Finally , the problem of exponential filters for nonlinear time - delayed systems is considered . the filters designed by using the given approach can guarantee the stead - state and transient performance . by choosing suitable attenuation index , the perfect performances of filters can be attained 四、研究了一類不確定非線性時滯系統(tǒng)的指數(shù)濾波器設(shè)計問題,提出了一種設(shè)計指數(shù)濾波器的方法,使用該方法設(shè)計的濾波器可以同時保證濾波器的穩(wěn)態(tài)性能和暫態(tài)性能,通過選取濾波器的衰減指數(shù),可以使得濾波器具有良好的衰減性能,仿真結(jié)果很好地驗證了所給出的方法。
The contributions of this dissertation is listed below . aiming at existing defects of traditional beeline detection by hough transformation ( ht ) arithmetic , such as large storage space consuming , imprecise beeline detection effect and information loss of image feature pixels etc , we suggest two new beeline detection methods . ( 1 ) based on infinite symmetry exponential filter and its recursion arithmetic , new beeline detection methods can get exact direction of image edge pixels in advance , so it reduces highly the calculation quantity of the conventional ht , and improves the speed and the precision of beeline detection greatly 本論文的主要研究成果列舉如下:針對傳統(tǒng)直線檢測霍夫變換( houghtransform , ht )所存在的參數(shù)空間存儲量大,直線檢測不精確以及圖像特征點信息丟失等缺點,提出兩種新的直線段檢測算法: ( 1 )提出一種基于無限對稱指數(shù)濾波的ht直線段檢測算法,在進行邊緣檢測的同時,提前精確定位邊緣點的方向,減少了ht的運算量,提高了運算速度和檢測精度,而且整體算法便于硬件的并行執(zhí)行,使得實時處理成為可能。