What is norm 2 function ?

Sir..can i use norm 2 function for image matching based on the image features ??

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/matlab/ref/norm.html

n = norm(X) returns the 2-norm of input X and is equivalent to norm(X,2). If X is a vector, this is equal to the Euclidean distance. If X is a matrix, this is equal to the largest singular value of X.

[ANJU]

thank you sir..

Answer 2

[Youssef Khmou]

norm(X,2) returns the largest singular value, in your case , i propose that you test with the three existing norms : Forbenius, Inf, 2 and the norm 1 which is the largest column sum.

[ANJU]

Thank you sir...

[Walter Roberson]

norm(X,2) would only return largest singular value if X was a matrix. If X is a vector it returns the Euclidean length of the vector.

[Youssef Khmou]

thnks for the detail.