代码备份：按模式划分椭圆轨迹渐变matlab

Posted 2021-01-05 wxl845235800

     x=sqrt(a^2*(1-y^2/b^2));
     r=ceil(3+2*y);
     x=ceil(x);
     if r==1
         I(m/2,m/2+x)=155+100*y;  
     elseif r==2
         I(m/2:1:m/2+1,m/2+x:1:m/2+1+x)=155+100*y;  
     elseif r==3
         I(m/2-1:1:m/2+1,m/2+x)=155+100*y;
         I(m/2,m/2-1+x:1:m/2+1+x)=155+100*y;
     elseif r==4
         I(m/2-1:1:m/2+1,m/2-1+x:1:m/2+1+x)=155+100*y;
     elseif r==5
         I(m/2-1:1:m/2+1,m/2-1+x:1:m/2+1+x)=155+100*y;
         I(m/2-2:1:m/2+2,m/2+x)=155+100*y;
         I(m/2,m/2-2+x:1:m/2+2+x)=155+100*y;
     end