擅长:python、mysql、java
<p>绘制圆:</p>
<pre><code>cv2.circle(img, center, radius, color, thickness1, lineType, shift)
**Parameters:**
img (CvArr) – Image where the circle is drawn
center (CvPoint) – Center of the circle
radius (int) – Radius of the circle
color (CvScalar) – Circle color
thickness (int) – Thickness of the circle outline if positive, otherwise this indicates that a filled circle is to be drawn
lineType (int) – Type of the circle boundary, see Line description
shift (int) – Number of fractional bits in the center coordinates and radius value
</code></pre>
<p>例如:</p>
^{pr2}$