Question

This is a section of code from my program

%read in the message image and reshape it into a vector
file_name='innocence.bmp';
message=double(imread(file_name));
Mm=size(message,1);   %height 
Nm=size(message,2);   %Width 
message_vector=round(reshape(message,Mm*Nm,1)./2);

I am getting this error

??? Error using ==> reshape
TO RESHAPE the number of elements must not change.
Error in ==>dwt at 31  message_vector=round(reshape(message,Mm*Nm,1)./2);

What am I doing wrong?

Answer 1

If you just want to reshape your [Mm x Nm] matrix to a [1 x Mm*Nm] vector you can use:

message_vector=round(message(:)/2);