how to detect white spot in an image????

i am new one with matlab. i want do this programm detecting empty medicine strip...

Answer 1

[Image Analyst]

[labeledImage, numSpots] = bwlabel(binaryImage);

[yogesh nandurkar]

thanks for your help.... for detecting object i used regionprops(BW). and got the result...

stats = regionprops('table',bw,'Centroid',...
    'MajorAxisLength','MinorAxisLength')

centers = stats.Centroid;
diameters = mean([stats.MajorAxisLength stats.MinorAxisLength],2);
radii = diameters/2;

[Image Analyst]

Rather than averaging the major and minor axis lengths, you might want to consider asking for 'EquivDiameter' which is the diameter of a circle with the same number of pixels as your blob.

If I've solved, it then can you please "Accept this Answer"?