Counting objects in an image

137 Ansichten (letzte 30 Tage)
subrajeet
subrajeet am 7 Jan. 2013
Kommentiert: Beenish Ishtiaq am 5 Aug. 2021
Dear Researchers, I have a problem of counting objects in an image. Suppose I have the below image (below link)
which i got after segmentation.
how can I count the small circles in the middle of the image. Kindly suggest
Subrajeet

Akzeptierte Antwort

Image Analyst
Image Analyst am 7 Jan. 2013
Bearbeitet: Image Analyst am 7 Jan. 2013
  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 Kommentare
subrajeet
subrajeet am 7 Jan. 2013
@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 am 7 Jan. 2013
Bearbeitet: Image Analyst am 7 Jan. 2013
It's just basic, elementary image segmentation via intensity thresholding. Nothing fancy at all. See updated instructions above.

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (3)

Thomas
Thomas am 7 Jan. 2013
Bearbeitet: John Kelly am 8 Nov. 2017
You could use techniques shown in many MATLAB image processing demos.
  1 Kommentar
subrajeet
subrajeet am 7 Jan. 2013
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.

Melden Sie sich an, um zu kommentieren.


SANAHA PATHAN
SANAHA PATHAN am 25 Jul. 2016
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 Kommentare
anna
anna am 5 Okt. 2016
Bearbeitet: anna am 5 Okt. 2016
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 ]

Melden Sie sich an, um zu kommentieren.


Beenish Ishtiaq
Beenish Ishtiaq am 3 Aug. 2021
Need code for counting different shapes separatelly which shows each shape result respectively in different edit boxes in GUI matlab..
  2 Kommentare
Image Analyst
Image Analyst am 3 Aug. 2021
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.
Beenish Ishtiaq
Beenish Ishtiaq am 5 Aug. 2021
error in ''catch''

Melden Sie sich an, um zu kommentieren.

Kategorien

Mehr zu Geometric Transformation and Image Registration finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by