Opencv findcontours circle

Checkbox Detection with OpenCV - Fuzzy Labs

OpenCV: Fitting a single circle to an image (in Python) - Stack Overflow

python 3.x - Find multiple circles with different sizes in image - Stack Overflow

OpenCV Tutorial: A Guide to Learn OpenCV in Python

Finding a circle with a defective contour - OpenCV Q&A Forum

Extracting shapes from images using OpenCV and Python, by Debal B

python - Understanding contour hierarchies: How to distinguish filled circle/contour and unfilled circle/contour in OpenCV? - Stack Overflow

OPENCV & C++ TUTORIALS - 41, CONTOURS

Detecting circular shapes using contours

Contour Detection in OpenCV (Python) – OpenCV Tutorial in Python – Fusion of Engineering, Control, Coding, Machine Learning, and Science

Simple Edge Defect Detection in Concentric circles using OpenCV and Yolo, by Jaykumaran R