一种可模拟鱼眼畸变的高清视频信号源设计

Design of High-Definition Video Generator with Fisheye Distortion Emulation

鱼眼摄像头的视频处理系统在汽车辅助驾驶中得到了越来越广泛的应用。在研发和生产中,人们对视频信号源的需求日益增加,而市面上缺少针对鱼眼摄像头系统的视频信号源。因此,以亚德诺半导体(Analog Devices Inc.,ADI)的Blackfin系列数字信号处理(Digital Signal Processing,DSP)芯片BF561为核心,设计了一种模拟高清摄像头(Analog High Definition,AHD)信号输出的高清视频信号源。该信号源可根据用户的设置选择不同的测试图像输出,并选择是否开启鱼眼畸变模拟。鉴于此,介绍鱼眼相机的成像模型,提出在现有图像上进行鱼眼畸变模拟的方法,详细阐述系统的硬件设计和软件设计,并给出测试结果。结果表明:该视频信号源能够输出多种分辨率的测试图像,有利于模拟鱼眼摄像头的畸变,进一步提高了开发测试的便利性。

The video processing system of fisheye camera has been more and more widely used in vehicle assisted driving.It leads the demand of video signal generator in the development and production is increased,the market lack of video signal generator for fisheye camera systems.In this paper,the ADI’s Blackfin DSP chip BF561 as the core processor,a high-definition video generator with AHD signal output is designed,which can select different test pattern image output according to the user’s settings,and select whether to turn on fisheye distortion emulation.This paper introduces the imaging model of the fisheye camera,proposes a method for emulating fisheye distortion on the existing image,elaborates the hardware and software design of the system,and gives the test results.The results show that the video signal generator can output a variety of resolution test pattern images,which can be emulated will for distortion of the fisheye camera,and greatly improve the convenience of development and testing.