ImageAnalyst <firstname.lastname@example.org> wrote in message <email@example.com>... > Joseph : > Yes. You can look at the Euler Number of the object. This is > returned from regionprops() in the image processing toolbox. > Basically the process is this (for almost all image processing > applications: > 1. threshold image to binarize it > 2. connected components labeling, using bwlabel() or bwconncomp() > 3. regionprops(), to make the measurements > > Here is the definition of Euler Number: > 'EulerNumber' — Scalar that specifies the number of objects in the > region minus the number of holes in those objects. This property is > supported only for 2-D input label matrices. regionprops uses 8- > connectivity to compute the EulerNumber measurement. > > My demo at http://www.mathworks.com/matlabcentral/fileexchange/25157 > will help you to do the measurement.