matlab纠错---数据类型转化

clear;clc;
Image1 = imread('e:\images\zstree.jpg');
gray1=single(rgb2gray(Image1));
Image2 = imread('e:\images\zstree1.jpg');
gray2=single(rgb2gray(Image2));
center(1:6,1:2)=[22,22;68,22;112,22;22,138;68,138;112,138];

for i=11%:34
for j=11%:34
firstline=abs( gray2(i,j)-gray1(19,19) )+abs( gray2(i,j+1)-gray1(19,20))+abs( gray2(i,j+2)-gray1(19,21))+abs( gray2(i,j+3)-gray1(19,22))+abs( gray2(i,j+4)-gray1(19,23))+abs( gray2(i,j+5)-gray1(19,24))+abs( gray2(i,j+6)-gray1(19,25));
secondline=abs( gray2(i+1,j)-gray1(19+1,19))+abs( gray2(i+1,j+1)-gray1(19+1,20))+abs( gray2(i,j+2)-gray1(19+1,21))+abs( gray2(i,j+3)-gray1(19+1,22))+abs( gray2(i,j+4)-gray1(19+1,23))+abs( gray2(i,j+5)-gray1(19+1,24))+abs( gray2(i,j+6)-gray1(19+1,25));
thirdline=abs( gray2(i+2,j)-gray1(19+2,19))+abs( gray2(i+2,j+1)-gray1(19+2,20))+abs( gray2(i,j+2)-gray1(19+2,21))+abs( gray2(i,j+3)-gray1(19+2,22))+abs( gray2(i,j+4)-gray1(19+2,23))+abs( gray2(i,j+5)-gray1(19+2,24))+abs( gray2(i,j+6)-gray1(19+2,25));
forthline=abs( gray2(i+3,j)-gray1(19+3,19))+abs( gray2(i+3,j+1)-gray1(19+3,20))+abs( gray2(i,j+2)-gray1(19+3,21))+abs( gray2(i,j+3)-gray1(19+3,22))+abs( gray2(i,j+4)-gray1(19+3,23))+abs( gray2(i,j+5)-gray1(19+3,24))+abs( gray2(i,j+6)-gray1(19+3,25));
fifthline=abs( gray2(i+4,j)-gray1(19+4,19))+abs( gray2(i+4,j+1)-gray1(19+4,20))+abs( gray2(i,j+2)-gray1(19+4,21))+abs( gray2(i,j+3)-gray1(19+4,22))+abs( gray2(i,j+4)-gray1(19+4,23))+abs( gray2(i,j+5)-gray1(19+4,24))+abs( gray2(i,j+6)-gray1(19+4,25));
sixthline=abs( gray2(i+5,j)-gray1(19+5,19))+abs( gray2(i+5,j+1)-gray1(19+5,20))+abs( gray2(i,j+2)-gray1(19+5,21))+abs( gray2(i,j+3)-gray1(19+5,22))+abs( gray2(i,j+4)-gray1(19+5,23))+abs( gray2(i,j+5)-gray1(19+5,24))+abs( gray2(i,j+6)-gray1(19+5,25));
seventhline=abs( gray2(i+6,j)-gray1(19+6,19))+abs( gray2(i+6,j+1)-gray1(19+6,20))+abs( gray2(i,j+2)-gray1(19+6,21))+abs( gray2(i,j+3)-gray1(19+6,22))+abs( gray2(i,j+4)-gray1(19+6,23))+abs( gray2(i,j+5)-gray1(19+6,24))+abs( gray2(i,j+6)-gray1(19+6,25));
block1=firstline+secondline+thirdline+fifthline+fifthline+sixthline+seventhline
TK1=block1
end
end