Counting objects in an image

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subrajeet
subrajeet 2013-1-7
评论： Beenish Ishtiaq 2021-8-5
Dear Researchers, I have a problem of counting objects in an image. Suppose I have the below image (below link)
http://s20.postimage.org/bah41jkml/test1.jpg
which i got after segmentation.
how can I count the small circles in the middle of the image. Kindly suggest
Subrajeet

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采纳的回答

Image Analyst
Image Analyst 2013-1-7
编辑：Image Analyst 2013-1-7
  1. Binarize the image so that it's logical. binaryImage = grayImage > 128
  2. Call binaryImage = imclearborder(binaryImage) to get rid of the single line around the perimeter.
  3. Invert the image: binaryImage = ~binaryImage, so now black circles are white
  4. Call binaryImage = imclearborder(binaryImage) to get rid of the large (now white) background
  5. Call bwlabel: [labeledImage, numberOfCircles] = bwlabel(binaryImage). This gives you the count.
  6. Call measurements = regionprops(labeledImage) if you want other measurements
See my Image Segmentation Tutorial in my File Exchange if you want an example.
  2 个评论
subrajeet
subrajeet 2013-1-7
@Image Analyst from core of my heart I want to thankyou. Really I could not do it from yesterday. But one one thing can you tell me using which image processing technique this was achieved.
Thanks a lot again.
Image Analyst
Image Analyst 2013-1-7
编辑：Image Analyst 2013-1-7
It's just basic, elementary image segmentation via intensity thresholding. Nothing fancy at all. See updated instructions above.

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更多回答（3 个）

Thomas
Thomas 2013-1-7
编辑：John Kelly 2017-11-8
You could use techniques shown in many MATLAB image processing demos.
  1 个评论
subrajeet
subrajeet 2013-1-7
Thomas U can see in my image the circular objects in the centre have immideate neighbors as white pixels. But again beyond white pixels I have black pixels. So i could not understand how can I have the access over the center circles. I desire if by some means I can assign the outer black pixels as 1 or make them white then I can count the circles. But I am unable to do that.

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SANAHA PATHAN
SANAHA PATHAN 2016-7-25
i want to count number of silkworm eggs from this figure, i used L=Count(binaryfig) this command for counting number of objects ,this command works but i actually dont know what actually this command count,and result of this command is different every time
  3 个评论
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anna
anna 2016-10-5
编辑：anna 2016-10-5
hey I segmented blue nuclei from a blood smear image using k means color segmentation. how can i count the number of segmented blue nuclei. could u please help me with the code for counting [ cant use imfindcircle because the segmented nuclei are not exactly cirlce in shape ]

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Beenish Ishtiaq
Beenish Ishtiaq 2021-8-3
Need code for counting different shapes separatelly which shows each shape result respectively in different edit boxes in GUI matlab..
  2 个评论
Image Analyst
Image Analyst 2021-8-3
See my attached demos. I find that usually using findpeaks() to count the number of peaks in the plot of distance of perimeter from centroid works pretty well.

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