Diameter of Almost circular objects and degree of circularity
4 views (last 30 days)
Show older comments
Commented: Jason on 17 Jan 2023
Hello, I am trying to measure the diameter of central white spot and the dark area.
I understand they perfect circles but I'd like to get a close estimation and also a measure of circularity (I believe by a ratio of perimeter^2/area).
I thought imfindcircles would work, I have tried with both a binarised image and just the raw image (12 bit Tiff)
The size of my image is 300x300 pixels.
This was my attempt, - but its failing to find any circles.
myImagesc(app,ax1,IM); %My version of ImageSc (i.e. force colormap gray)
%Binarize if required
[centers, radii, metric] = imfindcircles(IM,[15 400],'ObjectPolarity','dark') %I've also tried "bright"
Image Analyst on 17 Jan 2023
Just threshold, call imclearborder, and then regionprops, asking for EquivDiameter. Let me know if you can't figure it out.
More Answers (0)
Find more on Image Segmentation and Analysis in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!Start Hunting!