A problem with 'bwconncomp' function ....

hi all,

please i need a help this is a part of my code ,

T = maketform('affine',[cn -sn 0; 
                         sn cn 0; 
                        (size(im,2)/2-ct(2)) (size(im,1)/2-ct(1)) 1]);
im = imtransform(im,T);
BW = im>thr;
CC = bwconncomp(BW);

when i tried to run it ,i got this error : "??? Undefined function or method 'bwconncomp' for input arguments of type 'logical'."

what is the solution please?

Thanks

[Sean de Wolski]

What version of MATLAB are you using?

[mmm ssss]

Thanks for your reply .

i used this 7.7.0.471 (R2008b)

Answer 1

[Walter Roberson]

bwconncomp() was introduced in R2009a.

Answer 2

[Image Analyst]

It could be newer than your version. Check here: http://www.mathworks.com/help/techdoc/rn/rn_intro.html Either that, or you overrode the definition with your own somehow.

[mmm ssss]

Is there any way to add it to my current matlab or i have to install a newer version?

[Walter Roberson]

You would need to install a newer version, or else write the functionality based upon routines you do have access to.

[Sean de Wolski]

or find something on the FEX that does this... (hint hint)

[Image Analyst]

You can use bwlabel() instead of bwconncomp().