C # Remote monitoring (2) Camera research

After n multi-research, finally selected OpenCV (Emgu CV)

* * As for DirectShow, OpenCV and so on other people can Baidu, here I will not repeat

Environment: VS2010 vs2012 vs2013 are available

OPENCV official website is: EMGU CV

can also go to my Baidu network disk download installation package: libemgucv-windows-universal-cuda-2.4.10.1940

Then you can think how to play, how to play.

After installation:

One of my demos, used to turn on the camera:

: C # calls the camera

Code structure:

Operating effect:

Core code Explanation:

namespacecameracapture{ Public Partial classCameracapture:form {Private ReadOnlyCapture _capture; Private BOOL_captureinprogress;  Publiccameracapture ()//constructor {InitializeComponent (); Try{_capture=NewCapture ();//construct a camera instance _capture. Imagegrabbed+=processframe;//image Capture Event}Catch(NullReferenceException excpt) {MessageBox.Show (excpt.            Message); }        }        Private voidProcessframe (Objectsender, EventArgs Arg) {Image&LT;BGR, byte> frame =_capture. Retrievebgrframe ();//Get video frame Image<gray, byte> grayframe = frame. Convert<gray, byte>(); Image<gray, byte> smallgrayframe =Grayframe.pyrdown (); Image<gray, byte> smoothedgrayframe =Smallgrayframe.pyrup (); Image<gray, byte> cannyframe = Smoothedgrayframe.canny ( -, -); Captureimagebox.image=frame; Grayscaleimagebox.image=Grayframe; Smoothedgrayscaleimagebox.image=Smoothedgrayframe; Cannyimagebox.image=cannyframe;//turn into a picture and display it on the main screen}Private voidCapturebuttonclick (Objectsender, EventArgs e) {            if(_capture! =NULL)            {                if(_captureinprogress) {//Stop the CaptureCapturebutton.text ="Start Capture"; _capture.                Pause (); }                Else                {                    //Start the CaptureCapturebutton.text ="Stop"; _capture.                Start (); } _captureinprogress= !_captureinprogress; }        }        Private voidreleasedata ()//release resource {if(_capture! =NULL) _capture.        Dispose (); }        Private voidFliphorizontalbuttonclick (Objectsender, EventArgs e) {            if(_capture! =NULL) _capture. FlipHorizontal =!_capture.        FlipHorizontal; }        Private voidFlipverticalbuttonclick (Objectsender, EventArgs e) {            if(_capture! =NULL) _capture. FlipVertical =!_capture.        flipvertical; }    }}

Extended

EMGUCV can not only control the camera, but also can play the local video directly, but need some configuration

         PublicCameracapture () {InitializeComponent (); Try            {                //_capture = new Capture ();                varFileName ="file Address"; _capture=NewCapture (fileName); _capture. Imagegrabbed+=Processframe; }            Catch(NullReferenceException excpt) {MessageBox.Show (excpt.            Message); }        }

There are two third-party files to download:

Opencv_ffmpeg.dll

Opencv_ffmpeg_64.dll

Three-way plugin can go to github opencv download three-party control, my Baidu network disk: Opencv_ffmpeg

These two files need to re-change the name (because add in error, always can not afford, Google long time):

Opencv_ffmpeg.dll opencv_ffmpegVersion. dll, Opencv_ffmpeg2410_64.dll

Opencv_ffmpeg_64.dll opencv_ffmpegVersion_64.dll-opencv_ffmpeg2410_64.dll

The last copy is added to the bin directory under X86,x64 to play the local video.

The effect is as follows:

If you have any questions, you can stand inside.

C # Remote monitoring (2) Camera research