EmguCV学习——简略算法 差分与高斯

 1             //移动窗口        
　　　　　　[System.Runtime.InteropServices.DllImportAttribute("opencv_highgui2410.dll", EntryPoint = "cvMoveWindow")] 2         public static extern void cvMoveWindow([System.Runtime.InteropServices.InAttribute()] [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPStr)] string name, int x, int y); 3         //代表x帧差分，可以自由更改 4         static int USE_N_FRAMES_DIFF = 10; 5  6         public void PicDiff(string videoPath) 7         { 8             int iFrameIndex = 0; 9 10             IntPtr pIplGrayImg = IntPtr.Zero;11 12             IntPtr[] pIplFrameDiff = new IntPtr[USE_N_FRAMES_DIFF - 1];13 14             IntPtr[] pIplFrame = new IntPtr[USE_N_FRAMES_DIFF];15 16             IntPtr CatchFrame = CvInvoke.cvCreateFileCapture(videoPath);17             // 得到总帧数18             var count = CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_COUNT);19             // 视频宽度20             int wd = (int)CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_WIDTH);21             // 视频高度22             int hg = (int)CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_HEIGHT);23             //// 当前帧位置24             //CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_POS_FRAMES);25             //// 帧频26             CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FPS);27 28             CvInvoke.cvNamedWindow("source");29             CvInvoke.cvNamedWindow("Out");30             cvMoveWindow("source", 0, 0);31             cvMoveWindow("Out", 0, 350);32             IntPtr FrameImg;33 34             IntPtr rawImage = IntPtr.Zero;35             rawImage = CvInvoke.cvCreateImage(new Size(wd, hg), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);36             IntPtr pIplFrameDiffOr = IntPtr.Zero;37             IntPtr pIplFrameDiffOrCC = IntPtr.Zero;38             IntPtr pIplFrameSmooth = IntPtr.Zero;39             pIplFrameDiffOr = CvInvoke.cvCreateImage(new Size(wd, hg), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);40             pIplFrameDiffOrCC = CvInvoke.cvCreateImage(new Size(wd, hg), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);41             pIplFrameSmooth = CvInvoke.cvCreateImage(new Size(wd, hg), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);42 43             while ((FrameImg = CvInvoke.cvQueryFrame(CatchFrame)) != IntPtr.Zero)44             {45                46                 Rectangle cr = CvInvoke.cvGetImageROI(FrameImg);47 48                 pIplGrayImg = CvInvoke.cvCreateImage(cr.Size, Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);49                 50                 CvInvoke.cvCvtColor(FrameImg, pIplGrayImg, Emgu.CV.CvEnum.COLOR_CONVERSION.BGR2GRAY);51 52                 CvInvoke.cvSaveImage(savename, pIplGrayImg, IntPtr.Zero);53                 pIplFrame[iFrameIndex % USE_N_FRAMES_DIFF] = pIplGrayImg;54 55                 if (iFrameIndex >= USE_N_FRAMES_DIFF - 1)56                 {57                     for (int i = 0; i < USE_N_FRAMES_DIFF - 1; i++)58                     {59 60                         CvInvoke.cvAbsDiff(pIplFrame[i], pIplFrame[i + 1], rawImage);61                         pIplFrameDiff[i] = rawImage;62                         CvInvoke.cvThreshold(pIplFrameDiff[i], pIplFrameDiff[i], 20, 255, Emgu.CV.CvEnum.THRESH.CV_THRESH_BINARY);63 　　　　　　　　　　　　　　//上面第三个参数为设置的阀值以此来根据物体运动时前后帧的差异产生白点64                     }65 66                     for (int i = 0; i < USE_N_FRAMES_DIFF - 2; i++)67                     {68                         CvInvoke.cvOr(pIplFrameDiff[i], pIplFrameDiff[i + 1], pIplFrameDiffOr, IntPtr.Zero);69 70                         if (i + 1 < USE_N_FRAMES_DIFF - 2)71                         {72                             CvInvoke.cvCopy(pIplFrameDiffOr, pIplFrameDiff[i + 1], IntPtr.Zero);73                         }74 75                     }76                 }77                 78 79                 CvInvoke.cvShowImage("source", FrameImg);80                 CvInvoke.cvShowImage("Out", pIplFrameDiffOr);81                82                 CvInvoke.cvWaitKey(1);83                 iFrameIndex++;84 85             } 86 }                                        

 1      public void guassModel(string videoPath) 2       {    3             int iFrameIndex = 0; 4             IntPtr CatchFrame = CvInvoke.cvCreateFileCapture(videoPath); 5             // 得到总帧数 6             var count = CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_COUNT); 7             // 视频宽度 8             int wd = (int)CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_WIDTH); 9             // 视频高度10             int hg = (int)CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_HEIGHT);11             //// 帧频12             CvInvoke.cvGetCaptureProperty(CatchFrame, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FPS);13             IntPtr background = CvInvoke.cvCreateImage(new Size(wd, hg), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);14             IntPtr foreground = CvInvoke.cvCreateImage(new Size(wd, hg), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);15 16             IntPtr FrameImg;17             Emgu.CV.VideoSurveillance.BGStatModel<Bgr> bg = null;18             CvInvoke.cvNamedWindow("bg");19             CvInvoke.cvNamedWindow("fg");20             CvInvoke.cvNamedWindow("source");21             cvMoveWindow("bg", 400, 0);22             cvMoveWindow("gf", 800, 0);23             cvMoveWindow("source", 0, 0);24             while ((FrameImg = CvInvoke.cvQueryFrame(CatchFrame)) != IntPtr.Zero)25             {26                 Image<Bgr, byte> FramePic = new Image<Bgr, byte>(wd, hg);27                 CvInvoke.cvCopy(FrameImg, FramePic, IntPtr.Zero);28                 iFrameIndex++;29                 if (iFrameIndex == 1)30                 {31                     //高斯背景建模参数32                     Emgu.CV.Structure.MCvGaussBGStatModelParams pstruct = new MCvGaussBGStatModelParams();33                     pstruct.win_size = 50;34                     pstruct.n_gauss = 3;35                     pstruct.bg_threshold = 0.7;36                     pstruct.std_threshold = 3.5;37                     pstruct.minArea = 100; 38                     pstruct.weight_init = 0.333;39                     pstruct.variance_init = 30;40                     bg = new Emgu.CV.VideoSurveillance.BGStatModel<Bgr>(FramePic, ref pstruct);41                 }42                 else43                 {44                     CvInvoke.cvShowImage("source", FrameImg);45                     CvInvoke.cvWaitKey(10);46                     //更新47                     bg.Update(FramePic);48                     background = bg.BackgroundMask;49                     CvInvoke.cvShowImage("bg", background);50                     CvInvoke.cvWaitKey(10);51                     foreground = bg.ForegroundMask;52                     CvInvoke.cvShowImage("fg", foreground);53                     CvInvoke.cvWaitKey(10);54                 }55             }56             CvInvoke.cvDestroyWindow("source");57             CvInvoke.cvDestroyWindow("bg");58             CvInvoke.cvDestroyWindow("fg");59         }