how to fix this image ?

im doing dwt watermarking but my extracted watermark not same with the original. how i fix it ?

 %host
rgbimage=imresize(imread('host.jpg'),[512 512]);
figure;imshow(rgbimage);title('original color image');
[h_LL,h_LH,h_HL,h_HH]=dwt2(rgbimage,'haar', 'd');
[h_LL2,h_LH2,h_HL2,h_HH2]=dwt2(h_LL,'haar', 'd');

 %watermarked
rgbimage=imread('watermarked.bmp');
figure;imshow(rgbimage);title('Watermarked image');
[wm_LL,wm_LH,wm_HL,wm_HH]=dwt2(rgbimage,'haar', 'd');
[wm_LL2,wm_LH2,wm_HL2,wm_HH2]=dwt2(wm_LL,'haar', 'd');

 %watermarking
 newwatermark_LL= (wm_LL2-h_LL2)/0.1;

 figure;imshow(uint8(newwatermark_LL));title('Extracted watermark');
 imwrite(uint8(newwatermark_LL),'EeweWatermark.bmp');

the result

original watermark