Research On Image Enhancement And Measurement System Of Silo Launched Deviation

In order to increase and measure silo launched deviation images, this thesis details the methods of the realization of camera calibration, image enhancement (smoke removing), image measurement of these three functions and obtains experimental results.First of all, I calibrated WK-23K9HC CCD camera, which is used in the system, with 9×7 chessboard calibration object produced by myself in the situation of studying Zhang calibration algorithm in depth, and the experimentation got a high precision camera parameters.Secondly, we can not got more satisfactory smog removing images using the more common methods in the present day. So, I improved the traditional homomorphic filtering-used high-pass filter of Butterworth high-pass filtering combined with phase angle filtering instead of the Butterworth high-pass filter of traditional homomorphic filter, and got a good experimental results. After that, we proposed a method of weighing wavelet coefficient to remove smog, and got a more satisfactory result.At last, we measured space distances in the basis of getting camera parameters, the experimental results showed that(the object distance is 1620mm): the average relative error is 0.879% when measuring the same distances in different positions and 1.066% in measuring different distances in different positions. After that, this paper analyses the measurement errors in a global scope and puts forward the methods of reducing the errors.