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Fisheye image correction method of vehicle panoramic display system based on spherical projection model and inverse transformation model

A spherical projection, panoramic display technology, applied in image enhancement, image data processing, instruments, etc., can solve the problem of undetectable obstacles, and achieve the effect of low processor requirements, strong real-time performance, and strong versatility

Inactive Publication Date: 2013-08-14
丹阳科美汽车部件有限公司
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Problems solved by technology

However, there are still some blind spots in the images captured by a camera, and obstacles on the side cannot be detected

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  • Fisheye image correction method of vehicle panoramic display system based on spherical projection model and inverse transformation model
  • Fisheye image correction method of vehicle panoramic display system based on spherical projection model and inverse transformation model
  • Fisheye image correction method of vehicle panoramic display system based on spherical projection model and inverse transformation model

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[0026] 1. According to the installation position of the camera and the geometric parameters of the vehicle sound, determine the range to be monitored in the world coordinate system. Take the front of the vehicle as an example, such as Figure 4 As shown, it is necessary to display the front length m meters and width n meters on the monitor in the cab, (the driving direction of the vehicle is the long side of the rectangle), according to the image resolution information displayed in the monitor, and then coordinate the coordinates between the displayed image and the real image The system is transformed, such as formula (1-1).

[0027] 2. After obtaining the coordinates P(Px, Py) in the real world, according to the position parameters of the camera installed on the vehicle, the height h of the camera, and the angle α between the optical axis of the camera and the ground, establish on the hemispherical surface of the fisheye lens and the camera coordinate system Geometric connect...

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Abstract

A fisheye lens is required to be adopted by the vehicle panoramic display system to obtain a 180-degree wide visual field, however, the visual field is deformed severely. The invention discloses a fisheye image correction method of the vehicle panoramic display system based on a spherical projection model and an inverse transformation model. The method comprises the steps as follows: (1), confirming an area A which is required to be displayed in an aerial view, and establishing a world coordinate system to position the display area; (2), obtaining a coordinate B of the area required to be displayed in a spherical longitude and latitude mapping coordinate system according to camera mounting parameters; (3), confirming the position C of the coordinate B in an original image collected by the fisheye lens according to the fisheye lens spherical projection model; (4), establishing a coordinate transformation relation from C to A through inverse projection transformation; and (5), performing interpolation arithmetic for non-integer points through a bilinear interpolation method to obtain a complete aerial view in a certain direction of the vehicle. The algorithm provided by the invention is simple in implementation and strong in universality and instantaneity.

Description

technical field [0001] The invention relates to the field of automotive electronics, and relates to a method for correcting fisheye image distortion. Background technique [0002] Now, with the continuous improvement of people's living standards, China's auto industry is also developing rapidly. According to statistics from the Traffic Management Bureau of the Ministry of Public Security, the number of motor vehicles in the country has reached about 199 million, of which about 85 million are cars. This has also led to more and more traffic accidents. According to statistics from the Traffic Management Bureau and the National Bureau of Statistics, the number of death days due to traffic accidents in my country is about 100,000 every year, and it is still increasing year by year. Among the accidents, more than half of the accidents occurred while reversing. This is closely related to the increasingly congested urban road conditions and the increasingly unprofessionalization of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 刘建国李雪松章辉罗俊蒋国民蒋卫军
Owner 丹阳科美汽车部件有限公司
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