Panoramic image stitching method for vehicle-mounted environment

Abstract

The invention discloses a panoramic image stitching method for a vehicle-mounted environment. On the basis of frequently-used panoramic image stitching, an effective panoramic stitching scheme is provided for panoramic stitching of a vehicle-mounted system. An improved weighted fusion imaging model is used for correcting a fisheye image, a down-looking projection stage uses a direct linear transformation method as a basis, and translation and rotation parameters are added to correct measurement errors in an experiment process; an image registration stage uses an image registration method based on an edge template, arranged white form line four corners serve as a registration template, template edge points need to be selected during the registration process, an edge template descriptor is generated, and thus, the registration is more accurate; an image fusion stage uses a weighted average method as a basis, a trigonometric function term is added, and pixel differences in an overlapped area between adjacent images are reduced. The registration accuracy and the fusion effects are improved, the process is simple, the method is applied to the vehicle-mounted environment, and the application prospect is good.

Description

Technical field [0001] The present invention belongs to the technical field of digital image processing, and more specifically, relates to a panoramic image stitching method for a vehicle-mounted environment. Background technique [0002] Image Stitching is a technology that uses real images to form a panoramic space. It stitches multiple images into a large-scale image or 360-degree panorama. Image splicing technology involves computer vision, computer graphics, digital image processing and other technologies. Among them, the basic steps of panoramic image stitching mainly include the following aspects: image distortion correction, image projection transformation, image registration, panoramic image stitching (fusion). [0003] In the vehicle-mounted environment, a fisheye lens is used, which has serious barrel distortion. In the stitching process, the distortion of the image needs to be removed, that is, the image distortion correction is performed. Currently, the commonly used...

AI Technical Summary

Problems solved by technology

Among them, the longitude and latitude correction method is simple to operate, but the correction accuracy is not high. The Zhang Zhengyou calibration method is more complicated to operate, but the correction accuracy is the highest. The imaging model correction method is in between.

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