ganshee.m

SAR和SAS中应用的的干涉程序

% 粗配准，放入文件后缀为.ces.gas中 ，xrrr为配准后的信息（副图），xrr为主图


clear
clf
clc
close all
NR=3800;
NA=190;
NR1=1200;
NR2=NR-NR1;
 X=(1500/(2*40e3))*(1200:3800)+15;
 Y=1*0.2*(1:190);
file = uigetfile('*.ces');
if ~isequal(file, 0)
    fp=fopen(file,'rb');
    [x1 c]=fread(fp,[NR*2,NA],'float32'); 
    [x2 c]=fread(fp,[NR*2,NA],'float32');
    fclose(fp);
end
file=file(1:size(file,2)-4);
x3=x1';
x4=x2';

xr=complex(x3(:,1:2:NR*2-1),x3(:,2:2:NR*2));
xrr=complex(x4(:,1:2:NR*2-1),x4(:,2:2:NR*2));
xr1=zeros(NA,NR2+1);
xrr1=zeros(NA,NR2+1);
xr1=xr(:,NR1:NR);
xrr1=xrr(:,NR1:NR);
figure
imagesc(X,Y,abs(xrr1));
axis xy;

Nshift=5;
Skip=1;
ScopeX=51;
ScopeY=19;
for iy=1:ScopeY:NA
    for ix=1:ScopeX:NR2
        sr1=zeros(ScopeY,ScopeX+2*Nshift);
        if ix<Nshift
            sr2(:,Nshift+1:ScopeX+2*Nshift)=xr1(iy:iy+ScopeY-1,ix:ix+ScopeX+Nshift-1);
        else if ix+ScopeX+Nshift>NR2
                sr2(:,1:ScopeX+Nshift)=xr1(iy:iy+ScopeY-1,ix-Nshift:ix+ScopeX-1);
            else
                sr2(:,1:ScopeX+2*Nshift)=xr1(iy:iy+ScopeY-1,ix-Nshift:ix+ScopeX+Nshift-1);
            end
        end
        sr1=xrr1(iy:iy+ScopeY-1,ix:ix+ScopeX-1);
        k=1;

        for j=-Nshift:Skip:Nshift
            img1=sr1;
            img2=sr2(:,j+Nshift+1:j+ScopeX+Nshift);
            temp1(k)=abs(sum(sum((img1.*conj(img2)))));
            temp2(k)=sum(sum(abs(img1.*conj(img1))));
            temp3(k)=sum(sum(abs(img2.*conj(img2))));
            q(k)=temp1(k)/sqrt(temp2(k)*temp3(k));
            k=k+1;
        end
         dlt=find(q==max(q));
        xrrr(iy:iy+ScopeY-1,ix:ix+ScopeX-1)=sr2(:,(dlt-1)*Skip+1:(dlt-1)*Skip+ScopeX);
    end
end


 srp=xrr1.*conj(xrrr);
 fi=angle(srp);

 figure
 imagesc(X,Y,fi);
 colorbar('vert');
 axis xy;

 fp=fopen([file '.gas'],'wb');
comXrr(:,1:2:2601*2-1)=real(xrrr);
comXrr(:,2:2:2601*2)=imag(xrrr);
comXr(:,1:2:2601*2-1)=real(xrr1);
comXr(:,2:2:2601*2)=imag(xrr1);
fwrite(fp,comXrr,'float32');
fwrite(fp,comXr,'float32');
fclose(fp);