/// <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>
/// Converts an image to an bitmap.
/// </summary>
/// <param name="img">Input image.</param>
/// <returns>Bitmap</returns>
public static Bitmap ToBitmap(this Bgr<short>[,] img)
{
Bitmap bmp = null;
using (var uImg = img.Lock())
{
bmp = toBitmap(uImg, PixelFormat.Format48bppRgb);
}
return bmp;
}
/// <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>
/// Converts an image to an bitmap.
/// </summary>
/// <param name="img">Input image.</param>
/// <returns>Bitmap</returns>
public static Bitmap ToBitmap(this Bgr <byte>[,] img)
{
Bitmap bmp = null;
using (var uImg = img.Lock())
{
bmp = toBitmap(uImg, PixelFormat.Format24bppRgb);
}
return(bmp);
}
/// <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>
/// Displays the specified image in a window (non blocking mode).
/// </summary>
/// <param name="image">Image to show.</param>
/// <param name="windowTitle">Window title (ID).</param>
/// <param name="autoSize">True to adjust form to the image size, false otherwise.</param>
public static void Show(this Bgr <byte>[,] image, string windowTitle = "Image", bool autoSize = false)
{
CvInvoke.cvNamedWindow(windowTitle, autoSize ? WindowSizing.AutoSize : WindowSizing.Normal);
using (var uIm = image.Lock())
{
var mat = uIm.AsCvMat();
CvInvoke.cvShowImage(windowTitle, ref mat);
}
CvInvoke.cvWaitKey(5);
}
/// <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);
}
}
private unsafe static void draw(Bgr <byte>[,] image, byte opacity, Action <IplImage> drawingAction)
{
using (var uImg = image.Lock())
{
var cvImg = uImg.AsCvIplImage();
var cvOverlayImPtr = CvCoreInvoke.cvCloneImage(&cvImg);
drawingAction(*cvOverlayImPtr);
CvCoreInvoke.cvAddWeighted(cvOverlayImPtr, (float)opacity / Byte.MaxValue, &cvImg, 1 - (float)opacity / Byte.MaxValue, 0, &cvImg);
CvCoreInvoke.cvReleaseImage(&cvOverlayImPtr);
}
}
/// <summary>
/// Converts the specified managed array to the corresponding bitmap source.
/// </summary>
/// <param name="image">Managed array.</param>
/// <returns>Bitmap source.</returns>
public static BitmapSource ToBitmapSource(this Bgr <byte>[,] image)
{
BitmapSource bmpSource = null;
using (var uImg = image.Lock())
{
bmpSource = BitmapSource.Create(uImg.Width, uImg.Height, 96, 96,
PixelFormats.Bgr24, null,
uImg.ImageData, uImg.Stride * uImg.Height, uImg.Stride);
}
return(bmpSource);
}
/// <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.</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);
using (var img = image.Lock())
{
var iplImage = img.AsCvIplImage();
//TODO - noncritical: implement with cvContour
CvCoreInvoke.cvPolyLine(&iplImage, new IntPtr[] { contourHandle.AddrOfPinnedObject() }, new int[] { contour.Length }, 1,
true, color.ToCvScalar(), thickness, LineTypes.EightConnected, 0);
}
contourHandle.Free();
}
/// <summary>
/// Sets the specified image.
/// </summary>
/// <param name="image">Image to display.</param>
public void SetImage(Bgr <byte>[,] image)
{
if (bmp == null || bmp.Width != image.Width() || bmp.Height != image.Height())
{
bmp = new Bitmap(image.Width(), image.Height(), PixelFormat.Format24bppRgb);
}
using (BitmapData bmpData = bmp.Lock())
using (var uIm = image.Lock())
{
Copy.UnsafeCopy2D(uIm.ImageData, bmpData.Data, uIm.Stride, bmpData.ScanWidth, uIm.Height);
}
PictureBox.Image = bmp;
if (ScaleForm)
{
ClientSize = new Size(image.Width(), image.Height());
}
}
/// <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.</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();
using (var img = image.Lock())
{
var iplImage = img.AsCvIplImage();
for (int i = 0; i < vertices.Length; i++)
{
int idx2 = (i + 1) % vertices.Length;
CvCoreInvoke.cvLine(&iplImage, vertices[i].Round(), vertices[idx2].Round(),
color.ToCvScalar(opacity), thickness,
LineTypes.EightConnected, 0);
}
}
}
unsafe static void Draw(Bgr <byte>[,] image, byte opacity, Action <IplImage> drawingAction)
{
using (var uImg = image.Lock())
DrawingNativeImage.Draw(uImg, opacity, drawingAction);
}
