setting the information of an image into a vector, avoiding masked zones

[Damien Sirjacobs]

Hi

I am searching for the most fast and memory efficient way to realise
the following operation with matlab (avoiding as far loops of for and
if):


creating a vector of data composed by appending the columns of a
large
matrix IMAGE, but excluding the points defined by a second matrix
MASK
of the same size as IMAGE.


Thank you for suggestions!!


D. S.

[david bateman]

Post by Damien Sirjacobs
Hi
I am searching for the most fast and memory efficient way to realise
the following operation with matlab (avoiding as far loops of for and
creating a vector of data composed by appending the columns of a
large
matrix IMAGE, but excluding the points defined by a second matrix
MASK
of the same size as IMAGE.
Thank you for suggestions!!
D. S.

Consider

image = reshape(1:16,4,4)
mask = [zeros(4,1),ones(4,1),zeros(4,2)]
image (mask == 0)

D.