hello every one, i'am a newbie, i have a error ? how can i fix it ???

[Anish Walia]

Can you mention the size of w1?

[Walter Roberson]

Your posted code has reshape(w1,128,2) which would require that w1 had exactly 128*2 = 256 elements in it.

The error message is for reshape(w1,128,3) which would require that w1 had exactly 128*3 = 384 elements in it.

The 3 hints at RGB, but w1 is not RGB: it is the result of im2bw() and so is class logical.

Since it is black and white, 2 classes, that hints that the 2 in reshape(w1,128,2) might be referring to the number of expected classes, possibly.

[Join Snow]

when I changed the input image file it reported the same error, but if the default is not the original error

[Join Snow]

[Join Snow]

[Walter Roberson]

You still have not told us what size(w1) is.

[Join Snow]

clc
clear all
close all
warning off
%% audio input
ok_classical=0;   % 1 selected 0 not-selected 1 t?c là ch?n , 0 là không ch?n
ok_jazz=0;
ok_pop=0;
ok_looney=1;
 if ok_classical
[y,Fs] = audioread('classical.wav');
 end
 if ok_jazz
[y,Fs] = audioread('jazz.wav');
 end
 if ok_pop
[y,Fs] = audioread('pop.wav');
 end
 if ok_looney
[y,Fs] = audioread('Song-Gio-Huong-Ly.wav');
 end
x1=y(1:262144);
x1=reshape(x1,1,262144);

figure
plot(x1)
title('Host Audio')
xlabel(' Thoi gian (Mau)');
ylabel('Bien do');
x=reshape(x1,512,512);
Key=7;
[L1, L2]=size(x);
%% image input chuy?n ?nh màu v? ?nh xám

img  = imread('unnamed.jpg'); %Get the input image, ?nh c?n ??a vào
I = rgb2gray(img);
po=im2bw(I);
w1=im2bw(I);%Convert to grayscale image chuy?n v? ?nh thang ?? xám
figure
imshow(w1)
%% cyclic code encoding// mã hóa theo chu kì

w1=reshape(w1,128,2);
n = 3; k = 2; % A (3,2) cyclic code
code1 = encode(double(w1),n,k,'cyclic/binary');   % 2 level of encoding
code2 = encode(code1(:,1:2),n,k,'cyclic/binary');
code3 = encode(code1(:,2:3),n,k,'cyclic/binary');
part1=reshape(code2(:,1:2),128,2);
part2=reshape(code2(:,2:3),128,2);
part3=reshape(code3(:,1:2),128,2);
part4=reshape(code3(:,2:3),128,2);
a1=horzcat(part1,part2);
b1=horzcat(part3,part4);
z=vertcat(a1,b1);
w1=reshape(z,32,32);
%% Arnold Scrambling with Key

w1=arnold(w1,Key);
%% 3 level of DWT decomposition with HAAR wavelet

[L,H,V,D]=dwt2(x,'haar','sym');
[CL,CH,CV,CD]=dwt2(H,'haar','sym');
[CA1,CA2,CA3,CA4]=dwt2(CH,'haar','sym');
for i=1:16
    a(i)=4;
end
for i=1:16
    b(i)=4;
end
%% DCT of sub-band block CH->CA2

newCA2=mat2cell(CA2,a,b);
d=zeros(64,64);
nCA2=mat2cell(d,a,b);
for i=1:16
    for j=1:16
        nCA2{i,j}=dct2(newCA2{i,j});
    end
end

[Walter Roberson]

We do not have your 'unnamed.jpg' file, so we do not know how big img is.

You need to run the code and tell us what size(w1) is when the code stops running.

Or you can attach unnamed.jpg or CW16.jpg for us to be able to find out ourselves what the size is.

[Join Snow]

this is unnamed file

[Join Snow]

this is Cw16 file

[Image Analyst]

Looks like we also need the wav files to run it.

[Walter Roberson]

For the original CW16.jpg, then reshape(w1,128,2) works for me as w1 does have exactly 256 elements, as the img is 16 x 16.

However, unknown.jpg is 562 by 1679 and so has no chance of being reshaped to 128 x 2. If you were to try to resize it to 16 x 16 first, it would be unreadable.

[Join Snow]

thank you very much, I fixed it !!!