IMAGE Processing(matrix comparision)

Hi All,

if i have two matrix to be compared, and i dont want perticular element to be compaered, how do i do that in matlab..??

for Ex

A=[1 8 8
   7 6 *
   9 9 9]
B=[3 5 6
   5 6 5
   9 0 9]

as u can see a '*' symbol in matrix a, so while comparing A and B i dont want to compare the element at the '*' postion in A, with the corrosponding B's element..

please help me in this regard,

Thank You in advance.

[EDITED: Code formatted, Jan Simon]

[Chandra Kurniawan]

Actually, you cannot put '*' in numeric array.

You can use other array to define the position of '*'

Eq :

pos = [2 3];

[Muthuraj V]

i think u dint get my question,,,,

i have put a '*' to indicate that it can be any value....

when checking for equality between two Matrix, i don't want to check the equality of a particular element in the matrix,

say for example i dont want to compare the element in the index or position(0,2) with other matrix, so how do i do this..??

Answer 1

[Jan]

What exactly does "compare" mean? It would be easier to create an answer, if this detail need not to be guessed.

Perhaps:

mask = logical([1, 1, 1; 1, 1, 0; 1, 1, 1]);
isequal(A(mask), B(mask))

[Muthuraj V]

i think u dint get my question,,,, when checking for equality between two arrays i don't want to check the equality of a particular element in the matrix, say for example i dont want to compare the element in the index or position(0,2) withe other matrix, so how do i do this..??

[Image Analyst]

I thought Jan's answer sounds exactly like what you want. It compares all elements for equality except the (0,2) elements which it ignores. Isn't that exactly what you want?

[Muthuraj V]

yes thats what i want, but i dint get exactly how this code works, can u please explain me..

mask = logical([1, 1, 1;

1, 1, 0;

1, 1, 1]);

isequal(A(mask), B(mask))

[Walter Roberson]

http://www.mathworks.com/help/techdoc/math/f1-85462.html#bq7egb6-1

[Muthuraj V]

Thanks a Lot...