Research Of Extracting And Tracking Of The Runway In Infrared Image-Guided Technology Used In Terminal-sensitive Missile

As image-guidance technology has a great future in airmanship, it applied in terminal-sensitive missile becomes a new research. To the terminal-sensitive missile, which is used to attack the runway, image-gudidance has great superiority to other guided technology. The main work of this dissertation is to guide the missile to attack the runway through digital image processing technology. In other words, just to get the width of the runway in image, to get the linear parameters of the runway, to get the rotate velocity of the missile. After finishing the work that was mentioned, we can determine the time when the engine of terminal-sensitive missile to modify the terminal orbit is ignited.In the process of research, the problems we encounter and the methods to tackle it are listed:1) The images obtained by infrared camera are severely distorted, with the straight runway curved in image. This dissertation constructs a mathematic model to restore it. From the image after restored, we can prove that the model is correct.2) This dissertation combines the method of target tracking and the method of Hough transformation, which is often used to extract the parameters of line to track the runway in a sequence of images. The combination remains the merits of Hough transformation, but reduces the quantity of calculation greatly, and makes the algorithm achieve the aim to track the runway in real-time.3) How to eliminate the infection of vibration of missile with the method of data processing is the work we must do to insure the precision of the missile. This dissertation adopts a simple but very clever method instead of the fussy calculation. The result proves this method eliminate the infection of vibration of missile mainly.4) This dissertation makes programme running on computer platform with C++ language. As the algorithm must be achieved in DSP platform, this dissertation optimizes the algorithm and makes the program runs on the hardware platform of DSPs, and check up it. The result of experiment proves the program can run on DSP platform correctly.5) The optical measurement has superiority to traditional method, which uses transducers in measuring the vibration of solar power wings. This dissertation designs a scheme with optical measurement, and introduces the method of bundle adjustment to modify the parameters of camera, which arc probably changed when it works in space to improve the precision of the optical measurement.