image watermarking using dwt

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jojototo
jojototo 2019-5-25
评论： jojototo 2019-5-31
I am using the following code to embed an image as a watermark in HL component of the host image "after performing dwt on host image" and I get this error message
""Array dimensions must match for binary array op"" could you help me to fix this problem please?
B = 'Host.png';
rgbhostImage = imread(B);
[f7,f8]= wfilters('haar','d');
[A,V,H,D]= dwt2(rgbhostImage,'haar','d');
[A2,V2,H2,D2]= dwt2(A,'haar','d');
w= imread('watermarkimage.png');
water= imresize(w, [512, 365]);
imwrite(water,'watermarkimage2.png');
watermark= imread('watermarkimage2.png');
%watermarking
wtrmrk= double(watermark);
Q= double(H2);
wtrmrkedimage= Q+0.001*wtrmrk;

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KALYAN ACHARJYA
KALYAN ACHARJYA 2019-5-25
编辑：KALYAN ACHARJYA 2019-5-25
As you didnot provided the sufficient data, but I have figure out, in which line the error occured
I have test the code with different images, the error is same
wtrmrkedimage= Q+0.001*wtrmrk;
% Plese ensure that Q and wtrmrk must have same size
How can you add the two different dimension matrices, debug the code in such that Q and wtrmrk must have same dimention (also type), checked the following way.
>> whos Q
Name Size Bytes Class Attributes
Q 128x128 131072 double
>> whos wtrmrk
Name Size Bytes Class Attributes
wtrmrk 512x365 1495040 double
>>
Check the all variable, so that dimention must agree.

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