How to remove checkerboard kind of effect in the output image

I divided my image (1280*640) into non-overlap blocks of 128*128 and applied Gabor filter on each block. When I visualise the filtered output in the form of a single image back(1280*640), I see checkerboard kind of effect in the output image. How to remove this? Following is the matlab code used for block processing-

for x=1:128:row

for yx=1:128:col 

[G1,G2,gabout1,gabout2]=gaborfilter2(im2,Sx,Sy,f,theta);

T1(x:x+127,yx:yx+127)=gabout1;

T2(x:x+127,yx:yx+127)=gabout2;

end

end

subplot(121);imshow(T1);

subplot(122);imshow(T2);