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counting the number of objects

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Pat
Pat 2011-12-26
I have an brain image and there are three overlapped objects.The overlapped object is nails ..can i count these overlapped objects.in medical images
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Image Analyst
Image Analyst 2011-12-28
If I had three nails embedded in my brain, most likely I would be dead, and a physician could instantly see how many nails had killed me, and wouldn't need an image processing program to count them. So why did you ask about overlapping nails when that's not what you have?

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Chandra Kurniawan
Chandra Kurniawan 2011-12-27
Hello, Pat.
It is possible to count the nails.
You just need to perform some morphologichal operations, such as
erosion, area open, etc.
Then, in the next step you need to count the objects. You can use regionsprops command.
Here my demo :
Irgb = imread('n7vGa.jpg');
Igray = rgb2gray(Irgb);
Ibw = im2bw(Igray, 0.9);
se = strel('square',2);
Imorph = imerode(Ibw,se);
Iarea = bwareaopen(Imorph,130);
Idiff = Imorph - Iarea;
Ifinal = bwareaopen(Idiff,70);
stat = regionprops(Ifinal,'BoundingBox');
str = sprintf('number of detected nails : %d', length(stat));
imshow(Irgb); title(str); hold on;
for cnt = 1 : length(stat)
bb = stat(cnt).BoundingBox;
rectangle('position',bb,'edgecolor',rand(1,3));
end
And the result :
Is that you meant??
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Image Analyst
Image Analyst 2011-12-27
No need - the patient is dead! ;-)

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Image Analyst
Image Analyst 2011-12-26
Probably . . . as long as they're not 100% overlapped and you can come up with some algorithm for separating them.

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