Hmmm. . .the easiest way I can think of is to turn the circle into a polygon, clip using the rectangle, and then calculate the remaining area.

Step 1 − Start the algorithm Step 2 − Declare variables: p, q (circle centre coordinates), x, y (current point), r (radius), d (decision variable) Step 3 − Input the radius r Step 4 − Calculate ...

According to the drawback of the traditional circle target extraction algorithm used by Hough Transform, such as computation complexity, low efficiency and etc, an new circle target extraction ...