iis建立好网站 怎么打开,百度2018旧版下载,搜索营销案例,都江堰网站建设培训概述之前有个需求#xff0c;就是在web界面可以实现调用摄像头#xff0c;用户把手机的个人二维码展示给摄像头#xff0c;摄像头进行摄像识别用户。其实本质就是保存图像二维码#xff0c;在进行二维码识别。下面来看看如何实现。主要代码实现1、初始化摄像头/// summ… 概述之前有个需求就是在web界面可以实现调用摄像头用户把手机的个人二维码展示给摄像头摄像头进行摄像识别用户。其实本质就是保存图像二维码在进行二维码识别。下面来看看如何实现。主要代码实现1、初始化摄像头 /// summary/// 初始化摄像头/// /summary/// param namehandle控件的句柄/param/// param nameleft开始显示的左边距/param/// param nametop开始显示的上边距/param/// param namewidth要显示的宽度/param/// param nameheight要显示的长度/parampublic 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, long lParam);
2、开始显示图像 /// summary/// 开始显示图像/// /summarypublic 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;}
3、停止显示 /// summary/// 停止显示/// /summarypublic void Stop(){SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);bStat false;}
4、抓图 /// summary/// 抓图/// /summary/// param namepath要保存bmp文件的路径/parampublic void GrabImage(string path){IntPtr hBmp Marshal.StringToHGlobalAnsi(path);SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt64());}/// summary/// 录像/// /summary/// param namepath要保存avi文件的路径/parampublic void Kinescope(string path){IntPtr hBmp Marshal.StringToHGlobalAnsi(path);SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt64());SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0);}/// summary/// 停止录像/// /summarypublic void StopKinescope(){SendMessage(hWndC, WM_CAP_STOP, 0, 0);}
完整代码using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Windows.Forms;using System.Runtime.InteropServices;using com.google.zxing.qrcode.decoder;
using com.google.zxing.client;
using com.google.zxing.common;using System.Threading;public partial class Decode : System.Web.UI.Page
{// public delegate void SaveImg(Pick Pick1);/// summary/// 一个控制摄像头的类/// /summarypublic 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;/// summary/// 初始化摄像头/// /summary/// param namehandle控件的句柄/param/// param nameleft开始显示的左边距/param/// param nametop开始显示的上边距/param/// param namewidth要显示的宽度/param/// param nameheight要显示的长度/parampublic 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, long lParam);/// summary/// 开始显示图像/// /summarypublic 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;}/// summary/// 停止显示/// /summarypublic void Stop()
{SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);bStat false;}/// summary/// 抓图/// /summary/// param namepath要保存bmp文件的路径/parampublic void GrabImage(string path)
{IntPtr hBmp Marshal.StringToHGlobalAnsi(path);SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt64());}/// summary/// 录像/// /summary/// param namepath要保存avi文件的路径/parampublic void Kinescope(string path)
{IntPtr hBmp Marshal.StringToHGlobalAnsi(path);SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt64());SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0);}/// summary/// 停止录像/// /summarypublic void StopKinescope()
{SendMessage(hWndC, WM_CAP_STOP, 0, 0);}}protected void Page_Load(object sender, EventArgs e)
{}//void DoInit()//{// System.Windows.Forms.Form frm new Form();// frm.Height 300;// frm.Width 300;// System.Windows.Forms.PictureBox Panel new System.Windows.Forms.PictureBox();// Panel.Height 300;// Panel.Width 300;// Panel.Visible true;// Panel.BackgroundImageLayout ImageLayout.None;// frm.Controls.Add(Panel);// frm.TopMost true;// Pick p new Pick(Panel.Handle, 0, 0, 300, 300);// p.Start();// frm.Show();// p.Kinescope(Server.MapPath(img\\Decode2.avi));// p.GrabImage(Server.MapPath(img\\Decode1.bmp));// p.Stop();// frm.Close();// frm.Dispose();//}private void getQrcode()
{try{//ThreadStart worker new ThreadStart(DoInit);//Thread th new Thread(worker);//th.IsBackground true;//th.Start();System.Windows.Forms.Form frm new Form();frm.Height 300;frm.Width 300;System.Windows.Forms.PictureBox Panel new System.Windows.Forms.PictureBox();Panel.Height 300;Panel.Width 300;Panel.Visible true;Panel.BackgroundImageLayout ImageLayout.None;frm.Controls.Add(Panel);frm.TopMost true;Pick p new Pick(Panel.Handle, 0, 0, 300, 300);p.Start();int i 1;while (i 1){p.GrabImage(Server.MapPath(img\\Decode.bmp));p.Kinescope(Server.MapPath(img\\Video.avi));i;}p.Stop();frm.Close();frm.Dispose();try{com.google.zxing.qrcode.QRCodeReader d new com.google.zxing.qrcode.QRCodeReader();RGBLuminanceSource rg new RGBLuminanceSource(new System.Drawing.Bitmap(Server.MapPath(img\\Decode.bmp)), new System.Drawing.Bitmap(Server.MapPath(img\\Decode.bmp)).Width, new System.Drawing.Bitmap(Server.MapPath(img\\Decode.bmp)).Height);com.google.zxing.LuminanceSource ls rg;HybridBinarizer hb new HybridBinarizer(ls);com.google.zxing.BinaryBitmap bm new com.google.zxing.BinaryBitmap(hb);com.google.zxing.Result r d.decode(bm);TextBox1.Text r.Text;}catch (Exception ex){TextBox1.Text ;//MessageBox.Show(ex.Message111);throw new Exception(ex.Message);}}catch (Exception ee){ee.ToString();}}protected void Timer1_Tick(object sender, EventArgs e)
{//getQrcode();}protected void Button1_Click(object sender, EventArgs e)
{getQrcode();}}
