counting the number of objects
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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
9 Comments
Jan
on 26 Dec 2011
@Pat: This is your 108th question. It is time to include the required details to make it easy to answer.
Walter Roberson
on 27 Dec 2011
http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers
Pat
on 27 Dec 2011
Chandra Kurniawan
on 27 Dec 2011
Hello, Pat.
You said that the three nails were overlapped.
But, I have seen your uploaded image,
and they aren't overlapped each other.
Pat
on 27 Dec 2011
Image Analyst
on 27 Dec 2011
What other image? You gave the non-overlapped image only, for some reason. Why did you even give that image at all (the solution is trivial)? When you are going to post the overlapped one?
Pat
on 28 Dec 2011
Image Analyst
on 28 Dec 2011
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?
Chandra Kurniawan
on 28 Dec 2011
Hahaha :D
I Agree with U
Accepted Answer
Chandra Kurniawan
on 27 Dec 2011
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??
12 Comments
Pat
on 27 Dec 2011
Pat
on 27 Dec 2011
Chandra Kurniawan
on 27 Dec 2011
So, you need to apply a little different techniques.
Just try to modify my code.
Try to apply another morphologichal operations.
If you still difficult to understand that,
Then show me your original image.
Pat
on 27 Dec 2011
Pat
on 27 Dec 2011
Chandra Kurniawan
on 27 Dec 2011
As long as the background image is same, you don't need to modify
your code.
Please upload the original version of http://imgur.com/HALTv
I'll try to find what's wrong with my code.
Pat
on 27 Dec 2011
Chandra Kurniawan
on 27 Dec 2011
Now, What can I do to help you solve your problem?
I think my code will also works on image 'http://imgur.com/HALTv'.
Coz, the missed object in this image (that contains 5 objects) is detected in previous image (that contains 3 object).
Pat
on 27 Dec 2011
Chandra Kurniawan
on 27 Dec 2011
Finally, I found the mistake.
The background image that you used are not same.
Check it carefully! The second one is lighter.
Now, just modify line
Ifinal = bwareaopen(Idiff,70);
with
Ifinal = bwareaopen(Idiff,63);
It works on both.
If in the future it doesn't work again,
Just try to setting the value like I did.
I hope this helps you.
Image Analyst
on 27 Dec 2011
No need - the patient is dead! ;-)
Pat
on 28 Dec 2011
More Answers (1)
Image Analyst
on 26 Dec 2011
0 votes
Probably . . . as long as they're not 100% overlapped and you can come up with some algorithm for separating them.
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