■ 동작을 검출하는 방법을 보여준다.
▶ MainForm.cs
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using System; using System.Drawing; using System.Windows.Forms; using Emgu.CV; using Emgu.CV.CvEnum; using Emgu.CV.Structure; using Emgu.CV.VideoSurveillance; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : Form { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 캡처 /// </summary> private Capture capture; /// <summary> /// 동작 히스토리 /// </summary> private MotionHistory motionHistory; /// <summary> /// BGFG 검출기 /// </summary> private IBGFGDetector<Bgr> bgfgDetector; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); if(this.capture == null) { try { this.capture = new Capture(); } catch(Exception exception) { MessageBox.Show(exception.Message); } } if(this.capture != null) { this.motionHistory = new MotionHistory ( 1.0, // 동작 히스토리 지속 시간 (초 단위) 0.05, // cvCalcMotionGradient용 maxDelta (초 단위) 0.5 // cvCalcMotionGradient용 minDelta (초 단위) ); this.capture.ImageGrabbed += capture_ImageGrabbed; this.capture.Start(); } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 폼 닫는 경우 처리하기 - Form_FormClosed(sender, e) /// <summary> /// 폼 닫는 경우 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Form_FormClosed(object sender, FormClosedEventArgs e) { this.capture.Stop(); } #endregion #region 캡처 이미지 GRAB 처리하기 - capture_ImageGrabbed(sender, e) /// <summary> /// 캡처 이미지 GRAB 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void capture_ImageGrabbed(object sender, EventArgs e) { using(Image<Bgr, Byte> captureImage = this.capture.RetrieveBgrFrame()) { using(MemStorage storage = new MemStorage()) { if(this.bgfgDetector == null) { this.bgfgDetector = new FGDetector<Bgr>(FORGROUND_DETECTOR_TYPE.FGD); } this.bgfgDetector.Update(captureImage); this.captureImageBox.Image = captureImage; this.motionHistory.Update(this.bgfgDetector.ForegroundMask); this.forgroundMaskImageBox.Image = this.bgfgDetector.ForegroundMask; #region 동작 마스크 복사본을 구하고 색상을 보정한다. double[] minimumValueArray; double[] maximumValueArray; Point[] minimumPointArray; Point[] maximumPointArray; this.motionHistory.Mask.MinMax(out minimumValueArray, out maximumValueArray, out minimumPointArray, out maximumPointArray); Image<Gray, Byte> motionMaskImage = this.motionHistory.Mask.Mul(255.0 / maximumValueArray[0]); #endregion #region 동작 이미지를 설정한다. Image<Bgr, Byte> motionImage = new Image<Bgr, byte>(motionMaskImage.Size); motionImage[0] = motionMaskImage; #endregion // 동작 영역을 정의하는 한계점은 미세 동작 검출 값을 줄인다. double minimumArea = 100; storage.Clear(); Seq<MCvConnectedComp> motionComponentSequence = this.motionHistory.GetMotionComponents(storage); foreach(MCvConnectedComp motionComponent in motionComponentSequence) { if(motionComponent.area < minimumArea) { continue; } // 특정 영역의 각도와 동작 픽셀 카운트를 찾는다. double angle; double motionPixelCount; this.motionHistory.MotionInfo(motionComponent.rect, out angle, out motionPixelCount); if(motionPixelCount < motionComponent.area * 0.05) { continue; } DrawMotion(motionImage, motionComponent.rect, angle, new Bgr(Color.Red)); } // 전체 동작 각도를 찾고 그린다. double overallAngle; double overallMotionPixelCount; this.motionHistory.MotionInfo(motionMaskImage.ROI, out overallAngle, out overallMotionPixelCount); DrawMotion(motionImage, motionMaskImage.ROI, overallAngle, new Bgr(Color.Green)); UpdateMessage ( string.Format ( "전체 탐지 동작 : {0}; 동작 픽셀 카운트 : {1}", motionComponentSequence.Total, overallMotionPixelCount ) ); this.motionImageBox.Image = motionImage; } } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 메시지 갱신하기 - UpdateMessage(message) /// <summary> /// 메시지 갱신하기 /// </summary> /// <param name="message">메시지</param> private void UpdateMessage(string message) { if(InvokeRequired && !IsDisposed) { Invoke((Action<string>)UpdateMessage, message); } else { this.message.Text = message; } } #endregion #region 동작 그리기 - DrawMotion(image, motionRectangle, angle, color) /// <summary> /// 동작 그리기 /// </summary> /// <param name="image">이미지</param> /// <param name="motionRectangle">동작 사각형</param> /// <param name="angle">각도</param> /// <param name="color">색상</param> private static void DrawMotion(Image<Bgr, Byte> image, Rectangle motionRectangle, double angle, Bgr color) { float circleRadius = (motionRectangle.Width + motionRectangle.Height) >> 2; Point centerPoint = new Point ( motionRectangle.X + motionRectangle.Width >> 1, motionRectangle.Y + motionRectangle.Height >> 1 ); CircleF circle = new CircleF(centerPoint, circleRadius); int directionX = (int)(Math.Cos(angle * (Math.PI / 180.0)) * circleRadius); int directionY = (int)(Math.Sin(angle * (Math.PI / 180.0)) * circleRadius); Point pointOnCircle = new Point(centerPoint.X + directionX, centerPoint.Y - directionY); LineSegment2D line = new LineSegment2D(centerPoint, pointOnCircle); image.Draw(circle, color, 1); image.Draw(line, color, 2); } #endregion } } |
