通过MATLAB实现基于冠状动脉造影图像序列的心脏及血管的三维光流运动估计

Posted 2022-03-18 fpga&matlab

1.仿真预览

 

2.部分核心代码

function [us,vs] = func_guangliu(images01,images02,areas);
 
imag01  = images01;
imag02  = images02;
%获取图像对边界进行调整
[r,c]   = size(images01);  
r_5     = r-5; 
c_5     = c-5;
z       = zeros(r,c); 
v1      = z; 
v2      = z;
%初始化
gradt  = v1;
gradx  = v1; 
grady  = v1; 
alpha2  = 625;
times   = 20;

%计算梯度
gradt(5:r_5,5:c_5) = ( imag02(6:r_5+1,6:c_5+1)-imag01(6:r_5+1,6:c_5+1) + imag02(6:r_5+1,5:c_5)   - imag01(6:r_5+1,5:c_5)   + imag02(5:r_5  ,6:c_5+1) - imag01(5:r_5  ,6:c_5+1) + imag02(5:r_5  ,5:c_5)   - imag01(5:r_5 , 5:c_5))/4;
grady(5:r_5,5:c_5) = ( imag02(6:r_5+1,6:c_5+1)-imag02(5:r_5  ,6:c_5+1) + imag02(6:r_5+1,5:c_5)   - imag02(5:r_5  ,5:c_5)   + imag01(6:r_5+1,6:c_5+1) - imag01(5:r_5  ,6:c_5+1) + imag01(6:r_5+1,5:c_5)   - imag01(5:r_5 , 5:c_5))/4;
gradx(5:r_5,5:c_5) = ( imag02(6:r_5+1,6:c_5+1)-imag02(6:r_5+1,5:c_5)   + imag02(5:r_5  ,6:c_5+1) - imag02(5:r_5  ,5:c_5)   + imag01(6:r_5+1,6:c_5+1) - imag01(6:r_5+1,5:c_5)   + imag01(5:r_5  ,6:c_5+1) - imag01(5:r_5 , 5:c_5))/4;





for i=1:times
   delta =(gradx.*v1+grady.*v2+gradt)./(alpha2+gradx.^2+grady.^2);
   v1    = v1-gradx.*delta;
   v2    = v2-grady.*delta;
end;

u              = z; 
u(5:r_5,5:c_5) = v1(5:r_5,5:c_5);
v              = z; 
v(5:r_5,5:c_5) = v2(5:r_5,5:c_5);


xskip          = round(r/areas);
[us1,vs1]  = size(u(1:xskip:r,1:xskip:c));
us             = zeros(us1,vs1); 
vs             = us;

N              = xskip^2;

for i=1:us1-1
  for j=1:vs1-1
      hk      = i*xskip-xskip+1;
      hl      = i*xskip;
      wk      = j*xskip-xskip+1;
      wl      = j*xskip;
      us(i,j) = sum(sum(u(hk:hl,wk:wl)))/N;
      vs(i,j) = sum(sum(v(hk:hl,wk:wl)))/N;
   end;
end;

C31