C # Learning Call Aforge.net Framework launch camera __.net

Today began to work on the C # launch camera, previously done with C + + call OpenCV Library to start the camera, C # theoretically can also. But read this blog notes, immediately brain hole open, the original can and the camera to deal with the library so much AH. Before I could do it until OpenCV. Ashamed, his knowledge is too narrow.

Of course, today's plays are the Aforge.net Framework.

Let's start by looking at a simple example that I've been crunching:

Because it is evening, the light is not very good oh. Cause it doesn't look good enough.

function is actually very simple, open the camera, capture each frame image ---------aforge.net Framework Introduction 1, Introduction

Aforge.net is a specially designed for developers and researchers based on the C # Framework, which includes computer vision and artificial intelligence, image processing, neural networks, genetic algorithms, machine learning, fuzzy systems, robot control, and other fields. 2, the main structure

This framework consists of a series of class libraries. Mainly include:
aforge.imaging--some of the day-to-day image processing and filters
aforge.vision--Computer Vision Application Class Library
aforge.neuro--Neural Network Computing Library aforge.genetic-Evolutionary algorithm programming library
aforge.machinelearning--Machine Learning Class Library
aforge.robotics--provides tools class libraries for robots
aforge.video--a series of video processing class libraries
aforge.fuzzy--Fuzzy Inference System class Library
aforge.controls--image, three-dimensional, chart Display control---------------Download

Now, the version has been updated to 2.2.5.

Download Connection: http://www.aforgenet.com/framework/downloads.html

----------------Add a reference to vs

1, create a new C # Window reference program. Drag a button control and a PictureBox control in the Toolbox. The location and size of the space from the set.

2, add a reference.

The name of the DLL you have added is:

AForge.Video.DirectShow.dll
AForge.Video.dll

------------Add Namespaces

Using AForge.Video.DirectShow;
Using Aforge.video;

------------Adding class properties

---Declare variable public
        filterinfocollection use_webcams = null;
        public Videocapturedevice cam = null;

--------------button to click event code

        ---button click event
        private void Startbtn_click (object sender, EventArgs e)
        {
            try
            {
                if (Startbtn.text = = "Start")
                {
                    ///--
                    startbtn.text = "Stop";
                    ---Start the camera
                    cam. Start ();
                }
                else
                {
                    ///--set button hint
                    startbtn.text = "Start";
                    --Stop camera capture image
                    Cam. Stop ();
                }
            catch (Exception ex)
            {
                MessageBox.Show (ex. message);
            }
        

--------The window's load function source

        --Window Load event private void Form1_Load (object sender, EventArgs e) {try {
                ---Instantiate object use_webcams = new Filterinfocollection (filtercategory.videoinputdevice);
                    ---camera number is greater than 0 if (Use_webcams.count > 0) {///---disable button
                    Startbtn.enabled = true; ---instantiated object cam = new Videocapturedevice (Use_webcams[0].
                    monikerstring); ---bind event cam.
                Newframe + = new Newframeeventhandler (cam_newframe);
                    else {///--has no webcam startbtn.enabled = false;
                ---tip No camera messagebox.show ("No Camera peripherals"); } catch (Exception ex) {MessageBox.Show (ex).
            message);
    }    } 

Here is a custom function, the source code is as follows:

        ------The custom Function
        private void Cam_newframe (Object obj, Newframeeventargs EventArgs)
        {
            pictureBox1.Image = ( Bitmap) EventArgs.Frame.Clone ();
            ---throw new notimplementedexception ();
        }

formclosed Event Source for---------window

       ---window Shutdown event
        private void Form1_formclosed (object sender, Formclosedeventargs e)
        {
            try
            {
                if ( Cam!= null)
                {
                    ///---Turn off the camera
                    if (CAM). isrunning)
                    {
                        cam. Stop ();
            }} catch (Exception ex)
            {
                MessageBox.Show (ex. message);
            }
        

-----Compile Run try

------Complete source code is as follows

Using System;
Using System.Collections.Generic;
Using System.ComponentModel;
Using System.Data;
Using System.Drawing;
Using System.Linq;
Using System.Text;
Using System.Windows.Forms;
---Add a namespace using AForge.Video.DirectShow;

Using Aforge.video; namespace Os_webcam {public partial class Form1:form {public Form1 () {Initializec
        Omponent ();
        ///---Declare variable public filterinfocollection use_webcams = null;


        public Videocapturedevice cam = null;
                ---button clicked event private void Startbtn_click (object sender, EventArgs e) {try { if (Startbtn.text = = "Start") {///--Startbtn.text = "Stop"
                    ; ---start the camera cam.
                Start ();
                    else {///--Set button prompt Startbtn.text = "Start"; --Stop camera captureImage Cam.
                Stop (); } catch (Exception ex) {MessageBox.Show (ex).
            message);
            }//--window Load event private void Form1_Load (object sender, EventArgs e) {try {///---instantiated object use_webcams = new Filterinfocollection (Filtercategory.videoinputdevic
                e);
                    ---camera number is greater than 0 if (Use_webcams.count > 0) {///---disable button
                    Startbtn.enabled = true; ---instantiated object cam = new Videocapturedevice (Use_webcams[0].
                    monikerstring); ---bind event cam.
                Newframe + = new Newframeeventhandler (cam_newframe);
                    else {///--has no webcam startbtn.enabled = false; ---tip no camera MesSagebox.show ("No Camera peripherals"); } catch (Exception ex) {MessageBox.Show (ex).
            message);
            }///------Custom function private void Cam_newframe (Object obj, Newframeeventargs eventArgs) {
            pictureBox1.Image = (Bitmap) eventArgs.Frame.Clone ();
        ---throw new notimplementedexception ();
            ///---window closes event private void form1_formclosed (object sender, Formclosedeventargs e) {
                    try {if (Cam!= null) {///---turn off the camera if (Cam. isrunning) {cam.
                    Stop (); '} ' catch (Exception ex) {MessageBox.Show (ex).
            message); }
        }
    }
}