/// <summary>
/// Renders a captured image along with recognized contours
/// </summary>
private void DrawConturs(ContourFilter processor, System.Drawing.Bitmap imageBuffer)
{
System.Drawing.Font font = new System.Drawing.Font("Arial", 24);
// visual style of contours and labels
System.Drawing.Brush bgBrush = new System.Drawing.SolidBrush(System.Drawing.Color.FromArgb(255, 0, 0, 0));
System.Drawing.Brush foreBrush = new System.Drawing.SolidBrush(System.Drawing.Color.FromArgb(255, 255, 255, 255));
System.Drawing.Pen borderPen = new System.Drawing.Pen(System.Drawing.Color.FromArgb(255, 0, 0, 255));
borderPen.Width = 5;
// we use double buffer -> the rendering will take its place once the image is ready
System.Drawing.Graphics grBuffer = System.Drawing.Graphics.FromImage(imageBuffer);
grBuffer.ScaleTransform((float)(width / 640), (float)((height - 20) / 480));
foreach (FoundTemplateDesc found in processor.foundTemplates)
{
// draw detected contours along with their name and wrapping rectangle
System.Drawing.Rectangle foundRect = found.sample.contour.SourceBoundingRect;
System.Drawing.Point p1 = new System.Drawing.Point((foundRect.Left + foundRect.Right) / 2, foundRect.Top);
string text = found.template.name;
grBuffer.DrawRectangle(borderPen, foundRect);
grBuffer.DrawString(text, font, bgBrush, new System.Drawing.PointF(p1.X + 1 - font.Height / 3, p1.Y + 1 - font.Height));
grBuffer.DrawString(text, font, foreBrush, new System.Drawing.PointF(p1.X - font.Height / 3, p1.Y - font.Height));
}
grBuffer.Dispose();
captureBox.CreateGraphics().DrawImage(imageBuffer, 0, 0);
}
private Boolean showAngle; // if true, normals of vertices will be shown
public CaptureWindow()
{
InitializeComponent();
this.resolutionComboBox.Items.Add("640x480");
this.resolutionComboBox.Items.Add("320x240");
this.resolutionComboBox.SelectedIndex = 1;
Processor = new ContourFilter();
}
/// <summary>
/// Resizes captured image and renders it along with all contours
/// </summary>
/// <param name="tempFrame">captured image</param>
/// <param name="processor">processor with detected contours</param>
public void DrawImage(Image <Bgr, byte> tempFrame, ContourFilter processor)
{
// Save the variables asynchronously
Dispatcher.BeginInvoke(new Action(() =>
{
width = Width;
height = Height;
}));
tempFrame = tempFrame.Resize((int)width, (int)(height - 20), Emgu.CV.CvEnum.INTER.CV_INTER_LINEAR);
DrawConturs(processor, tempFrame.Bitmap);
}
private void LoadProcessor()
{
processor = new ContourFilter();
processor.templates = CommonAttribService.DEFAULT_TEMPLATES;
// set default values
processor.finder.maxRotateAngle = CaptureSettings.Instance().DEFAULT_ROTATE_ANGLE *Math.PI / 180;
processor.minContourArea = CaptureSettings.Instance().DEFAULT_CONTOUR_MIN_AREA;
processor.minContourLength = CaptureSettings.Instance().DEFAULT_CONTOUR_MIN_LENGTH;
processor.finder.maxACFDescriptorDeviation = CaptureSettings.Instance().DEFAULT_MAX_ACF;
processor.finder.minACF = CaptureSettings.Instance().DEFAULT_MIN_ACF;
processor.finder.minICF = CaptureSettings.Instance().DEFAULT_MIN_ICF;
processor.noiseFilter = CaptureSettings.Instance().DEFAULT_NOISE_ENABLED;
processor.cannyThreshold = CaptureSettings.Instance().DEFAULT_NOISE_FILTER;
processor.adaptiveThresholdBlockSize = CaptureSettings.Instance().DEFAULT_ADAPTIVE_THRESHOLD_BLOCKSIZE;
processor.adaptiveThresholdParameter = CaptureSettings.Instance().DEFAULT_ADAPTIVE_THRESHOLD_PARAMETER;
processor.blur = CaptureSettings.Instance().DEFAULT_BLUR_ENABLED;
realTableManager = new RealTableManager(tableManager.TableDepositor);
realTableManager.Init(CommonAttribService.DEFAULT_TEMPLATES);
}
