Fisheye image correction method of vehicle panoramic display system based on unit square

Abstract

The invention relates to a fisheye image correction method of a vehicle panoramic display system based on a unit square. The fisheye image correction method comprises the following steps: selecting a rectangular region A needing to be corrected in a certain direction of a vehicle according to panoramic display requirements; determining and correcting the size of the unit square needing to be used according to the size of the region A; putting a unit square combined frame into the region A; carrying out corner extraction on a fisheye image comprising n integrated unit squares by using a Harris corner detector; encoding each corner and recording the coordinate of each corner in the fisheye image; correcting each unit square in the region A of the image by using four corner coordinates of each unit square in the fisheye image and geometric constraints of the squares; and carrying out interpolation operation on non-integral points in a correction process by using a bilinear interpolation method to finally obtain a corrected image of the integral region A in the certain direction of the vehicle. The method is simple to realize, has low requirements on a processor, and has very strong commonality and instantaneity.

Description

technical field [0001] The invention relates to the field of vehicle engineering applications, in particular to a fisheye image correction method based on a unit square for a vehicle panoramic display system. Background technique [0002] Automobile has become an indispensable means of transportation in modern society, it has changed people's way of life, promoted the development of social economy and the progress of human culture. In recent years, the pace of cars entering households has gradually accelerated. At present, the number of civilian cars in China has exceeded 100 million, surpassing Germany and second only to the United States. At the same time, China has a large population, and the population density of major cities is very high. The conflicts between cars and cars, and people and cars are also particularly acute. There are frequent accidents on the road. The number of traffic accidents is much higher than that of developed countries and other developing countr...

AI Technical Summary

Problems solved by technology

Since the reversing camera installed at the rear of the car can only detect the area behind the car, and the visual blind spots on both sides and front of the car undoubtedly increase the probability of traffic accidents, and now the images captured by a single camera are distorted to a certain extent, which is not suitable for driving. visual habits

In a narrow and congested parking lot, especially when there are cars on the left and right sides, if only the images input from the rear camera are used to assist driving, there are still many blind spots in the driver's field of vision when parking, which is very easy lead to safety accidents

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