Fast Fisheye Image Correction Method for Panoramic Parking Assist System

Abstract

The invention discloses a method for quickly correcting a fisheye image of a panoramic parking assistance system, which comprises the following steps: (1) constructing a black and white checkerboard using an adaptive Harris algorithm; (2) constructing a fisheye using the constraints of spherical perspective projection The mapping relationship between the image point and the spherical correction image point; (3) expand the spherical correction image point into a plane latitude and longitude image point according to the latitude and longitude expression; (4) store the fisheye image point and its corresponding plane latitude and longitude image point (5) According to the mapping table, the bilinear interpolation algorithm is used to correct the fisheye image points in real time. Therefore, the present invention has the characteristics of automatic calibration for the first time, can quickly correct fisheye distortion after calibration, has good versatility, avoids cumbersome steps and manual intervention, and is suitable for use in products. At the same time, it has the characteristics of fast correction speed and meets real-time requirements.

Description

technical field [0001] The invention relates to a fast correction method for fisheye lens distortion, belonging to the field of vehicle engineering applications. Background technique [0002] With the rapid development of my country's economy and the continuous increase of transportation vehicles, the resulting traffic problems have become more and more people's concerns. The number of traffic deaths in my country is about 100,000 every year, accounting for one-fifth of the world's total. In these traffic accidents, the frequency of reversing accidents is the most. There are many reasons for reversing accidents. There are dead angles in the reversing mirror, errors in the driver's visual distance, and blurred vision. The accident rate when reversing is much higher than that when the car is moving forward, especially for non-professional drivers and women. more prominent. [0003] At present, the technology of the car reversing radar system has been upgraded and its perfor...

AI Technical Summary

Problems solved by technology

[0005] The visual reversing radar based on a single rearview camera can only see the rear of the car body, but cannot see the surrounding conditions of the car body at the same time, and there is a blind spot in the viewing angle. Therefore, there is a demand for reversing with 360-degree panoramic images around the car body, that is, the panoramic parking assist system.

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