual field for each of the fisheye cameras. The field spherical model; the internal parameter correction step, according to the initial external parameters, respectively determine the reference mapping relationship between the field of view spherical model of each described fisheye camera and the reference spherical model; the external parameter correction step, on the reference field of view spherical Determine the same second feature points in the model as the same-name group, calculate the deviation distance between the second feature points in each same-name group, and correct the initial external parameters of each fisheye camera until the deviation distance of all the same-name groups The sum is the smallest to obtain the corrected extrinsic parameters. In the panoramic imaging step, according to the corrected intrinsic parameters and the corrected extrinsic parameters, each image collected by the fisheye lens is projected into the reference spherical model to obtain a panoramic image.

Description

technical field [0001] The invention relates to an image processing method, in particular to an image generation method for a fisheye camera based on internal parameter correction. Background technique [0002] Panoramic video is a low-cost virtual reality technology based on image stitching technology, and it is a research hotspot in the field of virtual reality and computer vision technology. Panoramic stitching technology has been widely used in many fields as a cheap and intuitive way, such as VR / AR, video shooting, video surveillance, real estate, decoration design, tourist attractions, virtual campus, street view services, etc. market demand. In order to capture larger and more complete high-definition panoramas, a panoramic camera usually consists of more than two cameras to cover a full range of viewing angles. Since the lens of a fisheye camera has the characteristics of a large field of view, the panoramic camera Most of them are composed of fisheye cameras. [...

AI Technical Summary

Problems solved by technology

[0003] To generate a panoramic image, it is necessary to splicing the collected original images through several fisheye cameras. If splicing is to be realized, the precise internal parameters and external parameters of each fisheye camera must be obtained; However, due to the limitations of industrial manufacturing technology, the relative pose relationship between cameras cannot meet the accurate alignment requirements of the theoretical value of the pose relationship between cameras. Stitching of acquired video images will produce obvious misalignment and ghosting

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