/// <summary>
/// update the framework with objects (templates) find in the frame
/// </summary>
/// <param name="templPyrs">the list of templates</param>
/// <param name="videoCapture">the video stream</param>
/// <param name="pictureBox">the picture box of window form</param>
/// /// <returns>nothing.</returns>
public void CaptureFrame(List <TemplatePyramid> templPyrs, ImageStreamReader videoCapture, PictureBox pictureBox)
{
DotImaging.Font font = new DotImaging.Font(FontTypes.HERSHEY_DUPLEX, 1, 0.1f);
videoCapture.ReadTo(ref frame);
if (frame == null)
{
return;
}
long preprocessTime, matchTime;
var bestRepresentatives = findObjects(frame, templPyrs, out preprocessTime, out matchTime);
/************************************ drawing ****************************************/
foreach (var m in bestRepresentatives)
{
frame.Draw(m.BoundingRect, Bgr <byte> .Blue, 1);
frame.Draw(m.Points.Select(x => new Circle(x.X, x.Y, 5)).ToArray(), Bgr <byte> .Blue, -1);
Console.WriteLine("Best template: " + m.Template.ClassLabel + " AT " + m.BoundingRect.X + " " + m.BoundingRect.Y + " ANGLE: " + m.Template.Angle + " score: " + m.Score);
}
frame.Draw(String.Format("Matching {0} templates in: {1} ms", templPyrs.Count, matchTime),
font, new DotImaging.Primitives2D.Point(10, 25), Bgr <byte> .Green);
/************************************ drawing ****************************************/
pictureBox.Image = frame.ToBitmap(); //it will be just casted (data is shared) 24bpp color
//frame.Save(String.Format("C:/probaImages/imgMarked_{0}.jpg", i)); b.Save(String.Format("C:/probaImages/img_{0}.jpg", i)); i++;
//GC.Collect();
}
/// <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 rectangle with the specified text on top.
/// </summary>
/// <param name="image">Image.</param>
/// <param name="rect">User specified area to annotate.</param>
/// <param name="text">Label.</param>
/// <param name="font">Font to use.</param>
public static void DrawAnnotation(this Bgr<byte>[,] image, Rectangle rect, string text, Font font)
{
const int VERTICAL_OFFSET = 5;
image.Draw(rect, Bgr<byte>.Red, 1);
var textSize = font.GetTextSize(text, 0);
var bottomLeftPt = new Point(rect.X + rect.Width / 2 - textSize.Width / 2, rect.Top - VERTICAL_OFFSET);
image.Draw(text, font, bottomLeftPt, Bgr<byte>.Black);
}
public static unsafe extern void cvPutText(IplImage* img, [MarshalAs(UnmanagedType.LPStr)] String text, Point org, ref Font font, CvScalar color);
public static unsafe extern void cvInitFont(ref Font font, FontTypes fontFace, double hscale, double vscale, double shear,
int thickness, LineTypes lineType);
public static extern void cvGetTextSize([MarshalAs(UnmanagedType.LPStr)] String textString, ref Font font, ref Size textSize, ref int baseline);
public static extern void cvGetTextSize([MarshalAs(UnmanagedType.LPStr)] String textString, ref Font font, ref Size textSize, ref int baseline);
public unsafe static extern void cvPutText(IplImage *img, [MarshalAs(UnmanagedType.LPStr)] String text, Point org, ref Font font, CvScalar color);
public unsafe static extern void cvInitFont(ref Font font, FontTypes fontFace, double hscale, double vscale, double shear,
int thickness, LineTypes lineType);
