Draws a circle

img = cv.circle(img, center, radius)
[...] = cv.circle(..., 'OptionName', optionValue, ...)

Input

• img Image where the circle is drawn.
• center Center of the circle [x,y].
• radius Radius of the circle.

Output

• img Output image.

Options

• Color 3-element floating point vector specifying circle color. default is a black color
• Thickness Thickness of the circle outline, if positive. Negative thickness means that a filled circle is to be drawn (-1 or the string 'Filled'). default 1.
• LineType Type of the circle boundary. One of 8,4,'AA' (Anti-aliased line). default 8.
• Shift Number of fractional bits in the coordinates of the center and in the radius value. default 0.

The function cv.circle draws a simple or filled circle with a given center and radius.