There are many program samples that show how to use OpenCV using Python. In our case, we build a simple program to detect a circle in a still image.
Consider we have the following image, which is used for testing. You can find the image file in the source code files, called
To find a circle in a still image, we use circle Hough Transform (CHT). A circle can be defined as follows:
(a,b) is the center of a circle with radius r. These parameters will be computed using the CHT method.
Let's build a demo! ...