/// <summary> /// Draws text on the provided image. /// </summary> /// <param name="image">Input image.</param> /// <param name="text">User text.</param> /// <param name="font">Font.</param> /// <param name="botomLeftPoint">Bottom-left point.</param> /// <param name="color">Text color.</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, string text, Font font, Point botomLeftPoint, Bgr <byte> color, byte opacity = Byte.MaxValue) { draw(image, opacity, cvImg => { CvCoreInvoke.cvPutText(&cvImg, text, botomLeftPoint, ref font, color.ToCvScalar()); }); }
/// <summary> /// Draws text on the provided image. /// </summary> /// <param name="image">Input image.</param> /// <param name="text">User text.</param> /// <param name="font">Font.</param> /// <param name="botomLeftPoint">Bottom-left point.</param> /// <param name="color">Text color.</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, string text, Font font, Point botomLeftPoint, Bgr <byte> color, byte opacity = Byte.MaxValue) { using (var img = image.Lock()) { var iplImage = img.AsCvIplImage(); CvCoreInvoke.cvPutText(&iplImage, text, botomLeftPoint, ref font, color.ToCvScalar()); } }
/// <summary> /// Draws ellipse. /// </summary> /// <param name="image">Input image.</param> /// <param name="ellipse">Ellipse.</param> /// <param name="color">Object's color.</param> /// <param name="thickness">Border thickness (-1 to fill the object).</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, Ellipse ellipse, Bgr <byte> color, int thickness, byte opacity = Byte.MaxValue) { draw(image, opacity, cvImg => { CvCoreInvoke.cvEllipse(&cvImg, ellipse.Center.Round(), Size.Round(ellipse.Size), ellipse.Angle, 0, 360, color.ToCvScalar(), thickness, LineTypes.EightConnected, 0); }); }
/// <summary> /// Draws ellipse. /// </summary> /// <param name="image">Input image.</param> /// <param name="ellipse">Ellipse.</param> /// <param name="color">Object's color.</param> /// <param name="thickness">Border thickness.</param> public unsafe static void Draw(this Bgr <byte>[,] image, Ellipse ellipse, Bgr <byte> color, int thickness) { using (var img = image.Lock()) { var iplImage = img.AsCvIplImage(); CvCoreInvoke.cvEllipse(&iplImage, ellipse.Center.Round(), Size.Round(ellipse.Size), ellipse.Angle, 0, 2 * System.Math.PI, 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> /// <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 rectangle. /// </summary> /// <param name="image">Input image.</param> /// <param name="rect">Rectangle.</param> /// <param name="color">Object's color.</param> /// <param name="thickness">Border thickness (-1 to fill the object).</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, Rectangle rect, Bgr <byte> color, int thickness, byte opacity = Byte.MaxValue) { if (float.IsNaN(rect.X) || float.IsNaN(rect.Y)) { return; } draw(image, opacity, cvImg => { CvCoreInvoke.cvRectangleR(&cvImg, rect, color.ToCvScalar(), thickness, LineTypes.EightConnected, 0); }); }
/// <summary> /// Draws rectangle. /// </summary> /// <param name="image">Input image.</param> /// <param name="rect">Rectangle.</param> /// <param name="color">Object's color.</param> /// <param name="thickness">Border thickness. If less than zero structure will be filled.</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, Rectangle rect, Bgr <byte> color, int thickness, byte opacity = Byte.MaxValue) { if (float.IsNaN(rect.X) || float.IsNaN(rect.Y)) { return; } using (var img = image.Lock()) { var iplImage = img.AsCvIplImage(); CvCoreInvoke.cvRectangleR(&iplImage, rect, color.ToCvScalar(opacity), thickness, LineTypes.EightConnected, 0); } }
/// <summary> /// Draws contour. /// </summary> /// <param name="image">Input image.</param> /// <param name="contour">Contour points.</param> /// <param name="color">Contour color.</param> /// <param name="thickness">Contours thickness (it does not support values smaller than 1).</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, Point[] contour, Bgr <byte> color, int thickness, byte opacity = Byte.MaxValue) { var contourHandle = GCHandle.Alloc(contour, GCHandleType.Pinned); draw(image, opacity, cvImg => { //TODO - noncritical: implement with cvContour CvCoreInvoke.cvPolyLine(&cvImg, new IntPtr[] { contourHandle.AddrOfPinnedObject() }, new int[] { contour.Length }, 1, true, color.ToCvScalar(), thickness, LineTypes.EightConnected, 0); }); contourHandle.Free(); }
/// <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); } }); }
/// <summary> /// Draws Box2D. /// </summary> /// <param name="image">Input image.</param> /// <param name="box">Box 2D.</param> /// <param name="color">Object's color.</param> /// <param name="thickness">Border thickness (-1 to fill the object).</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, Box2D box, Bgr <byte> color, int thickness, byte opacity = Byte.MaxValue) { if (thickness < 1) { throw new NotSupportedException("Only positive values are valid!"); } var vertices = box.GetVertices(); draw(image, opacity, cvImg => { for (int i = 0; i < vertices.Length; i++) { int idx2 = (i + 1) % vertices.Length; CvCoreInvoke.cvLine(&cvImg, vertices[i].Round(), vertices[idx2].Round(), color.ToCvScalar(), thickness, LineTypes.EightConnected, 0); } }); }