/// <summary>
/// Draws circle.
/// </summary>
/// <param name="image">Input image.</param>
/// <param name="circle">Circle</param>
/// <param name="color">Circle color.</param>
/// <param name="thickness">Contours thickness.</param>
/// <param name="opacity">Sets alpha channel where 0 is transparent and 255 is full opaque.</param>
public unsafe static void Draw(this Bgr <byte>[,] image, Circle circle, Bgr <byte> color, int thickness, byte opacity = Byte.MaxValue)
{
draw(image, opacity, cvImg =>
{
var center = new Point(circle.X, circle.Y);
CvCoreInvoke.cvCircle(&cvImg, center, circle.Radius, color.ToCvScalar(),
thickness, LineTypes.EightConnected, 0);
});
}
/// <summary>
/// Draws circle.
/// </summary>
/// <param name="image">Input image.</param>
/// <param name="circle">Circle</param>
/// <param name="color">Circle color.</param>
/// <param name="thickness">Contours thickness.</param>
public unsafe static void Draw(this Bgr <byte>[,] image, Circle circle, Bgr <byte> color, int thickness)
{
using (var img = image.Lock())
{
var iplImage = img.AsCvIplImage();
var center = new Point(circle.X, circle.Y);
CvCoreInvoke.cvCircle(&iplImage, center, circle.Radius, color.ToCvScalar(),
thickness, LineTypes.EightConnected, 0);
}
}
/// <summary>
/// Draws circles.
/// </summary>
/// <param name="image">Input image.</param>
/// <param name="circles">Circles</param>
/// <param name="color">Circle color.</param>
/// <param name="thickness">Contours thickness.</param>
/// <param name="opacity">Sets alpha channel where 0 is transparent and 255 is full opaque.</param>
public unsafe static void DrawCircles(this Bgr <byte>[,] image, IEnumerable <Circle> circles, Bgr <byte> color, int thickness, byte opacity = Byte.MaxValue)
{
Draw(image, opacity, cvImg =>
{
foreach (var circle in circles)
{
var center = new Point(circle.X, circle.Y);
CvCoreInvoke.cvCircle(&cvImg, center, circle.Radius, color.ToCvScalar(),
thickness, LineTypes.EightConnected, 0);
}
});
}