finding distance of coordinates points to centre

i have a binary image with 12 objects in it, i wanna find the distance of centre of each object to the boundary points of that object, does any one know to how find it? i could find this code, but it seems to not work:

http://uk.mathworks.com/matlabcentral/answers/72382-coordinates-of-the-farthest-point-from-centroid

[Walter Roberson]

Which version of that code did you use? Did you put in the correction shown in the Answer to that Question?

[Abo]

the mentioned method seems to be for one object in a image, how can I use it for 12 object in my image?

Answer 1

[Image Analyst]

There is a function for that. It's called bwdist().

distanceTransform = bwdist(binaryImage);