Rapid image splicing method based on wide-angle lenses

A wide-angle lens and image stitching technology, which is applied in the field of video image processing, can solve problems such as large amount of calculation and slow image stitching speed

Inactive Publication Date: 2014-08-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using undistorted images for stitching, to achieve a 360-degree panorama, considering the 40-degree field of view and one-third of the overlapping area requirements, 13 viewing angles are required, and only local registration is considered, 12 registrations and fusions are required operation, the amount of calculation is very large, so the speed of image stitching is very slow

Method used

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  • Rapid image splicing method based on wide-angle lenses
  • Rapid image splicing method based on wide-angle lenses

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Embodiment

[0062] Such as figure 1 and 2 As shown, the present embodiment discloses a fast image stitching method based on a wide-angle lens, comprising the following steps:

[0063] (1) Acquire the images collected by the wide-angle lens, perform distortion correction on the images collected by each wide-angle lens, and obtain the coordinate mapping table of the image before and after the distortion correction; the process of obtaining the coordinate mapping table of the image before and after the distortion correction in this embodiment is as follows :

[0064] (1-1) Select the radial distortion model:

[0065] x d - x c y d - y c ...

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Abstract

The invention discloses a rapid image splicing method based on wide-angle lenses. The method includes the steps that firstly, distortion correction is conducted on images acquired through the wide-angle lenses; secondly, cylindrical surface mapping is conducted on the images on which distortion correction is conducted, and a two-dimensional discrete coordinate mapping table is generated for each wide-angle lens; thirdly, the two-dimensional discrete coordinate mapping table of each wide-angle lens is loaded, and distortion correction and cylindrical surface mapping are sequentially conducted on the distortion images acquired through the wide-angle lenses according to the tables; fourthly, translation parameters between adjacent visual angle images on which cylindrical surface mapping is conducted are acquired, and the adjacent visual angle images are registered; fifthly, the registered adjacent visual angle images are fused, wherein Laplacian pyramids are established for registered adjacent visual angle image sequences respectively, linear fusion is conducted on a high-frequency pyramid image overlaying region and a low-frequency pyramid image overlaying region, and then a fused image of the adjacent visual angle images is obtained. The method has the advantages of being high in splicing speed and real-time performance.

Description

technical field [0001] The invention relates to the field of visual image processing, in particular to a fast image stitching method based on a wide-angle lens. Background technique [0002] The construction of panoramas is of great significance for effectively expanding the image field of view and obtaining effective information. It is widely used in the image processing technology of cameras, automotive electronics, mobile phones and other mobile communication equipment. At present, there are two main methods for constructing panoramic images: one is to use special cameras such as fisheye lenses, catadioptric omnidirectional imaging, and panoramic annular lenses to obtain images, and then correct imaging distortion for one-time imaging. The low rate, coupled with its high price, is only suitable for some professional occasions. Another method is to rotate a single camera to take a series of images from different perspectives or multiple cameras to take a series of images,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50G06T7/00
Inventor 冯颖邹超洋杜娟S·如凯迦苏春翌
Owner SOUTH CHINA UNIV OF TECH
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