1 clear all; 2 close all; 3 clc; 4 n=40; 5 6 point=load('point.mat'); 7 current_point=point.point; 8 9 plot(current_point(:,1),current_point(:,2),'r'); 10 11 %系统方程:x(k+1)=fi*x(k)+gm*w(k) 12 %观测方程:z(k)=h*x(k)+v(k) 13 14 x=current_point(:,1); 15 y=current_point(:,2); 16 17 fi=1; 18 h=1; 19 gm=5; 20 21 w=randn(1,n); 22 v=randn(1,n); 23 24 xy_x(1)=x(1); 25 xy_y(1)=y(1); 26 27 p(1)=0; 28 z_x(1)=x(1)+w(1); 29 z_y(1)=y(1)+w(1); 30 R=(std(v)).^2; 31 Q=(std(w)).^2; 32 k(1)=fi*p(1)*h'*inv(h*p(1)*h'+R); 33 pp(1)=fi*p(1)*fi'+gm*Q*gm'; 34 35 for i=2:n 36 xy_x(i)=fi*xy_x(i-1)+k(i-1)*(z_x(i-1)-xy_x(i-1)); 37 xy_y(i)=fi*xy_y(i-1)+k(i-1)*(z_y(i-1)-xy_y(i-1)); 38 39 k(i)=pp(i-1)*h'*inv((h*pp(i-1)*h'+R)); 40 pp(i)=fi*p(i-1)*fi'+gm*Q*gm'; 41 p(i)=pp(i-1)-k(i)*h*p(i-1); 42 43 z_x(i)=x(i)+w(i); 44 z_y(i)=y(i)+w(i); 45 end 46 47 hold on; 48 plot(xy_x,xy_y); 49 grid on;
point.mat是从视频中提取的目标坐标值,一个四十个坐标。
图片福利: