C# 调用 摄像头 拍照 示例源码

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing.Imaging;using System.Text;using System.Windows;using System.Windows.Forms;using System.IO;using System.Windows.Media.Imaging;using AForge;using AForge.Controls;using AForge.Video;using AForge.Video.DirectShow;using Size = System.Drawing.Size;using System.Configuration;using System.Drawing;using System.Drawing.Drawing2D;namespace OperateCamera{ public partial class Form1 : Form { private FilterInfoCollection videoDevices; private VideoCaptureDevice videoSource; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { try { // 枚举所有视频输入设备 videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice); if (videoDevices.Count == 0) throw new ApplicationException(); foreach (FilterInfo device in videoDevices) { tscbxCameras.Items.Add(device.Name); } tscbxCameras.SelectedIndex = 0; } catch (ApplicationException) { tscbxCameras.Items.Add("No local capture devices"); videoDevices = null; } } private void btnConnect_Click(object sender, EventArgs e) { CameraConn(); } //连接摄像头 private void CameraConn() { videoSourcePlayer.SignalToStop(); videoSourcePlayer.WaitForStop(); VideoCaptureDevice videoSource = new VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString); videoSource.DesiredFrameSize = new System.Drawing.Size(1280, 1024); videoSource.DesiredFrameRate = 1; videoSourcePlayer.VideoSource = videoSource; videoSourcePlayer.Start(); } //关闭摄像头 private void btnClose_Click(object sender, EventArgs e) { videoSourcePlayer.SignalToStop(); videoSourcePlayer.WaitForStop(); } //主窗体关闭 private void Form1_FormClosing(object sender, FormClosingEventArgs e) { btnClose_Click(null, null); } //拍照 private void Photograph_Click(object sender, EventArgs e) { try { if (videoSourcePlayer.IsRunning) { BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap( videoSourcePlayer.GetCurrentVideoFrame().GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());// PngBitmapEncoder pE = new PngBitmapEncoder(); BitmapFrame bitmap = BitmapFrame.Create(bitmapSource); pE.Frames.Add(bitmap); string fileName = DateTime.Now.ToString("yyyyMMddHHmmss") "_1"; string fileSaveName = DateTime.Now.ToString("yyyyMMddHHmmss"); string picName = GetImagePath() "\\" fileName ".jpg"; string saveName = GetImagePath() "\\" fileSaveName ".jpg"; if (File.Exists(picName)) { File.Delete(picName); } using (Stream stream = File.Create(picName)) { pE.Save(stream); } //拍照完成后关摄像头并刷新同时关窗体 //if (videoSourcePlayer != null && videoSourcePlayer.IsRunning) //{ // videoSourcePlayer.SignalToStop(); // videoSourcePlayer.WaitForStop(); //} GetThumbnail(picName, saveName, 1920, 1080); } } catch (Exception ex) { MessageBox.Show("摄像头异常：" ex.Message); } } //文件存储路径 private string GetImagePath() { AppSettingsReader reader = new AppSettingsReader(); string strServer = reader.GetValue("ServerPath", typeof(string)).ToString(); //string personImgPath = Path.GetDirectoryName(AppDomain.CurrentDomain.BaseDirectory) // Path.DirectorySeparatorChar.ToString() "PersonImg"; string personImgPath = "\\\\" strServer "\\upload"; if (!Directory.Exists(personImgPath)) { Directory.CreateDirectory(personImgPath); } return personImgPath; } /// <summary> /// 生成缩略图 /// </summary> /// <param name="serverImagePath">图片地址</param> /// <param name="thumbnailImagePath">缩略图地址</param> /// <param name="width">图片宽度</param> /// <param name="height">图片高度</param> /// <param name="p"></param> public static bool GetThumbnail(string serverImagePath, string thumbnailImagePath, int width, int height) { System.Drawing.Image serverImage = System.Drawing.Image.FromFile(serverImagePath); //画板大小 int towidth = width; int toheight = height; //缩略图矩形框的像素点 int x = 0; int y = 0; int ow = serverImage.Width; int oh = serverImage.Height; if (ow > oh) { toheight = serverImage.Height * width / serverImage.Width; } else { towidth = serverImage.Width * height / serverImage.Height; } //新建一个bmp图片 System.Drawing.Image bm = new System.Drawing.Bitmap(width, height); //新建一个画板 System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bm); //设置高质量插值法 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; //设置高质量,低速度呈现平滑程度 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //清空画布并以透明背景色填充 g.Clear(System.Drawing.Color.White); //在指定位置并且按指定大小绘制原图片的指定部分 g.DrawImage(serverImage, new System.Drawing.Rectangle((width - towidth) / 2, (height - toheight) / 2, towidth, toheight), 0, 0, ow, oh, System.Drawing.GraphicsUnit.Pixel); try { //以jpg格式保存缩略图 bm.Save(thumbnailImagePath, System.Drawing.Imaging.ImageFormat.Jpeg); serverImage.Dispose(); bm.Dispose(); g.Dispose(); //删除原图 File.Delete(serverImagePath); return true; } catch (System.Exception e) { return false; throw e; } finally { serverImage.Dispose(); bm.Dispose(); g.Dispose(); } }// /// <summary> // /// 从视频中截取图片，调用GetNewImage方法，自定义图片大小，返回Bitmap格式图片// /// </summary> // /// <returns></returns> // private Bitmap GetImage()// {// Bitmap bitmap;// try// {// CameraForm.SendMessage(this.hHwnd, 0x41e, 0, 0);// System.Windows.IDataObject obj1 = System.Windows.Clipboard.GetDataObject();// if (obj1.GetDataPresent(typeof(Bitmap)))// {// bitmap= (Bitmap)obj1.GetData(typeof(Bitmap));// GetNewImage(bitmap, 300, 300);//自定图片大小// }//}// catch// {//}// return bitmap;// }// /// <summary> // /// 对图片进行处理,返回一个Image类别的对象 // /// </summary> // /// <param name="oldImgPath">原图片路径</param> // /// <param name="newWidth">新图片宽度</param> // /// <param name="newHeight">新图片高度</param> // /// <returns></returns> // private Image GetNewImage(Bitmap bmap, int newWidth, int newHeight)// {// Image oldImg = bmap;// Image newImg = oldImg.GetThumbnailImage(newWidth, newHeight, new Image.GetThumbnailImageAbort(IsTrue), IntPtr.Zero); // 对原图片进行缩放 // return newImg;// } } }