Brightness equalization method and device for vehicle-mounted surround view system

Abstract

The invention discloses a brightness equalization method and apparatus for a vehicle-mounted surround view system. The method includes the steps of determining, according to magnitudes of brightness changes of historical images taken by a plurality of cameras, a current image taken by one camera as a first reference image; determining a current image captured by a camera located on the opposite side of the camera photographing the first reference image as a second reference image; determining, for an adjacent image located at the same side of the first reference image and the second reference image and taken currently by another camera, a brightness correction value of the adjacent image according to a first brightness difference and a second brightness difference of the adjacent image; and correcting the pixel brightness of the adjacent image according to the determined brightness correction value. The method of the invention can ensure the brightness consistency of a spliced image, make a fusion transition area more natural, and cause no occurrence of an obvious change of brightness to the whole spliced image, thereby facilitating the observation by a user and improving the user experience.

Description

technical field [0001] The invention relates to a brightness equalization method and device for a vehicle-mounted surround view system. Background technique [0002] With the continuous development of image technology, the car surround view system has also been widely used. Gradually, the car surround view system has become the standard configuration of the vehicle. [0003] A vehicle surround view system includes a plurality of cameras installed on the vehicle, for example, the usual number of cameras is four. Since the installation positions of the multiple cameras are different, the multiple cameras are affected by the environment differently, which will lead to differences in the brightness of the images corresponding to the multiple cameras after the surround view restoration. During the driving process of the vehicle, the difference in brightness of images corresponding to different cameras will be more obvious. If multiple images with different brightness are splice...

AI Technical Summary

Problems solved by technology

Although this solution achieves brightness balance to a certain extent, in many cases, due to factors such as interference and ambient light changes, the brightness of the image captured by a single camera will fluctuate greatly in a short period of time, which will lead to brightness balance. And the overall image after splicing has very obvious brightness changes, which affects viewing and reduces user experience

[0006] For the problem of how to achieve brightness balance for the spliced ​​images of the surround view system, no effective solution has been proposed so far

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