C#在WinForm下用摄像头

using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using webcam; using PickHead; namespace test_avicap { public partial class Form1 : Form { // WebCamera wc; Pick pick; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { //b_play.Enabled = false; //b_stop.Enabled = true; //panelPreview.Size = new Size(330, 330); //wc = new WebCamera(panelPreview.Handle, panelPreview.Width, panelPreview.Height); //wc.StartWebCam(); int left=0; int top=0; int width=352; int height=288; pick = new Pick( panelPreview.Handle, left,top, width, height ); pick.Start(); } private void b_play_Click(object sender, EventArgs e) { //b_play.Enabled = false; //b_stop.Enabled = true; //panelPreview.Size = new Size(330, 330); //wc = new WebCamera(panelPreview.Handle, panelPreview.Width, panelPreview.Height); //wc.StartWebCam(); int left = 0; int top = 0; int width =352; int height = 288; pick = new Pick(panelPreview.Handle, left, top, width, height); pick.Start(); } private void b_stop_Click(object sender, EventArgs e) { //wc.CloseWebcam(); pick.Stop(); } protected override void OnClosing(CancelEventArgs e) { if (MessageBox.Show("退出本系统?", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK) Application.Exit(); else e.Cancel = true; } private void b_pic_Click(object sender, EventArgs e)//拍摄 { if (this.b_pic.Text == "拍摄&A") //用于摄像的 { b_pic.Text = "重照&C"; string path; sdf1.Filter = "图片*.bmp;*.jpg;.jpeg;*.gif|*.bmp|所有文件(*.*)|*.*"; if (sdf1.ShowDialog() == DialogResult.OK) { path = sdf1.FileName; pick.GrabImage(path); pic_show.ImageLocation = path; //并显示在方框中 pic_show.Location = new Point(110, 12); pic_show.Visible = true; panelPreview.Visible = false; pick.Stop(); } } else { b_pic.Text = "拍摄&A"; pic_show.Visible = false; panelPreview.Location = new Point(110, 12); panelPreview.Visible = true; pick.Start(); } } } } 调用的类(class1.cs) //本文是借助avicap32.dll库来驱动摄像头。做到了抓图、录像功能。 using System; using System.Runtime.InteropServices; using System.Drawing; using System.Drawing.Imaging; namespace PickHead { /// /// 一个控制摄像头的类 /// public class Pick { private const int WM_USER = 0x400; private const int WS_CHILD = 0x40000000; private const int WS_VISIBLE = 0x10000000; private const int WM_CAP_START = WM_USER; private const int WM_CAP_STOP = WM_CAP_START + 68; private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10; private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11; private const int WM_CAP_SAVEDIB = WM_CAP_START + 25; private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60; private const int WM_CAP_SEQUENCE = WM_CAP_START + 62; private const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20; private const int WM_CAP_SEQUENCE_NOFILE =WM_CAP_START+ 63; private const int WM_CAP_SET_OVERLAY =WM_CAP_START+ 51; private const int WM_CAP_SET_PREVIEW =WM_CAP_START+ 50; private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START +6; private const int WM_CAP_SET_CALLBACK_ERROR=WM_CAP_START +2; private const int WM_CAP_SET_CALLBACK_STATUSA= WM_CAP_START +3; private const int WM_CAP_SET_CALLBACK_FRAME= WM_CAP_START +5; private const int WM_CAP_SET_SCALE=WM_CAP_START+ 53; private const int WM_CAP_SET_PREVIEWRATE=WM_CAP_START+ 52; private IntPtr hWndC; private bool bStat = false; private IntPtr mControlPtr; private int mWidth; private int mHeight; private int mLeft; private int mTop; /// /// 初始化摄像头 /// /// 控件的句柄 /// 开始显示的左边距 /// 开始显示的上边距 /// 要显示的宽度 /// 要显示的长度 public Pick(IntPtr handle, int left, int top, int width,int height) { mControlPtr = handle; mWidth = width; mHeight = height; mLeft = left; mTop = top; } [DllImport("avicap32.dll")] private static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID); [DllImport("avicap32.dll")] private static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize ); [DllImport("User32.dll")] private static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam); /// /// 开始显示图像 /// public void Start() { if (bStat) return; bStat = true; byte[] lpszName = new byte[100]; hWndC = capCreateCaptureWindowA(lpszName,WS_CHILD|WS_VISIBLE ,mLeft,mTop,mWidth,mHeight,mControlPtr,0); if (hWndC.ToInt32() != 0) { SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0); SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0); SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0); SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0); SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0); SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0); SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0); SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0); } return; } /// /// 停止显示 /// public void Stop() { SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0); bStat = false; } /// /// 抓图 /// /// 要保存bmp文件的路径 public void GrabImage(string path) // public void GrabImage( ) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC,WM_CAP_SAVEDIB,0,hBmp.ToInt32()); } /// /// 录像 /// /// 要保存avi文件的路径 public void Kinescope(string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); SendMessage(hWndC,WM_CAP_FILE_SET_CAPTURE_FILEA,0,hBmp.ToInt32()); SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0); } /// /// 停止录像 /// public void StopKinescope() { SendMessage(hWndC, WM_CAP_STOP, 0, 0); } } }

 

C#在WinForm下用摄像头实现抓图和录制

主窗体 Form1.cs

(一个按钮b_pic,一个图片显示pic_show,一个panelPreview,一个保存文件sdf1) using System;