Array of Matrices.?

Hi, I'm a complete novice to MATLAB. I'm reading a few images and want to save their matrix value in an array. Every image is 576x576px and theres about 100 of them.

Also, how do you multiply a uint8 matrix with a double matrix without losing image quality?

[Jan]

Please post, what you have done so far. It is much more efficient to modify your code, than to post completely new code, which would increase your confusion again.

[Aditya]

Yes...

Hitherto I have done...

A=imread(filename)

(A is now a uint8 matrix

A=double(A) because the dct2 function gives me a matrix array I cant multiple with A. (HELP ME WITH THIS PLEASE)

B=dct2(A)

M=B*A*B'

now I have to store M in an array. There are about 158 values of M. Also, they have to be in 2 different arrays one of sice 64 and the other of the remaining size.

Then I have to run a loop which gives me the max value of M-N for every corresponding value in the matrices and obtain the minimum.

How do I make the array. Also, can is there a way to multiply the A and B matrices without casting??

Answer 1

[the cyclist]

Regarding your first question: MATLAB supports N-d arrays, so you can store a variable as 576x576x100.

[Aditya]

Ohh I see. But how will I exactly go coding that? I have to run a minimum value for loop through it, so how do I point to each value?

Im sorry to ask such a basic question, the thing is...I need to learn MATLAB in 2 days in order to carry out this research implementation I'm working on.

Answer 2

[Walter Roberson]

Please see

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[Walter Roberson]

instead of using double(A), I suggest you use im2double(A)