row=1280;%resolution of DOE in x direction
column=1024;%resolution of DOE in y direction
F=0.04;         %矩形光斑区域占相位图比例
w=F*row;
h=w*30/50;         %矩形长w,宽h,比值固定为50：17
for j=1:row
    for k=1:column
      if j>row/2-w/2&j<row/2+w/2&k>column/2-h/2&k<column/2+h/2
          Photo(k,j)=255;
      else
           Photo(k,j)=0;
      end
    end
end
A=Photo;%target pattern
imwrite(A, 'rectangle.tif');
goals=double(A);%target pattern